Red

Red is the color at the end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–740 nanometres.[1] It is a primary color in the RGB color model and the CMYK color model, and is the complementary color of cyan. Reds range from the brilliant yellow-tinged scarlet and vermillion to bluish-red crimson, and vary in shade from the pale red pink to the dark red burgundy.[2] The red sky at sunset results from Rayleigh scattering, while the red color of the Grand Canyon and other geological features is caused by hematite or red ochre, both forms of iron oxide. Iron oxide also gives the red color to the planet Mars. The red colour of blood comes from protein hemoglobin, while ripe strawberries, red apples and reddish autumn leaves are colored by anthocyanins.[3]

Red pigment made from ochre was one of the first colors used in prehistoric art. The Ancient Egyptians and Mayans colored their faces red in ceremonies; Roman generals had their bodies colored red to celebrate victories. It was also an important color in China, where it was used to colour early pottery and later the gates and walls of palaces.[4]:60-61 In the Renaissance, the brilliant red costumes for the nobility and wealthy were dyed with kermes and cochineal. The 19th century brought the introduction of the first synthetic red dyes, which replaced the traditional dyes. Red also became the color of revolution; Soviet Russia adopted a red flag following the Bolshevik Revolution in 1917, later followed by China, Vietnam, and other communist countries.

Since red is the color of blood, it has historically been associated with sacrifice, danger and courage. Modern surveys in Europe and the United States show red is also the color most commonly associated with heat, activity, passion, sexuality, anger, love and joy. In China, India and many other Asian countries it is the color of symbolizing happiness and good fortune.[5]:39-63

Red
 
Strawberries
Cardinal
Cardinal Théodore Adrien Sarr 2
Magdalena Frackowiak
Chinese honor guard in column 070322-F-0193C-014.JPEG
Spectral coordinates
Wavelengthapprox. 625–740 [1] nm
Frequency~480–400 THz
    Color coordinates
Hex triplet#FF0000
sRGBB  (r, gb)(255, 0, 0)
SourceX11
B: Normalized to [0–255] (byte)

Shades and variations

Cardinal Théodore Adrien Sarr 2

Scarlet is one quarter of the way between the colors red and orange. It is the colour worn by a cardinal of the Catholic Church.

Cardinal

The cardinal takes its name from the colour worn by Catholic cardinals.

Cherry blossoms in the Tsutsujigaoka Park

Pink is a pale shade of red. Cherry blossoms in the Tsutsujigaoka Park, Sendai, Miyagi, Japan.

Red tikka powder

Vermilion is similar to scarlet, but slightly more orange. This is sindoor, a red cosmetic powder used in India; Some Hindu women put a stripe of sindoor in their hair to show they are married.

Udusse mattuv harilik vaher, punaste sügislehtedega. Läänemaa

Maple tree with red leaves in the morning mist Estonia

Harvard Crimson logo

Crimson is a strong, deep red containing a little blue. The emblem of Harvard University.

Chestnuts02

Maroon is a dark brownish red. Its name comes from marron, the French word for chestnut.[6][7]

Ruby gem

Ruby is the colour of a cut and polished ruby gemstone.

Red Wine Glass

Burgundy, claret, or Wine red, is a very dark red containing a little blue. In France this colour is known as Bordeaux.

See also below for shades of pink

In science and nature

Seeing red

Madrid Bullfight
Bulls, like dogs and many other animals, have dichromacy, which means they cannot distinguish the color red. They charge the matador's cape because of its motion, not its color.

The human eye sees red when it looks at light with a wavelength between approximately 625 and 740 nanometers.[1] It is a primary color in the RGB color model and the light just past this range is called infrared, or below red, and cannot be seen by human eyes, although it can be sensed as heat.[8] In the language of optics, red is the color evoked by light that stimulates neither the S or the M (short and medium wavelength) cone cells of the retina, combined with a fading stimulation of the L (long-wavelength) cone cells.[9]

Primates can distinguish the full range of the colors of the spectrum visible to humans, but many kinds of mammals, such as dogs and cattle, have dichromacy, which means they can see blues and yellows, but cannot distinguish red and green (both are seen as gray). Bulls, for instance, cannot see the red color of the cape of a bullfighter, but they are agitated by its movement.[10] (See color vision).

One theory for why primates developed sensitivity to red is that it allowed ripe fruit to be distinguished from unripe fruit and inedible vegetation.[11] This may have driven further adaptations by species taking advantage of this new ability, such as the emergence of red faces.[12]

Red light is used to help adapt night vision in low-light or night time, as the rod cells in the human eye are not sensitive to red.[13][14]

Red illumination was (and sometimes still is) used as a safelight while working in a darkroom as it does not expose most photographic paper and some films.[15] Today modern darkrooms usually use an amber safelight.

In color theory and on a computer screen

On the color wheel long used by painters, and in traditional color theory, red is one of the three primary colors, along with blue and yellow. Painters in the Renaissance mixed red and blue to make violet: Cennino Cennini, in his 15th-century manual on painting, wrote, "If you want to make a lovely violet colour, take fine lac [red lake], ultramarine blue (the same amount of the one as of the other) with a binder" he noted that it could also be made by mixing blue indigo and red hematite.[16]

In modern color theory, also known as the RGB color model, red, green and blue are additive primary colors. Red, green and blue light combined together makes white light, and these three colors, combined in different mixtures, can produce nearly any other color. This is the principle that is used to make all of the colors on your computer screen and your television. For example, magenta on a computer screen is made by a similar formula to that used by Cennino Cennini in the Renaissance to make violet, but using additive colors and light instead of pigment: it is created by combining red and blue light at equal intensity on a black screen. Violet is made on a computer screen in a similar way, but with a greater amount of blue light and less red light.[17]

So that the maximum number of colors can be accurately reproduced on your computer screen, each color has been given a code number, or sRGB, which tells your computer the intensity of the red, green and blue components of that color. The intensity of each component is measured on a scale of zero to 255, which means the complete list includes 16,777,216 distinct colors and shades. The sRGB number of pure red, for example, is 255, 00, 00, which means the red component is at its maximum intensity, and there is no green or blue. The sRGB number for crimson is 220, 20, 60, which means that the red is slightly less intense and therefore darker, there is some green, which leans it toward orange; and there is a larger amount of blue, which makes it slightly blue-violet.[17]

(See Web colors and RGB color model)

Boutet 1708 color circles

In a traditional color wheel from 1708, red, yellow and blue are primary colors. Red and yellow make orange, red and blue make violet.

RGB illumination

In modern color theory, red, green and blue are the additive primary colors, and together they make white. A combination of red, green and blue light in varying proportions makes all the colors on your computer screen and television screen.

RGB pixels

Tiny Red, green and blue sub-pixels (enlarged on left side of image) create the colors you see on your computer screen and TV.

Color of sunset

Crimson sunset
Sunsets and sunrises are often red because of an optical effect called Rayleigh scattering.

As a ray of white sunlight travels through the atmosphere to the eye, some of the colors are scattered out of the beam by air molecules and airborne particles due to Rayleigh scattering, changing the final color of the beam that is seen. Colors with a shorter wavelength, such as blue and green, scatter more strongly, and are removed from the light that finally reaches the eye.[18] At sunrise and sunset, when the path of the sunlight through the atmosphere to the eye is longest, the blue and green components are removed almost completely, leaving the longer wavelength orange and red light. The remaining reddened sunlight can also be scattered by cloud droplets and other relatively large particles, which give the sky above the horizon its red glow.[19]

Lasers

Lasers emitting in the red region of the spectrum have been available since the invention of the ruby laser in 1960. In 1962 the red helium–neon laser was invented,[20] and these two types of lasers were widely used in many scientific applications including holography, and in education. Red helium–neon lasers were used commercially in LaserDisc players. The use of red laser diodes became widespread with the commercial success of modern DVD players, which use a 660 nm laser diode technology. Today, red and red-orange laser diodes are widely available to the public in the form of extremely inexpensive laser pointers. Portable, high-powered versions are also available for various applications.[21] More recently, 671 nm diode-pumped solid state (DPSS) lasers have been introduced to the market for all-DPSS laser display systems, particle image velocimetry, Raman spectroscopy, and holography.[22]

Red's wavelength has been an important factor in laser technologies; red lasers, used in early compact disc technologies, are being replaced by blue lasers, as red's longer wavelength causes the laser's recordings to take up more space on the disc than would blue-laser recordings.[23]

Astronomy

  • Mars is called the Red Planet because of the reddish color imparted to its surface by the abundant iron oxide present there.[24]
  • Astronomical objects that are moving away from the observer exhibit a Doppler red shift.
  • Jupiter's surface displays a Great Red Spot caused by an oval-shaped mega storm south of the planet's equator.[25]
  • Red giants are stars that have exhausted the supply of hydrogen in their cores and switched to thermonuclear fusion of hydrogen in a shell that surrounds its core. They have radii tens to hundreds of times larger than that of the Sun. However, their outer envelope is much lower in temperature, giving them an orange hue. Despite the lower energy density of their envelope, red giants are many times more luminous than the Sun due to their large size.
  • Red supergiants like Betelgeuse, Antares and VY Canis Majoris, one of the biggest stars in the Universe, are the biggest variety of red giants. They are huge in size, with radii 200 to 2600 times greater than our Sun, but relatively cool in temperature (3000–4500 K), causing their distinct red tint. Because they are shrinking rapidly in size, they are surrounded by an envelope or skin much bigger than the star itself. The envelope of Betelgeuse is 250 times bigger than the star inside.
  • A red dwarf is a small and relatively cool star, which has a mass of less than half that of the Sun and a surface temperature of less than 4,000 K. Red dwarfs are by far the most common type of star in the Galaxy, but due to their low luminosity, from Earth, none are visible to the naked eye.[26]
Mars atmosphere

Mars appears to be red because of iron oxide on its surface.

Mira 1997

The red giant called Mira, a star which is glowing from thermonuclear fusion.

RedDwarfPlanet

Artist's impression of a red dwarf, a small, relatively cool star that appears red instead of white because of its lower temperature.

Fire

  • Fire is often shown as red in art, but flames are usually yellow, orange or blue. Coals are in the red spectrum, as are most burning items. Some elements exhibit a red color when burned: calcium, for example, produces a brick-red when combusted.[27]
Candleburning

Red is commonly associated with flames and fire, but flames are almost always yellow, orange or blue. Coals are in the red spectrum, as are most burning items.

Pigments and dyes

Hematite

Hematite, or iron ore, is the source of the red color of red ochre.

Roussillon sentier des ocres2

Red ochre cliffs near Roussillon in France. Red ochre is composed of clay tinted with hematite. Ochre was the first pigment used by man in prehistoric cave paintings.

Cinnabarit 01

The mineral cinnabar, the ore of mercury, is the source of the color vermilion. In Roman times, most cinnabar came from mines at Almadén in Spain, where the miners were usually prisoners and slaves. Mercury is highly toxic, and working in the mines was often a death sentence for the miners.

Vermillon pigment

Vermilion pigment, made from cinnabar. This was the pigment used in the murals of Pompeii and to color Chinese lacquerware beginning in the Song dynasty.

Rubia tinctorum - Köhler–s Medizinal-Pflanzen-123

Despite its yellow greenish flower, the roots of the Rubia tinctorum, or madder plant, produced the most common red dye used from ancient times until the 19th century.

Red lead

Red lead, also known as minium, has been used since the time of the ancient Greeks. Chemically it is known as lead tetroxide. The Romans prepared it by the roasting of lead white pigment. It was commonly used in the Middle Ages for the headings and decoration of illuminated manuscripts.

Dragon's blood (Daemomorops draco)

Dragon's blood is a bright red resin that is obtained from different species of a number of distinct plant genera: Croton, Dracaena, Daemonorops, Calamus rotang and Pterocarpus. The red resin was used in ancient times as a medicine, incense, dye and varnish for making violins in Italy.

Cochineal drawing

The tiny female cochineal insect of Spanish Mexico (on the left), was crushed to make the deep crimson color used in Renaissance costumes.

Dactylopius coccus 02

Extract of carmine, made by crushing cochineal and other scale insects which feed on the sap of live oak trees. Also called kermes, it was used from the Middle Ages until the 19th century to make crimson dye. Now it is used as a coloring for yoghurt and other food products.

Pau-brasil mococa sp

The Sappanwood tree, native to India, Malaysia and Sri Lanka, and later the related Brazilwood tree (shown here), from the coast of South America, were the source of a popular red pigment and dye called brazilin. The red wood was ground to powder and mixed with an alkaline solution. The brazilwood gave its name to the nation of Brazil.

Alizarin-sample

Alizarin was the first synthetic red dye, created by German chemists in 1868. It duplicated the colorant in the madder plant, but was cheaper and longer lasting. After its introduction, the production of natural dyes from the madder plant virtually ceased.

Red lac, red lake and crimson lake

Titian - The Vendramin Family Venerating a Relic of the True Cross (detail) - WGA22811
Titian used glazes of red lake to create the vivid crimson of the robes in The Vendramin Family Venerating a Relic of the True Cross, completed 1550–60 (detail).

Red lac, also called red lake, crimson lake or carmine lake, was an important red pigment in Renaissance and Baroque art. Since it was translucent, thin layers of red lac were built up or glazed over a more opaque dark color to create a particularly deep and vivid color.

Unlike vermilion or red ochre, made from minerals, red lake pigments are made by mixing organic dyes, made from insects or plants, with white chalk or alum. Red lac was made from the gum lac, the dark red resinous substance secreted by various scale insects, particularly the Laccifer lacca from India.[28] Carmine lake was made from the cochineal insect from Central and South America, Kermes lake came from a different scale insect, kermes vermilio, which thrived on oak trees around the Mediterranean. Other red lakes were made from the rose madder plant and from the brazilwood tree.

Red lake pigments were an important part of the palette of 16th-century Venetian painters, particularly Titian, but they were used in all periods.[29] Since the red lakes were made from organic dyes, they tended to be fugitive, becoming unstable and fading when exposed to sunlight.

Food coloring

The most common synthetic food coloring today is Allura Red AC is a red azo dye that goes by several names including: Allura Red, Food Red 17, C.I. 16035, FD&C Red 40,[30][31] It was originally manufactured from coal tar, but now is mostly made from petroleum.

In Europe, Allura Red AC is not recommended for consumption by children. It is banned in Denmark, Belgium, France and Switzerland, and was also banned in Sweden until the country joined the European Union in 1994.[32] The European Union approves Allura Red AC as a food colorant, but EU countries' local laws banning food colorants are preserved.[33]

In the United States, Allura Red AC is approved by the Food and Drug Administration (FDA) for use in cosmetics, drugs, and food. It is used in some tattoo inks and is used in many products, such as soft drinks, children's medications, and cotton candy. On June 30, 2010, the Center for Science in the Public Interest (CSPI) called for the FDA to ban Red 40.[34]

Because of public concerns about possible health risks associated with synthetic dyes, many companies have switched to using natural pigments such as carmine, made from crushing the tiny female cochineal insect. This insect, originating in Mexico and Central American, was used to make the brilliant scarlet dyes of the European Renaissance.

Autumn leaves

The red of autumn leaves is produced by pigments called anthocyanins. They are not present in the leaf throughout the growing season, but are actively produced towards the end of summer.[3] They develop in late summer in the sap of the cells of the leaf, and this development is the result of complex interactions of many influences—both inside and outside the plant. Their formation depends on the breakdown of sugars in the presence of bright light as the level of phosphate in the leaf is reduced.[35]

During the summer growing season, phosphate is at a high level. It has a vital role in the breakdown of the sugars manufactured by chlorophyll. But in the fall, phosphate, along with the other chemicals and nutrients, moves out of the leaf into the stem of the plant. When this happens, the sugar-breakdown process changes, leading to the production of anthocyanin pigments. The brighter the light during this period, the greater the production of anthocyanins and the more brilliant the resulting color display. When the days of autumn are bright and cool, and the nights are chilly but not freezing, the brightest colorations usually develop.

Anthocyanins temporarily color the edges of some of the very young leaves as they unfold from the buds in early spring. They also give the familiar color to such common fruits as cranberries, red apples, blueberries, cherries, raspberries, and plums.

Anthocyanins are present in about 10% of tree species in temperate regions, although in certain areas—a famous example being New England—up to 70% of tree species may produce the pigment.[3] In autumn forests they appear vivid in the maples, oaks, sourwood, sweetgums, dogwoods, tupelos, cherry trees and persimmons. These same pigments often combine with the carotenoids' colors to create the deeper orange, fiery reds, and bronzes typical of many hardwood species. (See Autumn leaf color).

Blood and other reds in nature

Oxygenated blood is red due to the presence of oxygenated hemoglobin that contains iron molecules, with the iron components reflecting red light.[36][37] Red meat gets its color from the iron found in the myoglobin and hemoglobin in the muscles and residual blood.[38]

Plants like apples, strawberries, cherries, tomatoes, peppers, and pomegranates are often colored by forms of carotenoids, red pigments that also assist photosynthesis.[39]

  • When used to describe natural animal coloration, "red" usually refers to a brownish, reddish-brown or ginger color. In this sense it is used to describe coat colors of reddish-brown cattle and dogs, and in the names of various animal species or breeds such as red fox, red squirrel, red deer, European robin, red grouse, red knot, redstart, redwing, red setter, Red Devon cattle, etc. This reddish-brown color is also meant when using the terms red ochre and red hair.
  • The red herring dragged across a trail to destroy the scent gets its color from the heavy salting and slow smoking of the fish, which results in a warm, brown color.
  • When used for flowers, red often refers to purplish (red deadnettle, red clover, red helleborine) or pink (red campion, red valerian) colors.
Agarplate redbloodcells edit

Red blood cell agar. Blood appears red due to the iron molecules in blood cells.

Can Setter dog GFDL

A red setter or Irish setter

Red Fox (Vulpes vulpes) -British Wildlife Centre-8

A pair of European red foxes.

Erithacus-rubecula-melophilus Dublin-Ireland

The European robin or robin redbreast

SteamedLobster

A cooked lobster

Hair color

Woman redhead natural portrait 1
Red hair only occurs in 1–2% of the human population

Red hair occurs naturally on approximately 1–2% of the human population.[40] It occurs more frequently (2–6%) in people of northern or western European ancestry, and less frequently in other populations. Red hair appears in people with two copies of a recessive gene on chromosome 16 which causes a mutation in the MC1R protein.

Red hair varies from a deep burgundy through burnt orange to bright copper. It is characterized by high levels of the reddish pigment pheomelanin (which also accounts for the red color of the lips) and relatively low levels of the dark pigment eumelanin. The term redhead (originally redd hede) has been in use since at least 1510. Cultural reactions have varied from ridicule to admiration; many common stereotypes exist regarding redheads and they are often portrayed as fiery-tempered. (See red hair).

In animal and human behavior

Red is associated with dominance in a number of animal species.[41] For example, in mandrills, red coloration of the face is greatest in alpha males, increasingly less prominent in lower ranking subordinates, and directly correlated with levels of testosterone.[42] Red can also affect the perception of dominance by others, leading to significant differences in mortality, reproductive success and parental investment between individuals displaying red and those not.[43] In humans, wearing red has been linked with increased performance in competitions, including professional sport[44][45] and multiplayer video games.[46] Controlled tests have demonstrated that wearing red does not increase performance or levels of testosterone during exercise, so the effect is likely to be produced by perceived rather than actual performance.[47] Judges of tae kwon do have been shown to favor competitors wearing red protective gear over blue,[48] and, when asked, a significant majority of people say that red abstract shapes are more "dominant", "aggressive", and "likely to win a physical competition" than blue shapes.[41] In contrast to its positive effect in physical competition and dominance behavior, exposure to red decreases performance in cognitive tasks[49] and elicits aversion in psychological tests where subjects are placed in an "achievement" context (e.g. taking an IQ test).[50]

History and art

Prehistory

Inside cave 13B at Pinnacle Point, an archeological site found on the coast of South Africa, paleoanthropologists in 2000 found evidence that, between 170,000 and 40,000 years ago, Late Stone Age people were scraping and grinding ochre, a clay colored red by iron oxide, probably with the intention of using it to color their bodies.[51]

Red hematite powder was also found scattered around the remains at a grave site in a Zhoukoudian cave complex near Beijing. The site has evidence of habitation as early as 700,000 years ago. The hematite might have been used to symbolize blood in an offering to the dead.[4]:4

Red, black and white were the first colors used by artists in the Upper Paleolithic age, probably because natural pigments such as red ochre and iron oxide were readily available where early people lived. Madder, a plant whose root could be made into a red dye, grew widely in Europe, Africa and Asia.[52] The cave of Altamira in Spain has a painting of a bison colored with red ochre that dates to between 15,000 and 16,500 BC.

A red dye called Kermes was made beginning in the Neolithic Period by drying and then crushing the bodies of the females of a tiny scale insect in the genus Kermes, primarily Kermes vermilio. The insects live on the sap of certain trees, especially Kermes oak trees near the Mediterranean region. Jars of kermes have been found in a Neolithic cave-burial at Adaoutse, Bouches-du-Rhône.[53]:230-31 Kermes from oak trees was later used by Romans, who imported it from Spain. A different variety of dye was made from Porphyrophora hamelii (Armenian cochineal) scale insects that lived on the roots and stems of certain herbs. It was mentioned in texts as early as the 8th century BC, and it was used by the ancient Assyrians and Persians.[54]:45

Kermes is also mentioned in the Bible. In the Book of Exodus, God instructs Moses to have the Israelites bring him an offering including cloth "of blue, and purple, and scarlet."[55] The term used for scarlet in the 4th-century Latin Vulgate version of the Bible passage is coccumque bis tinctum, meaning "colored twice with coccus." Coccus, from the ancient Greek Kokkos, means a tiny grain and is the term that was used in ancient times for the Kermes vermilio insect used to make the Kermes dye.[56] This was also the origin of the expression "dyed in the grain."[57]

Ancient history

In ancient Egypt, red was associated with life, health, and victory. Egyptians would color themselves with red ochre during celebrations.[58] Egyptian women used red ochre as a cosmetic to redden cheeks and lips[59] and also used henna to color their hair and paint their nails.[60]

But, like many colors, it also had a negative association, with heat, destruction and evil. A prayer to god Isis states: "Oh Isis, protect me from all things evil and red."[5]:45 The ancient Egyptians began manufacturing pigments in about 4000 BC. Red ochre was widely used as a pigment for wall paintings, particularly as the skin color of men. An ivory painter's palette found inside the tomb of King Tutankhamun had small compartments with pigments of red ochre and five other colors. The Egyptians used the root of the rubia, or madder plant, to make a dye, later known as alizarin, and also used it as a pigment, which became known as madder lake, alizarin or alizarin crimson.[61]

In Ancient China, artisans were making red and black painted pottery as early as the Yangshao Culture period (5000–3000 BC). A red-painted wooden bowl was found at a Neolithic site in Yuyao, Zhejiang. Other red-painted ceremonial objects have been found at other sites dating to the Spring and Autumn period (770–221 BC).[4]

During the Han dynasty (200 BC–200 AD) Chinese craftsmen made a red pigment, lead tetroxide, which they called ch-ien tan, by heating lead white pigment. Like the Egyptians, they made a red dye from the madder plant to color silk fabric for gowns and used pigments colored with madder to make red lacquerware.

Red lead or Lead tetroxide pigment was widely used as the red in Persian and Indian miniature paintings as well as in European art, where it was called minium.[61]

In India, the rubia plant has been used to make dye since ancient times. A piece of cotton dyed with rubia dated to the third millennium BC was found at an archaeological site at Mohenjo-daro.[62] It has been used by Indian monks and hermits for centuries to dye their robes.

The early inhabitants of America had their own vivid crimson dye, made from the cochineal, an insect of the same family as the Kermes of Europe and the Middle East, which feeds on the Opuntia, or prickly pear cactus plant. Red-dyed textiles from the Paracas culture (800–100 BC) have been found in tombs in Peru.

Red also featured in the burials of royalty in the Maya city-states. In the Tomb of the Red Queen inside Temple XIII in the ruined Maya city of Palenque (600–700 AD), the skeleton and ceremonial items of a noble woman were completely covered with bright red powder made from cinnabar.[63]

Pech Merle main

Image of a human hand created with red ochre in Pech Merle cave, France (Gravettian era, 25,000 BC).

AltamiraBison

Image of a bison from the cave of Altamira in Spain, painted with red ochre between 15,000 and 16.500 BC.

Akhenathon and Nefertiti E15593 mp3h8771

Painted statues of the ruler Akhenaten and Queen Nefertiti (1345 BC)

Banpo bowl

Painted red and black bowl from the Yangshao culture period in China (4500 BC), in the National Museum of Beijing

Mawangdui lacquerwares and tray

Chinese lacquerware from the Han Dynasty (200 BC–200 AD)

Paracas textile, British Museum

Textiles dyed red from the Paracas culture of Peru (about 200 BC), in the British Museum

In ancient Greece and the Minoan civilization of ancient Crete, red was widely used in murals and in the polychrome decoration of temples and palaces. The Greeks began using red lead as a pigment.

In Ancient Rome, Tyrian purple was the color of the Emperor, but red had an important religious symbolism. Romans wore togas with red stripes on holidays, and the bride at a wedding wore a red shawl, called a flammeum.[5]:46 Red was used to color statues and the skin of gladiators. Red was also the color associated with army; Roman soldiers wore red tunics, and officers wore a cloak called a paludamentum which, depending upon the quality of the dye, could be crimson, scarlet or purple. In Roman mythology red is associated with the god of war, Mars.[64] The vexilloid of the Roman Empire had a red background with the letters SPQR in gold. A Roman general receiving a triumph had his entire body painted red in honor of his achievement.[65]

The Romans liked bright colors, and many Roman villas were decorated with vivid red murals. The pigment used for many of the murals was called vermilion, and it came from the mineral cinnabar, a common ore of mercury. It was one of the finest reds of ancient times – the paintings have retained their brightness for more than twenty centuries. The source of cinnabar for the Romans was a group of mines near Almadén, southwest of Madrid, in Spain. Working in the mines was extremely dangerous, since mercury is highly toxic; the miners were slaves or prisoners, and being sent to the cinnabar mines was a virtual death sentence.[66]

KnossosFrescoRepro06827

A restored mural, called The Prince of Lilies, from the Bronze Age Palace of Minos at Knossos on Crete

Etruskischer Meister 002

Etruscan dancers in the Tomb of the Triclinium (470 BC)

Casa dei vettii ixion

A fresco in the House of the Vettii in Pompeii, from about 62 AD. It was buried by the eruption of Vesuvius in 79 AD and preserved.

Pompeii - Fullonica of Veranius Hypsaeus 2 - MAN

Roman wall painting showing a dye shop, Pompeii (40 BC). Dyed fabrics have been hung up to dry.

Postclassical history

In Europe

After the fall of the Western Roman Empire, red was adopted as a color of majesty and authority by the Byzantine Empire, the princes of Europe, and the Roman Catholic Church. It also played an important part in the rituals of the Catholic Church – it symbolized the blood of Christ and the Christian martyrs – and it associated the power of the kings with the sacred rituals of the Church.

Red was the color of the banner of the Byzantine emperors. In Western Europe, Emperor Charlemagne painted his palace red as a very visible symbol of his authority, and wore red shoes at his coronation.[54]:36-37 Kings, princes and, beginning in 1295, Roman Catholic cardinals began to wear red colored habitus. When Abbe Suger rebuilt Saint Denis Basilica outside Paris in the early 12th century, he added stained glass windows colored blue cobalt glass and red glass tinted with copper. Together they flooded the basilica with a mystical light. Soon stained glass windows were being added to cathedrals all across France, England and Germany. In medieval painting red was used to attract attention to the most important figures; both Christ and the Virgin Mary were commonly painted wearing red mantles.

Red clothing was a sign of status and wealth. It was worn not only by cardinals and princes, but also by merchants, artisans and townspeople, particularly on holidays or special occasions. Red dye for the clothing of ordinary people was made from the roots of the rubia tinctorum, the madder plant. This color leaned toward brick-red, and faded easily in the sun or during washing. The wealthy and aristocrats wore scarlet clothing dyed with kermes, or carmine, made from the carminic acid in tiny female scale insects, which lived on the leaves of oak trees in Eastern Europe and around the Mediterranean. The insects were gathered, dried, crushed, and boiled with different ingredients in a long and complicated process, which produced a brilliant scarlet.[54]:38-45

Brazilin was another popular red dye in the Middle Ages. It came from the sapanwood tree, which grew in India, Malaysia and Sri Lanka. A similar tree, brazilwood, grew on the coast of South America. The red wood was ground into sawdust and mixed with an alkaline solution to make dye and pigment. It became one of the most profitable exports from the New World, and gave its name to the nation of Brazil.[54]:38-45

Weltliche Schatzkammer Wienc

The crimson coronation mantle of Roger II of Sicily (1133–4), dyed with Kermes, the most prestigious red of the Middle Ages

Monreale photo ru Sibeaster14

Interior of a Byzantine church, the Cathedral of Monreale in Sicily, with a mosaic portrait of Christ dressed in red (12th century)

Vitraux Saint-Denis 190110 19

The Annunciation scene in stained glass, from the Saint Denis Basilica (early 12th century). Abbe Suger himself, the builder of the church, is pictured at the feet of the Virgin Mary, at right. She wears red with a green cloak.

Richard II King of England

King Richard II of England (1390s) dressed in red

Pope Innocent IV sends Dominicans and Franciscans out to the Tartars

Pope Innocent IV (1400–10) dressed in red, the symbol of the blood of Christ

Dyeing British Library Royal MS 15.E.iii, f. 269 1482

Dyeing wool, England (1482), from the British Museum

In Asia

Red has been an important color in Chinese culture, religion, industry, fashion and court ritual since ancient times. Silk was woven and dyed as early as the Han Dynasty (25–220 BC). China had a monopoly on the manufacture of silk until the 6th century AD, when it was introduced into the Byzantine Empire. In the 12th century, it was introduced into Europe.[67]

At the time of the Han Dynasty, Chinese red was a light red, but during the Tang dynasty new dyes and pigments were discovered. The Chinese used several different plants to make red dyes, including the flowers of the safflour (Carthamus tinctorius), the thorns and stems of a variety of sorghum plant called Kao-liang, and the wood of the sappanwood tree. For pigments, they used cinnabar, which produced the famous vermillion or "Chinese red" of Chinese lacquerware.[67]:111

Red played an important role in Chinese philosophy. It was believed that the world was composed of five elements: metal, wood, water, fire and earth, and that each had a color. Red was associated with fire. Each Emperor chose the color that his fortune-tellers believed would bring the most prosperity and good fortune to his reign. During the Zhou, Han, Jin, Song and Ming Dynasties, red was considered a noble color, and it was featured in all court ceremonies, from coronations to sacrificial offerings, and weddings.[4]:26

Red was also a badge of rank. During the Song dynasty (906–1279), officials of the top three ranks wore purple clothes; those of the fourth and fifth wore bright red; those of the sixth and seventh wore green; and the eighth and ninth wore blue. Red was the color worn by the royal guards of honor, and the color of the carriages of the imperial family. When the imperial family traveled, their servants and accompanying officials carried red and purple umbrellas. Of an official who had talent and ambition, it was said "he is so red he becomes purple."[4]:26

Red was also featured in Chinese Imperial architecture. In the Tang and Song Dynasties, gates of palaces were usually painted red, and nobles often painted their entire mansion red. One of the most famous works of Chinese literature, A Dream of Red Mansions by Cao Xueqin (1715–63), was about the lives of noble women who passed their lives out of public sight within the walls of such mansions. In later dynasties red was reserved for the walls of temples and imperial residences. When the Manchu rulers of the Qing Dynasty conquered the Ming and took over the Forbidden City and Imperial Palace in Beijing, all the walls, gates, beams and pillars were painted in red and gold.[4]:36-37

Red is not often used in traditional Chinese paintings, which are usually black ink on white paper with a little green sometimes added for trees or plants; but the round or square seals which contain the name of the artist are traditionally red.

Woven silk, Western Han Dynasty

Woven silk from the Western Han Dynasty, 2nd century BC

Gaozong Of Song

the Emperor Gaozong of Song (1127–62 AD), wearing red, the color his astrologers considered most auspicious for his reign

Meridan Gate

The Meridan Gate of the Forbidden City in Beijing. Walls, columns, windows and gates of palaces and temples were traditionally painted red.

Red lacquer tray with gold engraving, Song Dynasty

A red lacquerware tray with engraved gold foil decoration (12–13th century), from the Song dynasty

Detail of The Emperor's Approach, Xuande period

The red coach of the Ming dynasty's Xuande Emperor (1425–1435), pulled by elephants

Anonymous-Astana Graves Dancer

Dancer of the Tang dynasty, from the Astana Tombs

Modern history

In the 16th and 17th centuries

In Renaissance painting, red was used to draw the attention of the viewer; it was often used as the color of the cloak or costume of Christ, the Virgin Mary, or another central figure. In Venice, Titian was the master of fine reds, particularly vermilion; he used many layers of pigment mixed with a semi-transparent glaze, which let the light pass through, to create a more luminous color.

During the Renaissance trade routes were opened to the New World, to Asia and the Middle East, and new varieties of red pigment and dye were imported into Europe, usually through Venice, Genoa or Seville, and Marseille. Venice was the major depot importing and manufacturing pigments for artists and dyers from the end of the 15th century; the catalog of a Venetian Vendecolori, or pigment seller, from 1534 included vermilion and kermes.[68] [69]

There were guilds of dyers who specialized in red in Venice and other large Europeans cities. The Rubia plant was used to make the most common dye; it produced an orange-red or brick red color used to dye the clothes of merchants and artisans. For the wealthy, the dye used was kermes, made from a tiny scale insect which fed on the branches and leaves of the oak tree. For those with even more money there was Polish Cochineal; also known as Kermes vermilio or "Blood of Saint John", which was made from a related insect, the Margodes polonicus. It made a more vivid red than ordinary Kermes. The finest and most expensive variety of red made from insects was the "Kermes" of Armenia (Armenian cochineal, also known as Persian kirmiz), made by collecting and crushing Porphyophora hamelii, an insect which lived on the roots and stems of certain grasses. The pigment and dye merchants of Venice imported and sold all of these products and also manufactured their own color, called Venetian red, which was considered the most expensive and finest red in Europe. Its secret ingredient was arsenic, which brightened the color.[54]

But early in the 16th century, a brilliant new red appeared in Europe.[54]:64-100 When the Spanish conquistador Hernán Cortés and his soldiers conquered the Aztec Empire in 1519–21, they discovered slowly that the Aztecs had another treasure beside silver and gold; they had the tiny cochineal, a parasitic scale insect which lived on cactus plants, which, when dried and crushed, made a magnificent red. The cochineal in Mexico was closely related to the Kermes varieties of Europe, but unlike European Kermes, it could be harvested several times a year, and it was ten times stronger than the Kermes of Poland. It worked particularly well on silk, satin and other luxury textiles. In 1523 Cortes sent the first shipment to Spain. Soon cochineal began to arrive in European ports aboard convoys of Spanish galleons.[54]:64-100

At first the guilds of dyers in Venice and other cities banned cochineal to protect their local products, but the superior quality of cochineal dye made it impossible to resist. By the beginning of the 17th century it was the preferred luxury red for the clothing of cardinals, bankers, courtesans and aristocrats.[54]

The painters of the early Renaissance used two traditional lake pigments, made from mixing dye with either chalk or alum, kermes lake, made from kermes insects, and madder lake, made from the rubia tinctorum plant. With the arrival of cochineal, they had a third, carmine, which made a very fine crimson, though it had a tendency to change color if not used carefully. It was used by almost all the great painters of the 15th and 16th centuries, including Rembrandt, Vermeer, Rubens, Anthony van Dyck, Diego Velázquez and Tintoretto. Later it was used by Thomas Gainsborough, Seurat and J.M.W. Turner.[54]:102-05

Tizian 041

The Assumption, by Titian (1516–18). The figures of God, the Virgin Mary and two apostles are highlighted by their vermilion red costumes.

Elizabeth I Steven Van Der Meulen

The young Queen Elizabeth I (here in about 1563) liked to wear bright reds, before she adopted the more sober image of the "Virgin Queen". Her satin gown was probably dyed with kermes.

The Wedding Dance

The Wedding Dance (1566), by Pieter Bruegel the Elder. In Renaissance Flanders, people of all social classes wore red at celebrations. The dye came from the root of the madder plant, which tended toward orange.

Jan Vermeer van Delft 006

Woman with a wine glass, by Johannes Vermeer (1659–60). Vermeer used different shades and tints of vermilion to paint the red skirt, then glazed it with madder lake to make a more luminous color.

Aztecheaddress

Dyed feather headdress from the Aztec people of Mexico and Central America. For red they used cochineal, a brilliant scarlet dye made from insects.

Indian collecting cochineal

A native of Central America collecting cochineal insects from a cactus to make red dye (1777). From the 16th until the 19th century, it was a highly profitable export from Spanish Mexico to Europe.

Rembrandt Harmensz. van Rijn - Portret van een paar als oudtestamentische figuren, genaamd 'Het Joodse bruidje' - Google Art Project

Rembrandt used carmine lake, made of cochineal, to paint the skirt of the bride in the painting known as The Jewish bride (1665–69).

Louis XIV of France

The red heels of the shoes of King Louis XIV of France were discreet symbols of his royal status.

In the 18th and 19th centuries

During the French Revolution, the Jacobins and other more radical parties adopted the red flag; it was taken from red flags hoisted by the French government to declare a state of siege or emergency. Many of them wore a red Phrygian cap, or liberty cap, modeled after the caps worn by freed slaves in Ancient Rome. During the height of the Reign of Terror, Women wearing red caps gathered around the guillotine to celebrate each execution. They were called the "Furies of the guillotine". The guillotines used during the Reign of Terror in 1792 and 1793 were painted red, or made of red wood. During the Reign of Terror a statue of a woman titled liberty, painted red, was placed in the square in front of the guillotine. After the end of the Reign of Terror, France went back to the blue, white and red tricolor, whose red was taken from the red and blue colors of the city of Paris, and was the traditional color of Saint Denis, the Christian martyr and patron saint of Paris.

In the mid-19th century, red became the color of a new political and social movement, socialism. It became the most common banner of the worker's movement, of the French Revolution of 1848, of the Paris Commune in 1870, and of socialist parties across Europe. (see red flags and revolution section below).

As the Industrial Revolution spread across Europe, chemists and manufacturers sought new red dyes that could be used for large-scale manufacture of textiles. One popular color imported into Europe from Turkey and India in the 18th and early 19th century was Turkey red, known in France as rouge d'Adrinople. Beginning in the 1740s, this bright red color was used to dye or print cotton textiles in England, the Netherlands and France. Turkey red used madder as the colorant, but the process was longer and more complicated, involving multiple soaking of the fabrics in lye, olive oil, sheep's dung, and other ingredients. The fabric was more expensive but resulted in a fine bright and lasting red, similar to carmine, perfectly suited to cotton. The fabric was widely exported from Europe to Africa, the Middle East and America. In 19th-century America, it was widely used in making the traditional patchwork quilt.[70]

In 1826, the French chemist Pierre-Jean Robiquet discovered the organic compound alizarin, the powerful coloring ingredient of the madder root, the most popular red dye of the time. In 1868, German chemists Carl Graebe and Liebermann were able to synthesize alizarin, and to produce it from coal tar. The synthetic red was cheaper and more lasting than the natural dye, and the plantation of madder in Europe and import of cochineal from Latin America soon almost completely ceased.

The 19th century also saw the use of red in art to create specific emotions, not just to imitate nature.[71] It saw the systematic study of color theory, and particularly the study of how complementary colors such as red and green reinforced each other when they were placed next to each other. These studies were avidly followed by artists such as Vincent van Gogh. Describing his painting, The Night Cafe, to his brother Theo in 1888, Van Gogh wrote: "I sought to express with red and green the terrible human passions. The hall is blood red and pale yellow, with a green billiard table in the center, and four lamps of lemon yellow, with rays of orange and green. Everywhere it is a battle and antithesis of the most different reds and greens."[72]

Bonnet Phrygien

A Phrygian cap, or liberty cap, was worn by the supporters of the French Revolution of 1789.

Les furies de guillotine

During the Reign of Terror during the later French Revolution, the "Furies of the Guillotine" cheered on each execution.

Horace Vernet-Barricade rue Soufflot

Red flag over a barricade on Rue Soufflot in Paris during the French Revolution of 1848.

Vincent Willem van Gogh 076

The Night Cafe, (1888), by Vincent van Gogh, used red and green to express what Van Gogh called "the terrible human passions."

In the 20th and 21st centuries

In the 20th century, red was the color of Revolution; it was the color of the Bolshevik Revolution in 1917 and of the Chinese Revolution of 1949, and later of the Cultural Revolution. Red was the color of Communist Parties from Eastern Europe to Cuba to Vietnam.

In the late 19th and early 20th century, the German chemical industry invented two new synthetic red pigments: cadmium red, which was the color of natural vermilion, and mars red, which was a synthetic red ochre, the color of the very first natural red pigment.

The French painter Henri Matisse (1869–1954) was one of the first prominent painters to use the new cadmium red. He even tried, without success, to persuade the older and more traditional Renoir, his neighbor in the south of France, to switch from vermilion to cadmium red.[73]:440

Matisse was also one of the first 20th-century artists to make color the central element of the painting, chosen to evoke emotions. "A certain blue penetrates your soul", he wrote. "A certain red affects your blood pressure."[73]:437 He also was familiar with the way that complementary colors, such as red and green, strengthened each other when they were placed next to each other. He wrote, "My choice of colors is not based on scientific theory; it is based on observation, upon feelings, upon the real nature of each experience ... I just try to find a color which corresponds to my feelings."[73]:440

Later in the century, the American artist Mark Rothko (1903–70) also used red, in even simpler form, in blocks of dark, somber color on large canvases, to inspire deep emotions. Rothko observed that color was "only an instrument;" his interest was "in expressing human emotions tragedy, ecstasy, doom, and so on."[74]

Rothko also began using the new synthetic pigments, but not always with happy results. In 1962 he donated to Harvard University a series of large murals of the Passion of Christ whose predominant colors were dark pink and deep crimson. He mixed mostly traditional colors to make the pink and crimson; synthetic ultramarine, cerulean blue, and titanium white, but he also used two new organic reds, Naphtol and Lithol. The Naphtol did well, but the Lithol slowly changed color when exposed to light. Within five years the deep pinks and reds had begun to turn light blue, and by 1979 the paintings were ruined and had to be taken down.[73]:475-76

Bathing of a Red Horse (Petrov-Vodkin)

Bathing of a Red Horse, by the Russian symbolist painter Kuzma Petrov-Vodkin (1912), used a bright red horse to surprise and shock viewers. It provoked a furious discussion among Russian critics.

RothkoFourDarksRed

Four Darks in Red by Mark Rothko (1958). The somber dark reds were chosen to inspire deep human emotions.

Symbolism

Courage and sacrifice

Surveys show that red is the color most associated with courage.[5]:43 In western countries red is a symbol of martyrs and sacrifice, particularly because of its association with blood.[64] Beginning in the Middle Ages, the Pope and Cardinals of the Roman Catholic Church wore red to symbolize the blood of Christ and the Christian martyrs. The banner of the Christian soldiers in the First Crusade was a red cross on a white field, the St. George's Cross. According to Christian tradition, Saint George was a Roman soldier who was a member of the guards of the Emperor Diocletian, who refused to renounce his Christian faith and was martyred. The Saint George's Cross became the Flag of England in the 16th century, and now is part of the Union Flag of the United Kingdom, as well as the Flag of the Republic of Georgia.[54]:36

In 1587, Mary, Queen of Scots, accused of treason against Queen Elizabeth I, wore a red shirt at her execution, to proclaim that she was an innocent martyr.[54]:32

The Thin Red Line was a famous incident in the Battle of Balaclava (1854) during the Crimean War, when a thin line of Scottish Highlander infantry, assisted by Royal Marines and Turkish infantrymen, repulsed a Russian cavalry charge. It was widely reported in the British press as an example of courage in the face of overwhelming odds and became a British military legend.

In the 19th-century novel The Red Badge of Courage by Stephen Crane, a story about the American Civil War, the red badge was the blood from a wound, by which a soldier could prove his courage.[75]

BoschTheCrucifixionOfStJulia

The Crucified Martyr (Saint Julia) by the Dutch artist Hieronymus Bosch. Saint Julia wears red, the traditional color of Christian martyrs.

Innozenz3

Roman Catholic Popes wear red as the symbol of the blood of Christ. This is Pope Innocent III, in about 1219.

Paolo Uccello 050

Saint George and the Dragon, by Paolo Uccello (1456–60). He wears the Saint George's Cross as a cape, which was also the banner of Milan.

Robert Gibb - The Thin Red Line

Robert Gibb's 1881 painting, The Thin Red Line, depicting The Thin Red Line at the Battle of Balaclava (1854), when a line of the Scottish Highland infantry repulsed a Russian cavalry charge. The name was given by the British press as a symbol of courage against the odds.

Poppies in the Sunset on Lake Geneva

The red poppy flower is worn on Remembrance Day in Commonwealth countries to honor soldiers who died in the First World War.

Courtly love, the red rose, and Saint Valentine's Day

Red is the color most commonly associated with love, followed at a great distance by pink.[76] It the symbolic color of the heart and the red rose, is closely associated with romantic love or courtly love and Saint Valentine's Day. Both the Greeks and the Hebrews considered red a symbol of love as well as sacrifice.[77]

The Roman de la Rose, the Romance of the Rose, a thirteenth-century French poem, was one of the most popular works of literature of the Middle Ages. It was the allegorical search by the author for a red rose in an enclosed garden, symbolizing the woman he loved, and was a description of love in all of its aspects.[78] Later, in the 19th century, British and French authors described a specific language of flowers – giving a single red rose meant 'I love you'.[79]

Saint Valentine, a Roman Catholic Bishop or priest who was martyred in about 296 AD, seems to have had no known connection with romantic love, but the day of his martyrdom on the Roman Catholic calendar, Saint Valentine's Day (February 14), became, in the 14th century, an occasion for lovers to send messages to each other. In recent years the celebration of Saint Valentine' s day has spread beyond Christian countries to Japan and China and other parts of the world. The celebration of Saint Valentine's Day is forbidden or strongly condemned in many Islamic countries, including Saudi Arabia, Pakistan and Iran. In Saudi Arabia, in 2002 and 2011, religious police banned the sale of all Valentine's Day items, telling shop workers to remove any red items, as the day is considered a Christian holiday.[80]

Codex Manesse Bernger von Horheim

The Codex Manesse, a 14th-century collection of love songs. Red roses were symbol of courtly love.

Illustration for "Roman de la Rose"

Fifteenth-century Illustration from the Roman de la Rose, a thirteenth-century French poem about a search for a red rose symbolizing the poet's love.

Antique Valentine 1909 01

A valentine from 1909. The tradition of sending messages of love on February 14, Valentine's Day, dates back to the 14th century.

Leighton-God Speed!

God Speed!, a Victorian era painting by Edmund Leighton of a Lady giving a red token of love to her knight.

Happiness, celebration and ceremony

Red is the color most commonly associated with joy and well being.[5]:46 It is the color of celebration and ceremony. A red carpet is often used to welcome distinguished guests. Red is also the traditional color of seats in opera houses and theaters. Scarlet academic gowns are worn by new Doctors of Philosophy at degree ceremonies at Oxford University and other schools. In China, it is considered the color of good fortune and prosperity, and it is the color traditionally worn by brides. In Christian countries, it is the color traditionally worn at Christmas by Santa Claus, because in the 4th century the historic Saint Nicholas was the Greek Christian Bishop of Myra, in modern-day Turkey, and bishops then dressed in red.[81]

President Barack Obama meets with Prime Minister Manmohan Singh

President Barack Obama and Prime Minister Manmohan Singh of India on a red carpet at the White House.

Vienna Opera House Interior

Seats in opera houses and theaters are traditionally red. This is the Opera House in Vienna.

Oxfordceremony

Scarlet academic gowns are worn by new Doctors of Philosophy at a degree ceremony at Oxford University.

China-Shanghai-YuGarden-the Lantern Festival-2012 1828

In China, red is the color of happiness and celebration. The Lantern Festival in Shanghai.

Jonathan G Meath portrays Santa Claus

Santa Claus traditionally wears red, because the original Saint Nicholas was a bishop of the Greek Christian church in the 4th century.

Hatred, anger, aggression, passion, heat and war

While red is the color most associated with love, it also the color most frequently associated with hatred, anger, aggression and war. People who are angry are said to "see red." Red is the color most commonly associated with passion and heat. In ancient Rome, red was the color of Mars, the god of war—the planet Mars was named for him because of its red color.[5]:42, 53

Warning and danger

Red is the traditional color of warning and danger. In the Middle Ages, a red flag announced that the defenders of a town or castle would fight to defend it, and a red flag hoisted by a warship meant they would show no mercy to their enemy. In Britain, in the early days of motoring, motor cars had to follow a man with a red flag who would warn horse-drawn vehicles, before the Locomotives on Highways Act 1896 abolished this law. In automobile races, the red flag is raised if there is danger to the drivers. In international football, a player who has made a serious violation of the rules is shown a red penalty card and ejected from the game.[82]

Several studies have indicated that red carries the strongest reaction of all the colors, with the level of reaction decreasing gradually with the colors orange, yellow, and white, respectively.[83][84] For this reason, red is generally used as the highest level of warning, such as threat level of terrorist attack in the United States. In fact, teachers at a primary school in the UK have been told not to mark children's work in red ink because it encourages a "negative approach".[85]

Red is the international color of stop signs and stop lights on highways and intersections. It was standardized as the international color at the Vienna Convention on Road Signs and Signals of 1968. It was chosen partly because red is the brightest color in daytime (next to orange), though it is less visible at twilight, when green is the most visible color. Red also stands out more clearly against a cool natural backdrop of blue sky, green trees or gray buildings. But it was mostly chosen as the color for stoplights and stop signs because of its universal association with danger and warning.[5]:54 The 1968 Vienna Convention on Road Signs and Signals of 1968 uses red color also for the margin of danger warning sign, give way signs and prohibitory signs, following the previous German-type signage (established by Verordnung über Warnungstafeln für den Kraftfahrzeugverkehr in 1927).

Vienna Convention road sign B2a

The standard international stop sign, following the Vienna Convention on Road Signs and Signals of 1968

Stop in Iran

A stop sign in Iran

2009-3-14 ManUtd vs LFC Red Card Vidic

Footballer Nemanja Vidić is shown a red card and ejected from a soccer match

Red typhoon alert

A red Chinese typhoon alert sign

Hsas-chart with header

Red is the color of a severe terrorist threat level in the United States, under the Homeland Security Advisory System.

AU Fire Danger Indicator

Red is the color of a severe fire danger in Australia; new black/red stripes are an even more catastrophic hazard.

Signal Home & Distant Semaphore RYG

Red is the color of a UK Railway "Home" signal; the white stripe helps recognition against dark backgrounds.

The color that attracts attention

Magdalena Frackowiak
Fashion model Magdalena Frackowiak at Paris Fashion Week (Fall 2011)

Red is the color that most attracts attention. Surveys show it is the color most frequently associated with visibility, proximity, and extroverts. It is also the color most associated with dynamism and activity.[5]:48, 58

Red is used in modern fashion much as it was used in Medieval painting; to attract the eyes of the viewer to the person who is supposed to be the center of attention. People wearing red seem to be closer than those dressed in other colors, even if they are actually the same distance away.[5]:48, 58 Monarchs, wives of presidential candidates and other celebrities often wear red to be visible from a distance in a crowd. It is also commonly worn by lifeguards and others whose job requires them to be easily found.

Because red attracts attention, it is frequently used in advertising, though studies show that people are less likely to read something printed in red because they know it is advertising, and because it is more difficult visually to read than black and white text.[5]:60

Seduction, sexuality and sin

De Wallen
De Wallen, Amsterdam's red-light district; red is the sex industry's preferred color in many cultures, due to being strongly associated with passion, love and sexuality.[5]:39-63

Red by a large margin is the color most commonly associated with seduction, sexuality, eroticism and immorality, possibly because of its close connection with passion and with danger.[5]:55

Red was long seen as having a dark side, particularly in Christian theology. It was associated with sexual passion, anger, sin, and the devil.[86] In the Old Testament of the Bible, the Book of Isaiah said: "Though your sins be as scarlet, they shall be white as snow."[87] In the New Testament, in the Book of Revelation, the Antichrist appears as a red monster, ridden by a woman dressed in scarlet, known as the Whore of Babylon:

"So he carried me away in the spirit into the wilderness: and I saw a woman sit upon a scarlet coloured beast, full of names of blasphemy, having seven heads and ten horns. "And the woman was arrayed in purple and scarlet colour, and decked with gold and precious stones and pearls, having a golden cup in her hand full of abominations and filthiness of her fornication: "And upon her forehead was a name written a mystery: Babylon the Great, the Mother of Harlots and of all the abominations of the earth: And I saw the woman drunken with the blood of the saints, and with the blood of the martyrs of Jesus.[88]

Satan is often depicted as colored red and/or wearing a red costume in both iconography and popular culture.[89] By the 20th century, the devil in red had become a folk character in legends and stories. In 1915, Irving Berlin wrote a song, At the Devil's Ball, and the devil in red appeared more often in cartoons and movies than in religious art.

In 17th-century New England, red was associated with adultery. In the 1850 novel by Nathaniel Hawthorne, The Scarlet Letter, set in a Puritan New England community, a woman is punished for adultery with ostracism, her sin represented by a red letter 'A' sewn onto her clothes.[90]

Red is still commonly associated with prostitution. Prostitutes in many cities were required to wear red to announce their profession, and houses of prostitution displayed a red light. Beginning in the early 20th century, houses of prostitution were allowed only in certain specified neighborhoods, which became known as red-light districts. Large red-light districts are found today in Bangkok and Amsterdam.

In Roman Catholicism, red represents wrath, one of the seven deadly sins.

In both Christian and Hebrew tradition, red is also sometimes associated with murder or guilt, with "having blood on one's hands", or "being caught red-handed.

Whore of Babylon (XIV)

The Whore of Babylon, depicted in a 14th-century French illuminated manuscript. The woman appears attractive, but is wearing red under her blue garment.

Henri de Toulouse-Lautrec 057

Reine de joie, (Queen of Joy), a book cover illustration by Henri de Toulouse-Lautrec (1892) about a Paris prostitute

At the Devil's Ball 1

Sheet music for "At the Devil's Ball", by Irving Berlin, United States, 1915.

Amsterdam red light district 24-7-2003

The red-light district in Amsterdam (2003).

Red lipstick (photo by weglet)

Red lipstick has been worn by women as a cosmetic since ancient times. It was worn by Cleopatra, Queen Elizabeth I, and films stars such as Elizabeth Taylor and Marilyn Monroe.

In different cultures and traditions

In China, red (simplified Chinese: ; traditional Chinese: ; pinyin: hóng) is the symbol of fire and the south (both south in general and Southern China specifically). It carries a largely positive connotation, being associated with courage, loyalty, honor, success, fortune, fertility, happiness, passion, and summer.[91][92] In Chinese cultural traditions, red is associated with weddings (where brides traditionally wear red dresses) and red paper is frequently used to wrap gifts of money or other objects. Special red packets (simplified Chinese: 红包; traditional Chinese: 紅包; pinyin: hóng bāo in Mandarin or lai see in Cantonese) are specifically used during Chinese New Year celebrations for giving monetary gifts. On the more negative side, obituaries are traditionally written in red ink, and to write someone's name in red signals either cutting them out of one's life, or that they have died.[92] Red is also associated with either the feminine or the masculine (yin and yang respectively), depending on the source.[92][93] The Little Red Book, a collection of quotations from Chairman Mao Tse-Tung, founding father of the People's Republic of China (PRC), was published in 1966 and widely distributed thereafter.

In Japan, red is a traditional color for a heroic figure.[94] In the Indian subcontinent, red is the traditional color of bridal dresses, and is frequently represented in the media as a symbolic color for married women.[95] The color is associated with purity, as well as with sexuality in marital relationships through its connection to heat and fertility.[96] It is also the color of wealth, beauty, and the goddess Lakshmi.[64]

In Central Africa, Ndembu warriors rub themselves with red paint during celebrations. Since their culture sees the color as a symbol of life and health, sick people are also painted with it. Like most Central African cultures, the Ndembu see red as ambivalent, better than black but not as good as white.[97] In other parts of Africa, however, red is a color of mourning, representing death.[98] Because red bears are associated with death in many parts of Africa, the Red Cross has changed its colors to green and white in parts of the continent.[99]

The early Ottoman Turks led by the first Ottoman Sultan, Osman I, carried red banners symbolizing sovereignty, Ghazis and Sufism, until, according to legend, he saw a new red flag in his dream inlaid with a crescent.

Wedding dresses

In many Asian countries, red is the traditional color for a wedding dress today, symbolizing joy and good fortune.

  • In India, brides traditionally wear a red sari, called the sari of blood, offered by their father, signifying that his duties as a father are transferred to the new husband, and as a symbol of his wish for her to have children. Once married, the bride will wear a sari with a red border, changing it to a white sari if her husband dies. In Pakistan and India, some brides traditionally also have their hands and feet painted red with henna by the family of their new spouse, to bring happiness and signify their new status.[67]:95
Traditional chinese wedding

The bride at a traditional Chinese wedding dresses in red, the color of happiness and good fortune.

Rajput bride

Wedding dress in Rajput, India.

Red Ao dai

Wedding dress from Vietnam.

Uchikake

A red wedding kimono, or uchikake, from Japan. Brides in Japan can wear either a white kimono or bright colors.

Henna on a Muslim bride's hands, Madurai, Tamil Nadu, India

In India and Pakistan, brides traditionally have their hands and feet decorated with red henna.

In religion

  • In Christianity, red is associated with the blood of Christ and the sacrifice of martyrs. In the Roman Catholic Church it is also associated with pentecost and the Holy Spirit. Since 1295, it is the color worn by Cardinals, the senior clergy of the Roman Catholic Church. Red is the liturgical color for the feasts of martyrs, representing the blood of those who suffered death for their faith. It is sometimes used as the liturgical color for Holy Week, including Palm Sunday and Good Friday, although this is a modern (20th-century) development. In Catholic practice, it is also the liturgical color used to commemorate the Holy Spirit (for this reason it is worn at Pentecost and during Confirmation masses). Because of its association with martyrdom and the Spirit, it is also the color used to commemorate the Apostles (except for the Apostle St. John, who was not martyred, where white is used), and as such, it is used to commemorate bishops, who are the successors of the Apostles (for this reason, when funeral masses are held for bishops, cardinals, or popes, red is used instead of the white that would ordinarily be used).
  • In Buddhism, red is one of the five colors which are said to have emanated from the Buddha when he attained enlightenment, or nirvana. It is particularly associated with the benefits of the practice of Buddhism; achievement, wisdom, virtue, fortune and dignity. It was also believed to have the power to resist evil. In China red was commonly used for the walls, pillars, and gates of temples.
  • In the Shinto religion of Japan, the gateways of temples, called torii, are traditionally painted vermilion red and black. The torii symbolizes the passage from the profane world to a sacred place. The bridges in the gardens of Japanese temples are also painted red (and usually only temple bridges are red, not bridges in ordinary gardens), since they are also passages to sacred places. Red was also considered a color which could expel evil and disease.
Itsukushima torii angle

A Shinto torii at Itsukushima, Japan

John Paul II funeral long shot

Cardinals of the Roman Catholic Church at the funeral of Pope John Paul II

Debating Monks

Buddhist monks in Tibet

Ravi Varma-Lakshmi

In Hinduism, red is associated with Lakshmi, the goddess of wealth and embodiment of beauty.

Muharram in cities and villages of Iran-342 16 (160)

Red flags in a celebration of Muharram in Iran.

Military uses

NATO Military Symbols for Land Based Systems uses red to denote hostile forces, hence the terms "red team" and "Red Cell" to denote challengers during exercises.[100]

The red uniform

The red military uniform was adopted by the English Parliament's New Model Army in 1645, and was still worn as a dress uniform by the British Army until the outbreak of the First World War in August 1914. Ordinary soldiers wore red coats dyed with madder, while officers wore scarlet coats dyed with the more expensive cochineal.[54]:168-69 This led to British soldiers being known as red coats.

In the modern British army, scarlet is still worn by the Foot Guards, the Life Guards, and by some regimental bands or drummers for ceremonial purposes. Officers and NCOs of those regiments which previously wore red retain scarlet as the color of their "mess" or formal evening jackets. The Royal Gibraltar Regiment has a scarlet tunic in its winter dress.

Scarlet is worn for some full dress, military band or mess uniforms in the modern armies of a number of the countries that made up the former British Empire. These include the Australian, Jamaican, New Zealand, Fijian, Canadian, Kenyan, Ghanaian, Indian, Singaporean, Sri Lankan and Pakistani armies.[101]

The musicians of the United States Marine Corps Band wear red, following an 18th-century military tradition that the uniforms of band members are the reverse of the uniforms of the other soldiers in their unit. Since the US Marine uniform is blue with red facings, the band wears the reverse.

Red Serge is the uniform of the Royal Canadian Mounted Police, created in 1873 as the North-West Mounted Police, and given its present name in 1920. The uniform was adapted from the tunic of the British Army. Cadets at the Royal Military College of Canada also wear red dress uniforms.

The Brazilian Marine Corps wears a red dress uniform.

Officer and Private, 40th Foot, 1815

Officer and soldier of the British Army, (1815).

Garde nationale bulgare

The scarlet uniform of the National Guards Unit of Bulgaria

Forma-2g

The Brazilian Marine Corps wears a dress uniform called A Garança.

Indian Army-Rajput regiment.jpeg

Soldiers of the Rajput Regiment of the Indian Army

In sports

The first known team sport to feature red uniforms was chariot racing during the late Roman Empire. The earliest races were between two chariots, one driver wearing red, the other white. Later, the number of teams was increased to four, including drivers in light green and sky blue. Twenty-five races were run in a day, with a total of one hundred chariots participating.[102]

Today many sports teams throughout the world feature red on their uniforms. Along with blue, red is the most commonly used non-white color in sports. Numerous national sports teams wear red, often through association with their national flags. A few of these teams feature the color as part of their nickname such as Spain (with their association football (soccer) national team nicknamed La Furia Roja or "The Red Fury") and Belgium (whose football team bears the nickname Rode Duivels or "Red Devils").

In club association football (soccer), red is a commonly used color throughout the world. A number of teams' nicknames feature the color. A red penalty card is issued to a player who commits a serious infraction: the player is immediately disqualified from further play and his team must continue with one less player for the game's duration.

In rugby union, Ireland's Munster rugby, New Zealand's Canterbury provincial team and the Crusaders Super 14 rugby side wear red as a major color in their playing strips.

Rosso Corsa is the red international motor racing color of cars entered by teams from Italy. Since the 1920s Italian race cars of Alfa Romeo, Maserati, Lancia, and later Ferrari and Abarth have been painted with a color known as rosso corsa ("racing red"). National colors were mostly replaced in Formula One by commercial sponsor liveries in 1968, but unlike most other teams, Ferrari always kept the traditional red, although the shade of the color varies.

The color is commonly used for professional sports teams in Canada and the United States with eleven Major League Baseball teams, eleven National Hockey League teams, seven National Football League teams and eleven National Basketball Association teams prominently featuring some shade of the color. The color is also featured in the league logos of Major League Baseball, the National Football League and the National Basketball Association.[103] In the National Football League, a red flag is thrown by the head coach to challenge a referee's decision during the game. During the 1950s when red was strongly associated with communism in the United States, the modern Cincinnati Reds team was known as the "Redlegs" and the term was used on baseball cards. After the red scare faded, the team was known as the "Reds" again.[104]

In boxing, red is often the color used on a fighter's gloves. George Foreman wore the same red trunks he used during his loss to Muhammad Ali when he defeated Michael Moorer 20 years later to regain the title he lost. Boxers named or nicknamed "red" include Red Burman, Ernie "Red" Lopez, and his brother Danny "Little Red" Lopez.

Winner of a Roman chariot race

Ancient Roman mosaic of the winner of a chariot race, wearing the colors of the red team.

RS Redz

Both the Cleveland Indians and the Boston Red Sox wear red.

Tamashiro-kata-Tampere-2006

In martial arts, a red belt shows a high degree of proficiency, second only, in some schools, to the black belt.

Alfa Romeo 33 SC 12 Sovralimentata 1977 red vr TCE

An Alfa Romeo Grand Prix car in 1977, painted Rosso Corsa, ("racing red"), the traditional racing color of Italy from the 1920s until the late 1960s.

On flags

Red is one of the most common colors used on national flags. The use of red has similar connotations from country to country: the blood, sacrifice, and courage of those who defended their country; the sun and the hope and warmth it brings; and the sacrifice of Christ's blood (in some historically Christian nations) are a few examples. Red is the color of the flags of several countries that once belonged to the British Empire. The British flag bears the colors red, white and blue; it includes the cross of Saint George, patron saint of England, and the saltire of Saint Patrick, patron saint of Ireland, both of which are red on white.[105]:10 The flag of the United States bears the colors of Britain,[106] the colors of the French tricolore include red as part of the old Paris coat of arms, and other countries' flags, such as those of Australia, New Zealand, and Fiji, carry a small inset of the British flag in memory of their ties to that country.[105]:13-20 Many former colonies of Spain, such as Mexico, Colombia, Costa Rica, Cuba, Ecuador, Panama, Peru, Puerto Rico and Venezuela, also feature red-one of the colors of the Spanish flag-on their own banners. Red flags are also used to symbolize storms, bad water conditions, and many other dangers. Navy flags are often red and yellow. Red is prominently featured in the flag of the United States Marine Corps.

The red on the flag of Nepal represents the floral emblem of the country, the rhododendron.

Red, blue, and white are also the Pan-Slavic colors adopted by the Slavic solidarity movement of the late nineteenth century. Initially these were the colors of the Russian flag; as the Slavic movement grew, they were adopted by other Slavic peoples including Slovaks, Slovenes, and Serbs. The flags of the Czech Republic and Poland use red for historic heraldic reasons (see Coat of arms of Poland and Coat of arms of the Czech Republic) & not due to Pan-Slavic connotations. In 2004 Georgia adopted a new white flag, which consists of four small and one big red cross in the middle touching all four sides.

Red, white, and black were the colors of the German Empire from 1870 to 1918, and as such they came to be associated with German nationalism. In the 1920s they were adopted as the colors of the Nazi flag. In Mein Kampf, Hitler explained that they were "revered colors expressive of our homage to the glorious past." The red part of the flag was also chosen to attract attention – Hitler wrote: "the new flag ... should prove effective as a large poster" because "in hundreds of thousands of cases a really striking emblem may be the first cause of awakening interest in a movement." The red also symbolized the social program of the Nazis, aimed at German workers.[107] Several designs by a number of different authors were considered, but the one adopted in the end was Hitler's personal design.[108]

Red, white, green and black are the colors of Pan-Arabism and are used by many Arab countries.[109]

Red, gold, green, and black are the colors of Pan-Africanism. Several African countries thus use the color on their flags, including South Africa, Ghana, Senegal, Mali, Ethiopia, Togo, Guinea, Benin, and Zimbabwe. The Pan-African colors are borrowed from the flag of Ethiopia, one of the oldest independent African countries.[109][110] Rwanda, notably, removed red from its flag after the Rwandan Genocide because of red's association with blood.[111]

The flags of Japan and Bangladesh both have a red circle in the middle of different colored backgrounds. The flag of the Philippines has a red trapezoid on the bottom signifying blood, courage, and valor (also, if the flag is inverted so that the red trapezoid is on top and the blue at the bottom, it indicates a state of war). The flag of Singapore has a red rectangle on the top. The field of the flag of Portugal is green and red. The Ottoman Empire adopted several different red flags during the six centuries of its rule, with the successor Republic of Turkey continuing the 1844 Ottoman Flag.

Byzantine imperial flag, 14th century, square

The flag of the Byzantine Empire from 1260 to its fall in 1453

Flag of England

The St George's cross was the banner of the First Crusade, then, beginning in the 13th century, the flag of England. It is the red color (along with that of the Cross of Saint Patrick) in the flag of the United Kingdom, and, by adoption, of the red in the flag of the United States.

Flag of the United States (1776–1777)

The red stripes in the flag of the United States were adapted from the flag of the British East Indies Company. This is the Grand Union Flag, the first U.S. flag established by the Continental Congress.

Flag of Georgia

The Flag of Georgia also features the Saint George's Cross. It dates back to the banner of Medieval Georgia in the 5th century.

Flag of Canada

The maple leaf flag of Canada, adopted in 1965. The red color comes from the Saint George's Cross of England.

Flag of Cambodia

The national flag of Cambodia in its present form was originally adopted in 1948 and readopted in 1993, after the Constituent Assembly election in 1993 and restoration of the monarchy. Red color in the flag represents bravery.

Red flag and revolution

In the Middle Ages, ships in combat hoisted a long red streamer, called the Baucans, to signify a fight to the death.[112] In the 17th century, a red flag signalled defiance. A besieged castle or city would raise a red flag to tell the attackers that they would not surrender.[113][114]

The red flag appeared as a political symbol during the French Revolution, after the fall of Bastille. A law adopted by the new government on October 20, 1789 authorized the Garde Nationale to raise the red flag in the event of a riot, to signal that the Garde would imminently intervene. During a demonstration on the Champs de Mars on July 17, 1791, the Garde Nationale fired on the crowd, killed up to fifty people. The government was denounced by the more radical revolutionaries. In the words of his famous hymn, the Marseillaise, Rouget de Lisle wrote: "Against us they have raised the bloody flag of tyranny!" (Contre nous de la tyrannie, l'entendard sanglant est leve). Beginning in 1790, the most radical revolutionaries adopted the red flag themselves, to symbolize the blood of those killed in the demonstrations, and to call for the repression of those they considered counter-revolutionary.[115]

During the French Revolution, many in the Paris crowds also wore a red phrygian cap, a symbol of liberty, modeled after the caps worn in ancient Rome by freed slaves; but the colors of the Revolution finally became blue, white and red. The red in the French flag was taken from the emblem of the city of Paris, where it represented the city's patron saint, Saint Denis.

Karl Marx published the Communist Manifesto in February 1848, with little attention. However, a few days later the French Revolution of 1848 broke out, which replaced the monarchy of Louis Philippe with the Second French Republic. In June 1848, Paris workers, disenchanted with the new government, built barricades and raised red flags. The new government called in the French Army to put down the uprising, the first of many such confrontations between the army and the new worker's movements in Europe.

Red was also the color of the movement to unify Italy, led by Giuseppe Garibaldi. His followers were known as the camicie rosse, or (redshirts) during the fight for Italian Risorgimento in 1860.

In 1870, following the stunning defeat of the French Army by the Germans in the Franco-Prussian War, French workers and socialist revolutionaries seized Paris and created the Paris Commune. The Commune lasted for two months before it was crushed by the French Army, with much bloodshed. The original red banners of the Commune became icons of the socialist revolution; in 1921 members of the French Communist Party came to Moscow and presented the new Soviet government with one of the original Commune banners; it was placed (and is still in place) in the tomb of Vladimir Lenin, next to his open coffin.[116]

With the victory of the Bolsheviks in the Russian Revolution of 1917, the red flag, with a hammer to symbolize the workers and sickle to symbolize peasants, became the official flag of Russia, and, in 1923, of the Soviet Union. It remained so until the breakup of the Soviet Union in 1991.

After the Communist Party of China took power in 1949, the flag of China became a red flag with a large star symbolizing the Communist Party, and smaller stars symbolizing workers, peasants, the urban middle class and rural middle class. The flag of the Communist Party of China became a red banner with a hammer and sickle, similar to that on the Soviet flag. In the 1950s and 1960s, other Communist regimes such as Vietnam and Laos also adopted red flags. Some Communist countries, such as Cuba, chose to keep their old flags; and other countries used red flags which had nothing to do with Communism or socialism; the red flag of Nepal, for instance, represents the national flower.

Garde nationale mobile pendant les Journées de Juin

A French soldier takes down a red flag from the barricades during the Paris uprising of 1848.

Gravure La Commune de Paris

A poster from the Paris Commune (1871)

Demonstration on October 17, 1905 by Ilya Repin (adumbration 1906)

A demonstration in Moscow during the unsuccessful Russian Revolution of 1905, painted by Ilya Repin.

Kustodiev The Bolshevik

Red was the color of the Russian Revolution in 1917. The Bolshevik, painting by Boris Kustodiev (1920).

Flag of the Soviet Union

The flag of the Soviet Union (1923–91). The hammer symbolized workers, the sickle represented peasants, and the red star symbolized the Communist Party.

Flag of the People's Republic of China

The Flag of the People's Republic of China. Red symbolizes revolution, the large star is the Communist Party, and the smaller stars represent the working class, the peasants, and the urban middle class, the rural middle class, as described by Mao Zedong.

Use by political movements

Chinese honor guard in column 070322-F-0193C-014.JPEG
Honor guard of Chinese Army welcomes U.S. Defense Secretary to Beijing.

In 18th-century Europe, red was usually associated with the monarchy and with those in power. The Pope wore red, as did the Swiss Guards of the Kings of France, the soldiers of the British Army and the Danish Army.

The French Revolution saw red used by the Jacobins as a symbol of the martyrs of the Revolution. In the nineteenth century, with the Industrial Revolution and the rise of worker's movements, it became the color of socialism (especially the Marxist variant), and, with the Paris Commune of 1870, of revolution.

In the 20th century, red was the color first of the Russian Bolsheviks and then, after the success of the Russian Revolution of 1917, of Communist Parties around the world.

Red also became the color of many social democratic parties in Europe, including the Labour Party in Britain (founded 1900); the Social Democratic Party of Germany (whose roots went back to 1863) and the French Socialist Party, which dated back under different names, to 1879. The Socialist Party of America (1901–72) and the Communist Party USA (1919) both also chose red as their color.

Members of the Christian-Social People's Party in Liechtenstein (founded 1918) advocated an expansion of democracy and progressive social policies, and were often referred to disparagingly as "Reds" for their social liberal leanings and party colors.[117]

The Communist Party of China, founded in 1920, adopted the red flag and hammer and sickle emblem of the Soviet Union, which became the national symbols when the Party took power in China in 1949. Under Party leader Mao Zedong, the Party anthem became "The East Is Red",[118] and Mao Zedong himself was sometimes referred to as a "red sun".[119] During the Cultural Revolution in China, Party ideology was enforced by the Red Guards, and the sayings of Mao Zedong were published as a small red book in hundreds of millions of copies. Today the Communist Party of China claims to be the largest political party in the world, with eighty million members.[120]

Beginning in the 1960s and the 1970s, paramilitary extremist groups such as the Red Army Faction in Germany, the Japanese Red Army and the Shining Path Maoist movement in Peru used red as their color. But in the 1980s, some European socialist and social democratic parties, such as the Labour Party in Britain and the Socialist Party in France, moved away from the symbolism of the far left, keeping the red color but changing their symbol to a less-threatening red rose.

Red is used around the world by political parties of the left or center-left. In the United States, it is the color of the Communist Party USA, of the Social Democrats, USA, and in Puerto Rico, of the Popular Democratic Party of Puerto Rico.

In the United States, political commentators often refer to the "red states", which traditionally vote for Republican candidates in presidential elections, and "blue states", which vote for the Democratic candidate. This convention is relatively recent: before the 2000 presidential election, media outlets assigned red and blue to both parties, sometimes alternating the allocation for each election. Fixed usage was established during the 39-day recount following the 2000 election, when the media began to discuss the contest in terms of "red states" versus "blue states".[121]

Red state, blue state

A map of the U.S. showing the blue states, which voted for the Democratic candidate in all the last four presidential elections, and the red states, which voted for the Republican.

Social and special interest groups

Such names as Red Club (a bar), Red Carpet (a discothèque) or Red Cottbus and Club Red (event locations) suggest liveliness and excitement. The Red Hat Society is a social group founded in 1998 for women 50 and over. Use of the color red to call attention to an emergency situation is evident in the names of such organizations as the Red Cross (humanitarian aid), Red Hot Organization (AIDS support), and the Red List of Threatened Species (of IUCN). In reference to humans, term "red" is often used in the West to describe the indigenous peoples of the Americas.[122]

Idioms

Many idiomatic expressions exploit the various connotations of red:

Expressing emotion
  • "to see red" (to be angry or aggressive)
  • "to have red ears / a red face" (to be embarrassed)
  • "to paint the town red" (to have an enjoyable evening, usually with a generous amount of eating, drinking, dancing)
Giving warning
  • "to raise a red flag" (to signal that something is problematic)
  • "like a red rag to a bull" (to cause someone to be enraged)
  • "to be in the red" (to be losing money, from the accounting habit of writing deficits and losses in red ink)
Calling attention
  • "a red letter day" (a special or important event, from the medieval custom of printing the dates of saints' days and holy days in red ink.)
  • "to print in red ink" (for emphasis or easy identification)
  • "to lay out the red carpet" or "give red-carpet treatment" (to treat someone royally as a very special person)
  • "to catch someone red-handed" (in the act of doing something wrong, such with blood on his hands after a murder or poaching game)
Other idioms
  • "to tie up in red tape". In England red tape was used by lawyers and government officials to identify important documents. It became a term for excessive bureaucratic regulation. It was popularized in the 19th century by the writer Thomas Carlyle, who complained about "red-tapism".[123]
  • "red herring." A false clue that leads investigators off the track. Refers to the practice of using a fragrant smoked fish to distract hunting or tracking dogs from the track they are meant to follow.

Superstition

  • It is a common belief in the United States that red cars are stopped for speeding more often than other color cars. However, there is no statistical evidence that this is true. Many police departments have denied it, saying their officers stop drivers for their behavior, not the color of their cars. The one survey that was made on this subject in 1990 by a St. Petersburg, Florida newspaper showed that the number of speeding tickets given to drivers of red cars was about the same as the proportion of red cars on the road in the community.[124]

In film

Many film titles have included the color's name, such as:

See also

References

Notes and citations

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Bibliography

  • Broecke, Lara (2015). Cennino Cennini's Il Libro dell'Arte: a New English Translation and Commentary with italian Transcription. Archetype. ISBN 978-1-909492-28-8.
  • Barber, E. j. w. (1991). Prehistoric Textiles. Princeton University Press. ISBN 978-0-691-00224-8.
  • Greenfield, Amy Butler (2005). A Perfect Red. Editions Autrement (French translation). ISBN 978-2-7467-1094-8.
  • Ball, Philip (2001). Bright Earth, Art and the Invention of Colour. Hazan (French translation). ISBN 978-2-7541-0503-3.
  • Heller, Eva (2009). Psychologie de la couleur – Effets et symboliques. Pyramyd (French translation). ISBN 978-2-35017-156-2.
  • Chunling, Yan (2008). China Red. Beijing: Foreign Languages Press. ISBN 978-7-119-04531-3.
  • Pastoureau, Michel (2005). Le petit livre des couleurs. Editions du Panama. ISBN 978-2-7578-0310-3.
  • Gage, John (1993). Colour and Culture: Practice and Meaning from Antiquity to Abstraction. Thames and Hudson (Page numbers cited from French translation). ISBN 978-2-87811-295-5.
  • Varichon, Anne (2000). Couleurs – pigments et teintures dans les mains des peuples. Seuil. ISBN 978-2-02-084697-4.
  • Davies, Kevin M. (2004). Plant pigments and their manipulation. Wiley-Blackwell. p. 6. ISBN 978-1-4051-1737-1.
  • Hendrickson, Robert (1999). Encyclopedia of Word and Phrase Origins. Facts on File. p. 6. ISBN 978-0-8160-3266-2.
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  • Bomford, David (2000). A Closer Look – Colour. National Gallery Company, London. ISBN 978-1-85709-442-8.

External links

  • Media related to Red at Wikimedia Commons
  • The dictionary definition of red at Wiktionary
Anemia

Anemia is a decrease in the total amount of red blood cells (RBCs) or hemoglobin in the blood, or a lowered ability of the blood to carry oxygen. When anemia comes on slowly, the symptoms are often vague and may include feeling tired, weakness, shortness of breath or a poor ability to exercise. Anemia that comes on quickly often has greater symptoms, which may include confusion, feeling like one is going to pass out, loss of consciousness, or increased thirst. Anemia must be significant before a person becomes noticeably pale. Additional symptoms may occur depending on the underlying cause.The three main types of anemia are due to blood loss, decreased red blood cell production, and increased red blood cell breakdown. Causes of blood loss include trauma and gastrointestinal bleeding, among others. Causes of decreased production include iron deficiency, a lack of vitamin B12, thalassemia, and a number of neoplasms of the bone marrow. Causes of increased breakdown include a number of genetic conditions such as sickle cell anemia, infections like malaria, and certain autoimmune diseases. It can also be classified based on the size of red blood cells and amount of hemoglobin in each cell. If the cells are small, it is microcytic anemia. If they are large, it is macrocytic anemia while if they are normal sized, it is normocytic anemia. Diagnosis in men is based on a hemoglobin of less than 130 to 140 g/L (13 to 14 g/dL), while in women, it must be less than 120 to 130 g/L (12 to 13 g/dL). Further testing is then required to determine the cause.Certain groups of individuals, such as pregnant women, benefit from the use of iron pills for prevention. Dietary supplementation, without determining the specific cause, is not recommended. The use of blood transfusions is typically based on a person's signs and symptoms. In those without symptoms, they are not recommended unless hemoglobin levels are less than 60 to 80 g/L (6 to 8 g/dL). These recommendations may also apply to some people with acute bleeding. Erythropoiesis-stimulating medications are only recommended in those with severe anemia.Anemia is the most common blood disorder, affecting about a third of the global population. Iron-deficiency anemia affects nearly 1 billion people. In 2013, anemia due to iron deficiency resulted in about 183,000 deaths – down from 213,000 deaths in 1990. It is more common in women than men, during pregnancy, and in children and the elderly. Anemia increases costs of medical care and lowers a person's productivity through a decreased ability to work. The name is derived from Ancient Greek: ἀναιμία anaimia, meaning "lack of blood", from ἀν- an-, "not" and αἷμα haima, "blood".

Boston Red Sox

The Boston Red Sox are an American professional baseball team based in Boston, Massachusetts. The Red Sox compete in Major League Baseball (MLB) as a member club of the American League (AL) East division. The Red Sox have won nine World Series championships, tied for the third-most of any MLB team, and they have played in 13. Their most recent appearance and win was in 2018. In addition, they won the 1904 American League pennant, but were not able to defend their 1903 World Series championship when the New York Giants refused to participate in the 1904 World Series. Founded in 1901 as one of the American League's eight charter franchises, the Red Sox' home ballpark has been Fenway Park since 1912. The "Red Sox" name was chosen by the team owner, John I. Taylor, circa 1908, following the lead of previous teams that had been known as the "Boston Red Stockings", including the forerunner of the Atlanta Braves.

Boston was a dominant team in the new league, defeating the Pittsburgh Pirates in the first World Series in 1903 and winning four more championships by 1918. However, they then went into one of the longest championship droughts in baseball history, dubbed the "Curse of the Bambino" after its alleged inception due to the Red Sox' sale of Babe Ruth to the rival New York Yankees two years after their world championship in 1918, an 86-year wait before the team's sixth World Championship in 2004. The team's history during that period was punctuated with some of the most memorable moments in World Series history, including Enos Slaughter's "mad dash" in 1946, the "Impossible Dream" of 1967, Carlton Fisk's home run in 1975, and Bill Buckner's error in 1986. Following their victory in the 2018 World Series, they became the first team to win four World Series trophies in the 21st century, including championships in 2004, 2007, 2013 and 2018. Red Sox history has also been marked by the team's intense rivalry with the Yankees, arguably the fiercest and most historic in North American professional sports.The Boston Red Sox are owned by Fenway Sports Group, which also owns Liverpool F.C. of the Premier League in England. The Red Sox are consistently one of the top MLB teams in average road attendance, while the small capacity of Fenway Park prevents them from leading in overall attendance. From May 15, 2003 to April 10, 2013, the Red Sox sold out every home game—a total of 820 games (794 regular season) for a major professional sports record. Both Neil Diamond's "Sweet Caroline", and The Standells's "Dirty Water" have become anthems for the Red Sox.

Color blindness

Color blindness, also known as color vision deficiency, is the decreased ability to see color or differences in color. Simple tasks such as selecting ripe fruit, choosing clothing, and reading traffic lights can be more challenging. Color blindness may also make some educational activities more difficult. However, problems are generally minor, and most people find that they can adapt. People with total color blindness (achromatopsia) may also have decreased visual acuity and be uncomfortable in bright environments.The most common cause of color blindness is an inherited problem in the development of one or more of the three sets of color-sensing cones in the eye. Males are more likely to be color blind than females, as the genes responsible for the most common forms of color blindness are on the X chromosome. As females have two X chromosomes, a defect in one is typically compensated for by the other, while males only have one X chromosome. Color blindness can also result from physical or chemical damage to the eye, optic nerve or parts of the brain. Diagnosis is typically with the Ishihara color test; however, a number of other testing methods also exist.There is no cure for color blindness. Diagnosis may allow a person's teacher to change their method of teaching to accommodate the decreased ability to recognize colors. Special lenses may help people with red-green color blindness when under bright conditions. There are also mobile apps that can help people identify colors.Red-green color blindness is the most common form, followed by blue-yellow color blindness and total color blindness. Red-green color blindness affects up to 8% of males and 0.5% of females of Northern European descent. The ability to see color also decreases in old age. Being color blind may make people ineligible for certain jobs in certain countries. This may include being a pilot, train driver and working in the armed forces. The effect of color blindness on artistic ability, however, is controversial. The ability to draw appears to be unchanged, and a number of famous artists are believed to have been color blind.

Detroit Red Wings

The Detroit Red Wings are a professional ice hockey team based in Detroit. They are members of the Atlantic Division in the Eastern Conference of the National Hockey League (NHL) and are one of the Original Six teams of the league. Founded in 1926, the team was known as the Detroit Cougars from then until 1930. For the 1930–31 and 1931–32 seasons the team was called the Detroit Falcons, and in 1932 changed their name to the Red Wings.As of 2019, the Red Wings have won the most Stanley Cup championships of any NHL franchise based in the United States (11) and are third overall in total Stanley Cup championships, behind the Montreal Canadiens (24) and Toronto Maple Leafs (13). The Wings played their home games at Joe Louis Arena from 1979 until 2017, after playing for 52 years in Olympia Stadium. They moved into the new Little Caesars Arena beginning with the 2017–18 season. The Red Wings are one of the most popular and successful franchises in the NHL; fans and sports commentators refer to the Detroit area as "Hockeytown", which has been a registered trademark owned by the franchise since 1996.Between the 1931–32 and 1965–66 seasons, the Red Wings missed the playoffs only four times. Between the 1966–67 and 1982–83 seasons, the Red Wings made the playoffs only two times. However, thereafter, from 1983–84 to 2015–16, they made the playoffs 30 times in 32 seasons, including 25-straight from 1990–91 to 2015–16 (not counting the cancelled 2004–05 season), at the time the longest streak of postseason appearances in all of North American professional sports. Since 1983–84, the Red Wings have tallied six regular season first-place finishes and have won the Stanley Cup four times (1997, 1998, 2002, and 2008).

Endangered species

An endangered species is a species which has been categorized as very likely to become extinct. Endangered (EN), as categorized by the International Union for Conservation of Nature (IUCN) Red List, is the second most severe conservation status for wild populations in the IUCN's schema after Critically Endangered (CR).

In 2012, the IUCN Red List featured 3,079 animal and 2,655 plant species as endangered (EN) worldwide. The figures for 1998 were, respectively, 1,102 and 1,197.

Many nations have laws that protect conservation-reliant species: for example, forbidding hunting, restricting land development or creating protected areas. Population numbers, trends and species' conservation status can be found at the lists of organisms by population.

IUCN Red List

The IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List), founded in 1965, has evolved to become the world's most comprehensive inventory of the global conservation status of biological species. It uses a set of criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world, With its strong scientific base, the IUCN Red List is recognized as the most authoritative guide to the status of biological diversity. A series of Regional Red List are produced by countries or organizations, which assess the risk of extinction to species within a political management unit.

The IUCN Red List is set upon precise criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. The aim is to convey the urgency of conservation issues to the public and policy makers, as well as help the international community to try to reduce species extinction. According to the International Union for Conservation of Nature (IUCN) (1996), the formally stated goals of the Red List are (1) to provide scientifically based information on the status of species and subspecies at a global level, (2) to draw attention to the magnitude and importance of threatened biodiversity, (3) to influence national and international policy and decision-making, and (4) to provide information to guide actions to conserve biological diversity.Major species assessors include BirdLife International, the Institute of Zoology (the research division of the Zoological Society of London), the World Conservation Monitoring Centre, and many Specialist Groups within the IUCN Species Survival Commission (SSC). Collectively, assessments by these organizations and groups account for nearly half the species on the Red List.

The IUCN aims to have the category of every species re-evaluated every five years if possible, or at least every ten years. This is done in a peer reviewed manner through IUCN Species Survival Commission (SSC) Specialist Groups, which are Red List Authorities responsible for a species, group of species or specific geographic area, or in the case of BirdLife International, an entire class (Aves).As of 2018, 26,197 species are now classified as vulnerable, critical or endangered.

Infrared

Infrared radiation (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with longer wavelengths than those of visible light, and is therefore generally invisible to the human eye, although IR at wavelengths up to 1050 nanometers (nm)s from specially pulsed lasers can be seen by humans under certain conditions. IR wavelengths extend from the nominal red edge of the visible spectrum at 700 nanometers (frequency 430 THz), to 1 millimeter (300 GHz). Most of the thermal radiation emitted by objects near room temperature is infrared. As with all EMR, IR carries radiant energy and behaves both like a wave and like its quantum particle, the photon.

Infrared radiation was discovered in 1800 by astronomer Sir William Herschel, who discovered a type of invisible radiation in the spectrum lower in energy than red light, by means of its effect on a thermometer. Slightly more than half of the total energy from the Sun was eventually found to arrive on Earth in the form of infrared. The balance between absorbed and emitted infrared radiation has a critical effect on Earth's climate.

Infrared radiation is emitted or absorbed by molecules when they change their rotational-vibrational movements. It excites vibrational modes in a molecule through a change in the dipole moment, making it a useful frequency range for study of these energy states for molecules of the proper symmetry. Infrared spectroscopy examines absorption and transmission of photons in the infrared range.Infrared radiation is used in industrial, scientific, military,

law enforcement, and medical applications. Night-vision devices using active near-infrared illumination allow people or animals to be observed without the observer being detected. Infrared astronomy uses sensor-equipped telescopes to penetrate dusty regions of space such as molecular clouds, detect objects such as planets, and to view highly red-shifted objects from the early days of the universe. Infrared thermal-imaging cameras are used to detect heat loss in insulated systems, to observe changing blood flow in the skin, and to detect overheating of electrical apparatus.

Extensive uses for military and civilian applications include target acquisition, surveillance, night vision, homing, and tracking. Humans at normal body temperature radiate chiefly at wavelengths around 10 μm (micrometers). Non-military uses include thermal efficiency analysis, environmental monitoring, industrial facility inspections, detection of grow-ops, remote temperature sensing, short-range wireless communication, spectroscopy, and weather forecasting.

International Red Cross and Red Crescent Movement

The International Red Cross and Red Crescent Movement is an international humanitarian movement with approximately 17 million volunteers, members and staff worldwide which was founded to protect human life and health, to ensure respect for all human beings, and to prevent and alleviate human suffering.

The movement consists of several distinct organizations that are legally independent from each other, but are united within the movement through common basic principles, objectives, symbols, statutes and governing organisations. The movement's parts are:

The International Committee of the Red Cross (ICRC) is a private humanitarian institution founded in 1863 in Geneva, Switzerland, in particular by Henry Dunant and Gustave Moynier. Its 25-member committee has a unique authority under international humanitarian law to protect the life and dignity of the victims of international and internal armed conflicts. The ICRC was awarded the Nobel Peace Prize on three occasions (in 1917, 1944 and 1963).

The International Federation of Red Cross and Red Crescent Societies (IFRC) was founded in 1919 and today it coordinates activities between the 190 National Red Cross and Red Crescent Societies within the Movement. On an international level, the Federation leads and organizes, in close cooperation with the National Societies, relief assistance missions responding to large-scale emergencies. The International Federation Secretariat is based in Geneva, Switzerland. In 1963, the Federation (then known as the League of Red Cross Societies) was awarded the Nobel Peace Prize jointly with the ICRC.

National Red Cross and Red Crescent Societies exist in nearly every country in the world. Currently 190 National Societies are recognized by the ICRC and admitted as full members of the Federation. Each entity works in its home country according to the principles of international humanitarian law and the statutes of the international Movement. Depending on their specific circumstances and capacities, National Societies can take on additional humanitarian tasks that are not directly defined by international humanitarian law or the mandates of the international Movement. In many countries, they are tightly linked to the respective national health care system by providing emergency medical services.

Red Army

The Workers' and Peasants' Red Army (Russian: Рабоче-крестьянская Красная армия (РККА), Raboče-krestjjanskaja Krasnaja armija (RKKA)), frequently shortened to Red Army (Красная армия (КА)code: rus promoted to code: ru , Krasnaja armija (KA); Army of Work) was the army and the air force of the Russian Soviet Federative Socialist Republic, and, after 1922, the Union of Soviet Socialist Republics. The army was established immediately after the 1917 October Revolution (Red October or Bolshevik Revolution). The Bolsheviks raised an army to oppose the military confederations (especially the various groups collectively known as the White Army) of their adversaries during the Russian Civil War. Beginning in February 1946, the Red Army, along with the Soviet Navy, embodied the main component of the Soviet Armed Forces; taking the official name of "Soviet Army", until its dissolution in December 1991.

The Red Army provided the largest land force in the Allied victory in the European theatre of World War II, and its invasion of Manchuria assisted the unconditional surrender of Imperial Japan. During operations on the Eastern Front, it accounted for 75–80% of casualties the Wehrmacht and Waffen-SS suffered during the war and ultimately captured the Nazi German capital, Berlin.

Red Bull

Red Bull is an energy drink sold by Red Bull GmbH, an Austrian company created in 1987. Red Bull has the highest market share of any energy drink in the world, with 6.790 billion cans sold in a year (as of 2018).Austrian entrepreneur Dietrich Mateschitz was inspired by an existing energy drink named Krating Daeng, which was first introduced and sold in Thailand by Chaleo Yoovidhya. He took this idea, modified the ingredients to suit the tastes of Westerners, and, in partnership with Chaleo, founded Red Bull GmbH in 1987 in Chakkapong, Thailand. In Thai, daeng means red, and a krating (known in English as a gaur or Indian bison) is a large species of wild bovine native to South Asia. Yoovidhya's heirs own majority stakes in both brands, and they both use the same red bull on yellow sun logo while continuing to market the separate drinks to the respective Thai and Western markets.

Red Bull is sold in a tall and slim blue-silver can. Originally only available in a single nondescript flavor and regular or sugar-free formulas, a line of "color editions" with artificial fruit flavors were added to the line beginning in 2013. The Red Bull company slogan is "Red Bull gives you wings". Rather than following a traditional approach to mass marketing, Red Bull has generated awareness and created a 'brand myth' through proprietary extreme sport event series such as Red Bull Cliff Diving World Series, Red Bull Air Race, Red Bull Crashed Ice and stand-out stunts such as the Stratos space diving project.Red Bull's marketing arsenal also includes multiple sports team ownerships (Formula One teams Red Bull Racing and Scuderia Toro Rosso, football clubs RB Leipzig, FC Red Bull Salzburg, FC Liefering, Red Bull Brasil and New York Red Bulls), celebrity endorsements, and music, through its record label Red Bull Records.Energy drinks have been associated with health risks, such as masking the effects of intoxication when consumed with alcohol, and excessive or repeated consumption can lead to cardiac and psychiatric conditions. However, the European Food Safety Authority (EFSA) concluded that an adequate consumption of Red Bull and other popular energy drinks is safe and that the amount of caffeine in standard Red Bull cans is unlikely to interact adversely with other typical constituents of energy drinks or with alcohol. Energy drinks have the effects that caffeine and sugar give, but there is no distinct evidence that the wide variety of other ingredients has any effect.

Red Bull Racing

Red Bull Racing (also known as Red Bull or RBR and competing as Aston Martin Red Bull Racing) is a Formula One racing team, racing under an Austrian licence and based in the United Kingdom. The team raced under a British licence from 2005 to 2006 and has raced under an Austrian licence since 2007. It is one of two Formula One teams owned by beverage company Red Bull GmbH, the other being Scuderia Toro Rosso. The team has been managed by Christian Horner since its formation in 2005.The team used engines supplied by Renault between 2007 and 2018. During this partnership they won four successive Drivers' and Constructors' Championship titles from 2010 to 2013, becoming the first Austrian-licensed team to win the title. The team began using Honda engines in 2019.

Red Hot Chili Peppers

Red Hot Chili Peppers are an American rock band formed in Los Angeles in 1983. The group's musical style primarily consists of rock with an emphasis on funk, as well as elements from other genres such as punk rock and psychedelic rock. When played live, their music incorporates elements of jam band due to the improvised nature of many of their performances. Currently, the band consists of founding members vocalist Anthony Kiedis and bassist Flea (Michael Peter Balzary), longtime drummer Chad Smith, and former touring guitarist Josh Klinghoffer. Red Hot Chili Peppers are one of the best-selling bands of all time with over 80 million records sold worldwide, they have been nominated for sixteen Grammy Awards, of which they have won six, and are the most successful band in alternative rock radio history, currently holding the records for most number-one singles (13), most cumulative weeks at number one (85) and most top-ten songs (25) on the Billboard Alternative Songs chart. In 2012, they were inducted into the Rock and Roll Hall of Fame.

The band's original lineup, originally named Tony Flow and the Miraculously Majestic Masters of Mayhem, featured guitarist Hillel Slovak and drummer Jack Irons, alongside Kiedis and Flea. Because of commitments to other bands, Slovak and Irons did not play on the band's self-titled debut album (1984). Slovak performed on the second and third albums, Freaky Styley (1985) and The Uplift Mofo Party Plan (1987), but he died from a heroin overdose in 1988. As a result of his friend's death, Irons chose to leave the group. After short-lived replacements on guitar and drums, John Frusciante and Chad Smith joined in 1988. The lineup of Flea, Kiedis, Frusciante, and Smith was the longest-lasting and recorded five studio albums beginning with Mother's Milk (1989). In 1990, the group signed with Warner Bros. Records and recorded the album Blood Sugar Sex Magik (1991) under producer Rick Rubin. This album became the band's first major commercial success, but Frusciante grew uncomfortable with the band's popularity and left abruptly in 1992 in the middle of the Blood Sugar Sex Magik Tour.

After two temporary guitarists, Dave Navarro joined the group in 1993 and played on their subsequent album, One Hot Minute (1995). Although commercially successful, the album failed to match the critical or popular acclaim of Blood Sugar Sex Magik, selling less than half as much as its predecessor. Navarro was fired from the band in 1998. Frusciante, fresh out of drug rehabilitation, rejoined the band that same year at Flea's request. The reunited quartet returned to the studio to record Californication (1999), which became the band's biggest commercial success with 16 million copies sold worldwide. That album was followed three years later by By the Way (2002), and then four years later by the double album Stadium Arcadium (2006), their first number-one album in America. After a world tour, the group went on an extended hiatus. Frusciante announced he was amicably leaving the band in 2009 to focus on his solo career. Klinghoffer, who had worked both as a sideman for the band on their Stadium Arcadium tour and on Frusciante's solo projects, replaced him. The band's tenth studio album, I'm with You, was released in 2011 and topped the charts in 18 different countries. The band released their eleventh studio album, The Getaway, in 2016. The album was produced by Danger Mouse, marking the first time since Mother's Milk that the Red Hot Chili Peppers had not worked with Rubin, and topped the charts in ten different countries. As of November 2018, the band is in the process of working on their twelfth studio album which they expect to release in 2019.

Red Sea

The Red Sea (also the Erythraean Sea, Arabic: البحر الأحمر‎) is a seawater inlet of the Indian Ocean, lying between Africa and Asia. The connection to the ocean is in the south through the Bab el Mandeb strait and the Gulf of Aden. To the north lie the Sinai Peninsula, the Gulf of Aqaba, and the Gulf of Suez (leading to the Suez Canal). The Red Sea is a Global 200 ecoregion. The sea is underlain by the Red Sea Rift which is part of the Great Rift Valley.

The Red Sea has a surface area of roughly 438,000 km2 (169,100 mi2), is about 2250 km (1398 mi) long and, at its widest point, 355 km (220.6 mi) wide. It has a maximum depth of 3,040 m (9,970 ft) in the central Suakin Trough, and an average depth of 490 m (1,608 ft). However, there are also extensive shallow shelves, noted for their marine life and corals. The sea is the habitat of over 1,000 invertebrate species, and 200 soft and hard corals. It is the world's northernmost tropical sea.

Red blood cell

Red blood cells, also known as RBCs, red cells, red blood corpuscles, haematids, erythroid cells or erythrocytes (from Greek erythros for "red" and kytos for "hollow vessel", with -cyte translated as "cell" in modern usage), are the most common type of blood cell and the vertebrate's principal means of delivering oxygen (O2) to the body tissues—via blood flow through the circulatory system. RBCs take up oxygen in the lungs, or gills of fish, and release it into tissues while squeezing through the body's capillaries.

The cytoplasm of erythrocytes is rich in hemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red color of the cells and the blood. The cell membrane is composed of proteins and lipids, and this structure provides properties essential for physiological cell function such as deformability and stability while traversing the circulatory system and specifically the capillary network.

In humans, mature red blood cells are flexible and oval biconcave disks. They lack a cell nucleus and most organelles, in order to accommodate maximum space for hemoglobin; they can be viewed as sacks of hemoglobin, with a plasma membrane as the sack. Approximately 2.4 million new erythrocytes are produced per second in human adults. The cells develop in the bone marrow and circulate for about 100–120 days in the body before their components are recycled by macrophages. Each circulation takes about 60 seconds (one minute). Approximately a quarter of the cells in the human body are red blood cells. Nearly half of the blood's volume (40% to 45%) is red blood cells.

Packed red blood cells (pRBC) are red blood cells that have been donated, processed, and stored in a blood bank for blood transfusion.

Red fox

The red fox (Vulpes vulpes) is the largest of the true foxes and one of the most widely distributed members of the order Carnivora, being present across the entire Northern Hemisphere from the Arctic Circle to North Africa, North America and Eurasia. It is listed as least concern by the IUCN. Its range has increased alongside human expansion, having been introduced to Australia, where it is considered harmful to native mammals and bird populations. Due to its presence in Australia, it is included on the list of the "world's 100 worst invasive species".The red fox originated from smaller-sized ancestors from Eurasia during the Middle Villafranchian period, and colonised North America shortly after the Wisconsin glaciation. Among the true foxes, the red fox represents a more progressive form in the direction of carnivory. Apart from its large size, the red fox is distinguished from other fox species by its ability to adapt quickly to new environments. Despite its name, the species often produces individuals with other colourings, including leucistic and melanistic individuals. Forty-five subspecies are currently recognised, which are divided into two categories: the large northern foxes, and the small, basal southern foxes of Asia and North Africa.Red foxes are usually together in pairs or small groups consisting of families, such as a mated pair and their young, or a male with several females having kinship ties. The young of the mated pair remain with their parents to assist in caring for new kits. The species primarily feeds on small rodents, though it may also target rabbits, game birds, reptiles, invertebrates and young ungulates. Fruit and vegetable matter is also eaten sometimes. Although the red fox tends to kill smaller predators, including other fox species, it is vulnerable to attack from larger predators, such as wolves, coyotes, golden jackals and medium- and large-sized felines.The species has a long history of association with humans, having been extensively hunted as a pest and furbearer for many centuries, as well as being represented in human folklore and mythology. Because of its widespread distribution and large population, the red fox is one of the most important furbearing animals harvested for the fur trade. Too small to pose a threat to humans, it has extensively benefited from the presence of human habitation, and has successfully colonised many suburban and urban areas. Domestication of the red fox is also underway in Russia, and has resulted in the domesticated red fox.

Red hair

Red hair (or ginger hair) occurs naturally in one to two percent of the human population, appearing with greater frequency (two to six percent) among people of northern or western European ancestry and lesser frequency in other populations. It is most common in individuals homozygous for a recessive allele on chromosome 16 that produces an altered version of the MC1R protein.Red hair varies in hue from a deep burgundy or bright copper (auburn) to burnt orange or red-orange to and strawberry blond. Characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin, it is associated with fair skin color, lighter eye color, freckles, and sensitivity to ultraviolet light.Cultural reactions to red hair have varied from ridicule to admiration; many common stereotypes exist regarding redheads, who are often portrayed as possessing fiery tempers.The term redhead has been in use since at least 1510.

Red panda

The red panda (Ailurus fulgens) is a mammal native to the eastern Himalayas and southwestern China. It is listed as Endangered on the IUCN Red List because the wild population is estimated at fewer than 10,000 mature individuals and continues to decline due to habitat loss and fragmentation, poaching, and inbreeding depression.The red panda has reddish-brown fur, a long, shaggy tail, and a waddling gait due to its shorter front legs; it is roughly the size of a domestic cat, though with a longer body and somewhat heavier. It is arboreal, feeds mainly on bamboo, but also eats eggs, birds, and insects. It is a solitary animal, mainly active from dusk to dawn, and is largely sedentary during the day. It is also called the lesser panda, the red bear-cat, and the red cat-bear.The red panda is the only living species of the genus Ailurus and the family Ailuridae. It has been previously placed in the raccoon and bear families, but the results of phylogenetic analysis provide strong support for its taxonomic classification in its own family, Ailuridae, which is part of the superfamily Musteloidea, along with the weasel, raccoon and skunk families. Two subspecies are recognized. It is not closely related to the giant panda, which is a basal ursid.

Red states and blue states

Since the 2000 United States presidential election, red states and blue states have referred to states of the United States whose voters predominantly choose either the Republican Party (red) or Democratic Party (blue) presidential candidates. Since then, the use of the term has been expanded to differentiate between states being perceived as liberal and those perceived as conservative. Examining patterns within states reveals that the reversal of the two parties' geographic bases has happened at the state level, but it is more complicated locally, with urban/rural divides associated with many of the largest changes.All states contain both liberal and conservative voters (i.e. they are "purple") and only appear blue/red on the electoral map because of the winner-take-all system used by most states in the Electoral College. However, the perception of some states as "blue" and some as "red" was reinforced by a degree of partisan stability from election to election—from the 2000 election to the 2004 election, only three states changed "color" and as of 2016 fully 38 out of 50 states have voted for the same party in every presidential election since the red/blue terminology was popularized in 2000.

Texas Tech Red Raiders basketball

The Texas Tech Red Raiders basketball team represents Texas Tech University in basketball. Texas Tech competes in Division I of the National Collegiate Athletics Association (NCAA), and as a charter member of the Big 12 Conference, since its first season in 1996. The team previously competed in the Border Conference and Southwest Conference. The team was founded in 1925, having since won 12 regular season conference championships, 5 postseason conference championships, and made 17 appearances in the NCAA Tournament as of the 2018–19 season. The Red Raiders have played their home games at the United Supermarkets Arena since 1999 on the university's campus in Lubbock, Texas. Chris Beard, the team's 17th head coach, has led the Red Raiders since the 2016–17 season.

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