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For practical additive color models, an equal superposition of all primaries results in neutral (gray or white). In the RGB model, an equal mixture of red and green is yellow, an equal mixture of green and blue is cyan and an equal mixture of blue and red is magenta. [1]: 4.2 Yellow, cyan and magenta are the secondary colors of the RGB model.
Brown colors are dark or muted shades of reds, oranges, and yellows. Browns are sometimes by mixing two complementary colors from the RYB model (combining all three primary colors). In theory, such combinations should produce black, but in practice (because of non-ideal pigments), they do not.
Although a combination of 100% cyan, magenta, and yellow inks would, in theory, completely absorb the entire visible spectrum of light and produce a perfect black, practical inks fall short of their ideal characteristics, and the result is a dark, muddy color that is not quite black. Black ink absorbs more light and yields much better blacks.
Primary colors of the CMY color model: cyan, magenta, and yellow, mixed to form secondary colors red, green, and blue. The RGB color model is an additive mixing model, used to estimate the mixing of colored light, with primary colors red, green, and blue. The secondary colors are yellow, cyan and magenta as demonstrated here:
To obtain vivid mixed colors, according to split-primary theory, it is necessary to employ two primary colors whose biases both fall in the direction, on the color wheel, of the color to be mixed, combining, for example, green-biased blue and green-biased yellow to make bright green.
Shades of brown can be produced by combining red, yellow, and black [1] pigments, or by a combination of orange and black—illustrated in the color box. The RGB color model , that generates all colors on computer and television screens, makes brown by combining red and green light at different intensities.
This moves the mixed color toward a neutral color—a gray or near-black. Lights are made brighter or dimmer by adjusting their brightness, i.e., energy level; in painting, lightness is adjusted through mixture with white, black, or a color's complement. The Color Triangle depicting tint, shade, and tone was proposed in 1937 by Faber Birren. [4]
Brown is a dark orange color, made by combining red, yellow and black. [16] It can be thought of as dark orange, but it can also be made in other ways. In the RGB color model, which uses red, green and blue light in various combinations to make all the colors on computer and television screens, it is made by mixing red and green light.