Hue (H)
Hue is a physical and psychological characteristic of a color that is related to the color's basic wavelength. It is known from experiments that visible light of different wavelengths has different colors. Light of many wavelengths can be mixed in different proportions to form different colors, but once the composition of the wavelengths is constant, the color is determined. Achromatic colors (black, white, gray) do not have hue characteristics; all colors (red, orange, yellow, green, blue, indigo, violet, etc.) are characteristics that represent the appearance of the colors. They are all shades, sometimes called tints.
Saturation (S)
Saturation refers to the intensity or purity of a japan number data color and is the proportion of gray component in a hue, represented from 0% to 100% (pure color).
Brightness (B)
Value is the relative lightness and darkness of a color, usually measured from 0% (black) to 100% (white).
2. RGB mode
RGB mode is based on the principle of mixing the three primary colors in nature. The three primary colors - red (R), green (G) and blue (B) - are divided into each color according to the brightness value from 0 (black) to 255 (white). Assigned in order, thereby indicating its color. When the primary colors of different brightness are mixed, 256 * 256 * 256 colors are formed, which is about 16.7 million kinds. For example, bright red can have an R value of 246, a G value of 20 and a B value of 50. When the brightness values of the three primary colors are equal, gray is produced; when all the brightness values are 255, pure white is produced; and when all the brightness values are 0, pure black is produced. When the three kinds of colored light are mixed, usually the color generated is brighter than the original color brightness value, so the color generation method in RGB mode is also called the color light addition method.