The chromaticity system that expresses the object color with the hue, lightness and chroma stipulated by the Munsell color three-dimensional model.
The hue used in the Munsell color system, represented by the symbol H.
The lightness used in the Munsell color system, represented by the symbol V.
Chroma used in the Munsell color system, represented by the symbol C

The Munse1l color scale system is a color scale system proposed and established by the American painter Munsell in 1925. It uses a uniform color three-dimensional space (with lightness, hue and chroma as coordinates) to represent color three-dimensionally. Color classification and calibration system. The color marking tool is the Munsell Color Chart. Later, it was revised by the Color Measurement Committee of the Optical Society of America to form a revised Munsell color scale system. In 1959, Japan adopted the revised Munsell color system to formulate the JISZ8721 "Method of Expressing Color with Three Levels" standard, and the Japanese Standards Association published the JIS standard Color Chart on this basis. my country's national standard GB/T6749-86 "Paint Film Color Representation Method" also refers to the adoption of ASTMD1535-80 "Munsell System Color Representation Method".
The Munsell system color tri-attribute symbols represent the following meanings.
The special sign of hue is H, which means that the object is red, yellow, green, blue, purple or one of the three attributes of color, which is represented by numbers and letters. The symbol of Vine film color classification and letter visibility is V, which represents one of the three attributes of the color that reflects how much light an object reflects. Desired black is 0, and desiring self-color is 10, and the perception difference of lightness between 0 and 10 is divided with the same degree.
The symbol of chroma is C, which means that the color is higher than the gray with the same lightness. The chroma can be divided into 0~20, and generally when the chroma is less than 0.5, it is a shadowless color. In this way, the color symbol can be represented by HV/C, for example, pure red is 5R4/14.
The Munsell color scale system is a widely used color system in the Color Chart system. As a color benchmark, its value is very high. It can accurately express various colors, but it does not express good emotions, so it is not good to use as a reference for color design.