XYZ does not provide correlates of hue, lightness, brightness, chroma, colorfulness, saturation, blueness–yellowness, redness–greenness, or the like Y = relati

XYZ does not provide correlates of hue, lightness, brightness, chroma, colorfulness, saturation, blueness–yellowness, redness–greenness, or the like Y = relative luminance, XYZ are tristimulus coordinates, and x, y or u', v' are chromaticity coordinates. These are all physical rather than perceptual quantities.