CIELUV

CIELUV is a CIE color space that represents color with lightness L* and chromaticity coordinates u* and v*. Its approximately uniform geometry makes distances between colors useful for describing perceived differences, especially for self-luminous displays.

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CIE 1976 UCS: The CIE 1976 uniform chromaticity scale is a transformed chromaticity diagram using coordinates u′ and v′. CIELUV builds its chromaticity coordinates from this uniformized diagram.
Color difference: Color difference is a numerical estimate of how distinct two colors appear under specified viewing conditions. Euclidean distances in CIELUV provide a basic estimate of perceived color difference.
CIELChuv: CIELChuv is a cylindrical representation of CIELUV using lightness, chroma, and hue angle. It rearranges CIELUV's u* and v* coordinates into quantities easier to interpret as hue and saturation.
International Commission on Illumination: The International Commission on Illumination, known as CIE, is an organization that develops standards for light, color, and vision. The CIE standardized CIELUV as part of its 1976 color-space recommendations.
CIE XYZ: CIE XYZ is a color space that represents colors using three tristimulus values derived from standardized color matching functions. CIELUV derives its coordinates from XYZ tristimulus values.
Chromaticity diagram: A chromaticity diagram plots color qualities independent of overall intensity. CIELUV coordinates support a diagram where equal distances better approximate equal chromaticity differences.
CIELChab: CIELChab is the cylindrical representation of CIELAB using lightness, chroma, and hue angle. It offers a parallel cylindrical form based on CIELAB rather than CIELUV.
CIE 1976 color spaces: The CIE 1976 color spaces are CIELAB and CIELUV, standardized to improve the perceptual uniformity of color coordinates. CIELUV was introduced alongside CIELAB as one of two complementary 1976 spaces.
CIE standard illuminant: A CIE standard illuminant is a defined spectral power distribution used as a reference for color calculations. The reference white determines the normalization of CIELUV coordinates.
Gamut: A gamut is the set of colors a device or system can produce or represent. CIELUV can visualize the shape and extent of a display's color gamut.