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tristimulus value
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tristimulus value

color
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Quick Summary

The tristimulus system is a method for visually matching a color using three primary colors: red, green, and blue. The amounts of each primary color needed to create the match are called tristimulus values, typically represented as X, Y, and Z. These values not only define the color but also its perceived brightness, with the Y value corresponding to the sample's reflectivity compared to a standard white surface. The tristimulus values can be plotted on a chromaticity diagram to visualize the color's hue and saturation.12

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