Определение complementary color в Английский Язык Английский Язык словарь
either one of two chromatic colors that when mixed together give white (in the case of lights) or gray (in the case of pigments); "yellow and blue are complementaries
primary or secondary colors that are opposite each other on the color wheel (in the case of light: two mixed together produce white, in the case of pigments: two mixed together produce gray)