tristimulus

/traɪˈstɪmjələs/
adjective
  1. Relating to or denoting three primary stimuli, especially in color science where three values (such as red, green, and blue) are used to represent a color.
    • Color monitors use a tristimulus system to display images.
    • Engineers adjusted the tristimulus coordinates to match the desired shade.
    • The tristimulus values of the paint were measured with a special device.
noun
  1. A set of three values that define a color in a color space, typically based on the response of the human eye.
    • The scientist compared the tristimulus of two different light sources.
    • Each pixel's tristimulus determines its appearance on screen.
    • The tristimulus of the sample was recorded as (0.5, 0.3, 0.2).
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