Comparison color, color contrast, mainly refers to the contrast of color and warmth. TV screens are divided into shades and can be divided into two categories: cold and warm. Red, orange and yellow are simmering, green, blue and purple are cold, green is middle, not cold or warm. The law of color contrast is: in a warm-toned environment, the subject of cool tones is conspicuous, and in a cold-tuned environment, the warm-toned body is most prominent. In addition to the contrast between cold and warm, color contrast, color contrast, brightness contrast, saturation contrast and so on.