This kind of contrast is essentially the contrast effect formed by the differences of various pigments. This kind of contrast effect is usually expressed in the following ways: the contrast between light and dark (or called the contrast between yin and yang), like the easy light picture in China; the contrast between cold and warm, such as the contrast of red and blue; the contrast between dynamic and static, such as the elegant and calm background and lively jumping The pattern text contrast: the contrast of light and heavy, such as the contrast of deep pigment and light pigment, etc.