CIExyY

CIExyY is a color space developed by the International Commission on Illumination (CIE) in 1931. It is a three-dimensional color space that represents colors based on their chromaticity and luminance. The three components of CIExyY are:

1. x and y: These represent the chromaticity coordinates, which are derived from the tristimulus values X, Y, and Z. They describe the color's position on the chromaticity diagram, which is a two-dimensional representation of all possible colors.

2. Y: This represents the luminance, which is the brightness of the color. It is a measure of the amount of light emitted or reflected by the color.

CIExyY is widely used in color science and technology for various applications, such as color matching, color reproduction, and color management. It is also used in the development of color spaces like sRGB and Adobe RGB. The CIExyY color space is based on the human visual system and is designed to be perceptually uniform, meaning that equal distances in the color space correspond to equal perceived differences in color. This makes it a useful tool for understanding and manipulating color in a way that is consistent with human perception.