How to make the color picture have cold and warm contrast?

A work must first have an obvious theme color content, that is, the main color, is it cold or warm? ! This should be clear! The color of the picture is clear, and the picture has an overall atmosphere! Secondly, the color of the picture must have a cold and warm contrast, in order to have a comparative aesthetic feeling in the unity of the picture! So how does the picture form a cold and warm contrast? It can be analyzed from the following aspects: 1. In cold colors, there should be a small area of warm objects in a large area of cold colors, and warm colors should be colder. Otherwise, it will remain unchanged. 2. Because of the color of the light source, the light-receiving part and the backlight part of the object form a contrast between cold color and warm color. If the primary color of light is warm, the light receiving part is warmer and the backlight part is colder. Otherwise, still.