either one of two chromatic colors that when mixed together give white (in the case of lights) or grey (in the case of pigments); yellow and blue are complementaries

[ Syn: complementary color ]

of words or propositions so related that each is the negation of the other; `male' and `female' are complementary terms'

acting as or providing a complement (something that completes the whole)

[ Syn: complemental , completing ]