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  2. Complementary colors - Wikipedia

    en.wikipedia.org/wiki/Complementary_colors

    Complementary colors are pairs of colors which, when combined or mixed, cancel each other out (lose chroma) by producing a grayscale color like white or black. [1] [better source needed] When placed next to each other, they create the strongest contrast for those two colors. Complementary colors may also be called "opposite colors".

  3. Opponent process - Wikipedia

    en.wikipedia.org/wiki/Opponent_process

    He thought that the colors red, yellow, green, and blue are special in that any other color can be described as a mix of them, and that they exist in opposite pairs. That is, either red or green is perceived and never greenish-red: Even though yellow is a mixture of red and green in the RGB color theory, humans do not perceive it as such.

  4. Opponent-process theory - Wikipedia

    en.wikipedia.org/wiki/Opponent-process_theory

    The colors in each pair oppose each other. Red-green receptors cannot send messages about both colors at the same time. This theory also explains negative afterimages; once a stimulus of a certain color is presented, the opponent color is perceived after the stimulus is removed because the anabolic and catabolic processes are reversed. For ...

  5. Primary color - Wikipedia

    en.wikipedia.org/wiki/Primary_color

    Before the color names cyan and magenta were in common use, these primaries were often known as blue and red, respectively, and their exact color has changed over time with access to new pigments and technologies. [23] Organizations such as Fogra, [24] European Color Initiative and SWOP publish colorimetric CMYK standards for the printing ...

  6. Color wheel - Wikipedia

    en.wikipedia.org/wiki/Color_wheel

    A color wheel or color circle [1] is an abstract illustrative organization of color hues around a circle, which shows the relationships between primary colors, secondary colors, tertiary colors etc. Some sources use the terms color wheel and color circle interchangeably; [ 2 ] [ 3 ] however, one term or the other may be more prevalent in ...

  7. Opposite - Wikipedia

    en.wikipedia.org/wiki/Opposite

    The relationship between opposites is known as opposition. A member of a pair of opposites can generally be determined by the question What is the opposite of X ? The term antonym (and the related antonymy) is commonly taken to be synonymous with opposite, but antonym also has other more restricted meanings. Graded (or gradable) antonyms are ...