Light color system is called high brightness color system. Dark colors are called low lightness colors. There is no technical term for heating and cooling regulation. Let me introduce some words to you. For example, low long key, high short key. The first word is high or low, indicating the brightness of the main color, that is, the depth of the color. The word "long" or "short" indicates the difference between light and shade of the main color. The small gap is called "short" and the big gap is called "long". For example, the main color is light camel and the secondary color is dark blue. Because the main color is very light, the brightness is high, so it is called high. The lightness of dark blue and light camel is very different, so it is called long. Therefore, the tone of light camel color with deep blue is called treble. For example, light camel is the main color, supplemented by light pink. The minor and major tones are very bright, and the gap between light and dark is very small, so this collocation is called high and low key. By analogy, it is mainly dark blue, supplemented by light yellow, which is called low-long tune. Deep blue is dominant, supplemented by deep coffee, which is called low short tune.