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colorimetric values/coordinates

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colorimetric values/coordinates (In French coordonnées colorimétriques) mathematical values for the description of chromaticity coordinates; the parameters used for this depend on the selection of the color space model, e.g. x and y in the CIExyY(1931) color space or L*, a* and b* in the CIELAB(1976) color space. The values apply only for the illuminant and the standard observer, which must also be specified, e.g. D50/2°.