15 Interesting facts about colors

The first colour used in art was red – from ochre. And the first known example of cave art was a red ochre plaque, which contains symbolic engravings of triangles, diamond shapes and lines, dated to 75,000 years
ago.

It derives from the spectrum of light (distribution of light energy of different wavelengths) interacting in the eye with the spectral sensitivities of light receptors.

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