• Pairs of colors which, when combined or mixed, cancel each other out (lose hue) by producing a grayscale color like white or black. When placed next to each other, they create the strongest contrast for those two colors. Complementary colors may also be called opposite colors. Modern color theory uses either the RGB additive color model or the CMY subtractive color model, and in these, the complementary pairs are red-cyan, green-magenta, and blue-yellow. In the traditional RYB color model, the complementary color pairs are red-green, yellow-purple, and blue-orange. Opponent process theory suggests that the most contrasting color pairs are red-green and blue-yellow. ← Wikipedia

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