Black and blue are two colors that are often associated with each other. They are both cool and calming colors, but they also have some distinct differences. Black is a color that represents darkness, while blue is a color of the sky and the sea. Therefore, antonyms for black blue might include light blue or white, which are bright and cheerful colors that contrast with the darkness of black, or yellow or pink, which are warm and vibrant colors that contrast with the coolness of blue. Other antonyms for black blue may include red or orange, which are bold and intense colors that contrast with the more subdued tones of black and blue.