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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. 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. 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.Red pigment made from ochre was one of the first colors used in prehistoric art. The Ancient Egytians 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. 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.
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Yellow
Yellow is the color between orange and green on the spectrum of visible light. It is evoked by light with a dominant wavelength of roughly 570–590 nm. It is a primary color in subtractive color systems, used in painting or color printing. In the RGB color model, used to create colors on television and computer screens, yellow is a secondary color made by combining red and green at equal intensity. Carotenoids give the characteristic yellow color to autumn leaves, corn, canaries, daffodils, and lemons, as well as egg yolks, buttercups, and bananas. They absorb light energy and protect plants from photodamage. Sunlight has a slight yellowish hue, due to the surface temperature of the sun.
Because it was widely available, yellow ochre pigment was one of the first colors used in art; the Lascaux cave in France has a painting of a yellow horse 17,000 years old. Ochre and orpiment pigments were used to represent gold and skin color in Egyptian tombs, then in the murals in Roman villas. In the early Christian church, yellow was the color associated with the Pope and the golden keys of the Kingdom, but was also associated with Judas Iscariot and was used to mark heretics. In the 20th century, Jews in Nazi-occupied Europe were forced to wear a yellow star. In China, bright yellow was the color of the Middle Kingdom, and could be worn only by the Emperor and his household; special guests were welcomed on a yellow carpet.According to surveys in Europe, Canada, and the United States, yellow is the color people most often associate with amusement, gentleness, humor, and spontaneity, but also with duplicity, envy, jealousy, avarice, and, in the U.S., with cowardice. In Iran it has connotations of pallor/sickness, but also wisdom and connection. In China and many Asian countries, it is seen as the color of happiness, glory, harmony and wisdom.
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Red (adjective)
Having red as its color.
“The girl wore a red skirt.”
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Red (adjective)
Having an orange-brown or orange-blond colour; ginger.
“Her hair had red highlights.”
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Red (adjective)
Of the hearts or diamonds suits. Compare of the spades or clubs suits
“I got two red queens, and he got one of the black queens.”
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Red (adjective)
Supportive of, related to, or dominated by a political party or movement represented by the color red:
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Red (adjective)
the U.S. Republican party
“a red state”
“a red Congress”
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Red (adjective)
Amerind; relating to Amerindians or First Nations
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Red (adjective)
Of the lower-frequency region of the (typically visible) part of the electromagnetic spectrum which is relevant in the specific observation.
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Red (adjective)
Having a color charge of red.
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Red (noun)
Any of a range of colours having the longest wavelengths, 670 nm, of the visible spectrum; a primary additive colour for transmitted light: the colour obtained by subtracting green and blue from white light using magenta and yellow filters; the colour of blood, ripe strawberries, etc.
“color panel|F00000”
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Red (noun)
A revolutionary socialist or (most commonly) a Communist; usually capitalized a Bolshevik, a supporter of the Bolsheviks in the Russian Civil War.
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Red (noun)
One of the 15 red balls used in snooker, distinguished from the colours.
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Red (noun)
Red wine.
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Red (noun)
A redshank.
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Red (noun)
An Amerind.
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Red (noun)
The drug secobarbital; a capsule of this drug.
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Red (noun)
A red light a traffic signal
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Red (noun)
red lemonade
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Red (noun)
One of the three color charges for quarks.
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Red (noun)
chili con carne (usually in the phrase “bowl of red”)
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Yellow (adjective)
Having yellow as its colour.
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Yellow (adjective)
Lacking courage.
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Yellow (adjective)
Characterized by sensationalism, lurid content, and doubtful accuracy.
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Yellow (adjective)
Far East Asian relating to Asian people.
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Yellow (adjective)
Of mixed Aboriginal and Caucasian ancestry.
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Yellow (adjective)
High yellow.
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Yellow (adjective)
Related to the Liberal Democrats.
“yellow constituencies”
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Yellow (adjective)
Related to the Free Democratic Party of Germany.
“the black-yellow coalition”
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Yellow (noun)
The colour of gold, butter, or a lemon; the colour obtained by mixing green and red light, or by subtracting blue from white light.
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Yellow (noun)
The intermediate light in a set of three traffic lights, the illumination of which indicates that drivers should stop short of the intersection if it is safe to do so.
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Yellow (noun)
One of the colour balls used in snooker, with a value of 2 points.
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Yellow (noun)
One of two groups of object balls, or a ball from that group, as used in the principally British version of pool that makes use of unnumbered balls (the (yellow(s) and red(s)); contrast stripes and solids in the originally American version with numbered balls).
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Yellow (noun)
A yellow card.
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Yellow (verb)
To become yellow or more yellow.
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Yellow (verb)
To make (something) yellow or more yellow.
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Yellow (adjective)
of the colour between green and orange in the spectrum, a primary subtractive colour complementary to blue; coloured like ripe lemons or egg yolks
“curly yellow hair”
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Yellow (adjective)
having a naturally yellowish or olive skin (as used to describe Chinese or Japanese people).
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Yellow (adjective)
denoting a warning of danger which is thought to be near but not actually imminent
“he put Camp Visoko on yellow alert”
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Yellow (adjective)
not brave; cowardly
“he’d better get back there quick and prove he’s not yellow”
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Yellow (adjective)
showing jealousy or suspicion.
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Yellow (adjective)
(of a style of writing, especially in journalism) lurid and sensational
“he based his judgement on headlines and yellow journalism”
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Yellow (noun)
yellow colour or pigment
“the craft detonated in a blaze of red and yellow”
“a wide range of colours from rich vibrant reds, yellows, blues, and greens to more unexpected pastel shades”
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Yellow (noun)
yellow clothes or material
“everyone dresses in yellow”
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Yellow (noun)
a yellow ball or piece in a game or sport, especially the yellow ball in snooker
“he missed an easy yellow in frame four”
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Yellow (noun)
used in names of moths or butterflies that are mainly yellow in colour.
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Yellow (noun)
any of a number of plant diseases in which the leaves turn yellow, typically caused by viruses and transmitted by insects.
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Yellow (verb)
become yellow, especially with age
“the cream paint was beginning to yellow”