Color matching four colors

Quick answer：

Color matching is the process of combining colors to create a harmonious and visually appealing result. In the context of four colors, one common reference is the CMYK color model, which stands for Cyan, Magenta, Yellow, and Key (Black). This model is used in printing and involves mixing these four colors in varying proportions to produce a wide range of colors. Another approach is the use of color wheels, which help in understanding complementary and contrasting colors. Understanding color theory can enhance the aesthetic appeal of design and art.