Definition of complementary colour noun from the Oxford Advanced Learner's Dictionary

     

    complementary colour

     noun
    noun
    BrE
     
    ; NAmE
     
    (especially US English complementary color)(specialist)
     
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  1. 1a colour that, when mixed with another colour, gives black or white
  2. 2a colour that gives the greatest contrast when combined with a particular colour The designer has chosen the complementary colours blue and orange.