However, when the top image is converted to grayscale, we have the image on the bottom-a single shade of gray. The yellow (second from the left) appears to be much darker than the magenta (right-most). It appears in both self-luminous and surface colors, although it is most pronounced in spectral lights.Įach color on top has approximately the same luminance level and yet they do not appear equally bright or dark. This brightness increase by saturation, which grows stronger as saturation increases, might better be called chromatic luminance, since "white" or achromatic luminance is the standard of comparison. Kohlrausch ) is a perceptual phenomenon wherein the intense saturation of spectral hue is perceived as part of the color's luminance. The Helmholtz–Kohlrausch effect (after Hermann von Helmholtz and V. ( December 2020) ( Learn how and when to remove this template message) See Wikipedia's guide to writing better articles for suggestions. This article's tone or style may not reflect the encyclopedic tone used on Wikipedia.
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