Color matching red and blue plus

Quick answer：

Color matching refers to the harmonious combination of different colors. 'Red and blue plus' could imply adding more colors to the combination of red and blue. In design and fashion, the key to successful color matching lies in understanding color theory, including color harmony, contrast, and dominance. The term 'plus' suggests expanding the color palette beyond red and blue, possibly incorporating complementary or contrasting colors to enhance the overall aesthetic.