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There's more to colour than the cie chart; where's brown?
Quote from: Bored chemist on 12/08/2008 18:39:53There's more to colour than the cie chart; where's brown?That needs to be mentioned - thanks.Brown has the same chrominance values as yellow. It just has a lower luminance value.The cie chart normalises luminance in order to get things on one two-dimensional scale. The full graph would be a vertical column to include luminance. 'Sludgy' colours only look sludgy when held against brighter objects. I was fascinated to learn that, apart from the luminance values, skin tones are more or less identical for all races. I guess that means that the pigment is more or less neutral.The eye / brain are too smart for their own good, sometimes. Between them they do their very best to eliminate the effects of illumination. If you cut a hole in a yellow card and put an identical card behind the hole, if you can manage to get a really deep shadow on the yellow bit behind (and you can suspend disbelief a bit). The rear bit will look brown (ish).Failing that, use Photoshop (o.n.o.) and look at the RGB components of a yellow and a brown area of a picture. You'll find their ratio is much the same although their absolute values differ.