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LivingOnThinIce [S] 2 points ago +3 / -1

Interesting that the "natural" is the opposite of "man-made"

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BilbroNaggins 3 points ago +3 / -0

It's more like the pigment is the "repel" of x color and the absorption of the rest of the colors, - white being the repel of all colors and black the absorption of all colors- so in this case is natural that pigments and light are opposed.