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Red is the color at the long wavelength 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 a secondary color (made from magenta and yellow) in the CMYK color model, and is the complementary color of cyan.
The color is defined as red in the NCS or Natural Color System (NCS 1080-R). The Natural Color System is a color system based on the four unique hues or psychological primary colors red, yellow, green, and blue. The NCS is based on the opponent process theory of vision.
Red is a primary color across all models of color space. It is the color of blood . It is often associated with love , passion , and lust but also danger and aggression.
This article discusses the meaning of red in various cultures and traditions. Furthermore, various applications of this color in different countries are explained.
Specific color meaning. Different colors are perceived to mean different things. For example, tones of red lead to feelings of arousal while blue tones are often associated with feelings of relaxation. Both of these emotions are pleasant, so therefore, the colors themselves can procure positive feelings in advertisements.
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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 .
If the light is not a pure white source (the case of nearly all forms of artificial lighting), the resulting spectrum will appear a slightly different color. Red paint, viewed under blue light, may appear black. Red paint is red because it scatters only the red components of the spectrum.
Scarlet is a bright red color, sometimes with a slightly orange tinge. In the spectrum of visible light, and on the traditional color wheel , it is one-quarter of the way between red and orange, slightly less orange than vermilion .
Various shades of the color red. This category is for all varieties, not only shades in the technical sense. See also the categories Shades of magenta and Shades of pink.
Color theory, or more specifically traditional color theory, is the historical body of knowledge describing the behavior of colors, namely in color mixing, color contrast effects, color harmony, color schemes and color symbolism. Modern color theory is generally referred to as Color science.