According to Munsell's color stereo theory, the brightness from black to white is arithmetically divided into nine levels, so 1-3 is a low brightness level; 4-6 is the middle brightness scale; 7-9 is a high-definition color scale. ?

"Brightness" refers to the brightness of a color. White has the highest brightness and black has the lowest brightness. Different shades have different lightness. Yellow has high brightness, while red and blue have low brightness. Any hue, such as white, will improve the brightness, and the more white components, the higher the brightness; If any hue is adjusted to black, the brightness is relatively low, and the more black, the higher the brightness. ?

Extended data:

Tone contrast:

After more than two kinds of color matching, the color contrast effect caused by hue difference is called hue contrast. It is a basic aspect of color contrast, and its contrast intensity depends on the distance (angle) between tones on the color phase ring. The smaller the distance (angle), the weaker the contrast and the stronger the contrast.

Tone type:

Tone tendency can be roughly summarized as bright tone, gray tone, light tone, dark tone, intermediate tone and so on.

picture contrast

When contrasting tones, if the ratio of the surrounding colors to the pattern area is large, the closer the lightness is, the more obvious the effect will be and the sense of contrast will be enhanced. In addition, the combination of high-purity tone series will make the contrast effect more obvious.