> primaries and the 'opposite' secondary The fancy color theory word for this relationship is "complementary". > a red and a green and then a mix of the two t

> primaries and the 'opposite' secondary The fancy color theory word for this relationship is "complementary". > a red and a green and then a mix of the two to make a grey. If you need a black (though you seldom do) it's a good trick to mix one from the colors you're already using.