/ˌkɒmplɪ̈ˈmɛnt(ə)ɹi/Scrabble 24Words With Friends 29
Definition
noun either one of two chromatic colors that when mixed together give white (in the case of lights) or grey (in the case of pigments).
— synonyms: complementary_color
adjective of words or propositions so related that each is the negation of the other.
adjective acting as or providing a complement (something that completes the whole).
— synonyms: complemental, completing