Although color cannot function independently like "shape", it does not mean that the role of color can be ignored. In a sense, the role of "color" is not only irreplaceable by form, but also beyond the reach of form. If shape is better than describing shape, image, demeanor, action, and strength, then color is good at expressing look, emotion, emotion, state, and atmosphere. Some people think that shape is rational and color is emotional. Although it is not very precise, it has some truth. So...