Hunt effect (color)
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The Hunt effect or Luminance-on-colorfulness effect[1] comprises an increase in colorfulness of a color with increasing luminance. The effect was first described by RWG Hunt in 1952.[2]

Hunt noted that this effect occurs at low luminance levels. At higher luminance, he noted a hue shift of colors to be more blue with higher luminance, which is now known as the Bezold–Brücke effect. The Hunt effect is related to the Helmholtz–Kohlrausch effect, where a saturated stimulus is seen to be brighter than less saturated or achromatic stimuli.
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