Christian Froeschlin  wrote in message <497f5baa@news.povray.org>:
> (color vision with receptors for three wavelengths common on Earth).

A small correction here: the three sorts of cones are not sensible to just
one wavelength each, they are sensible to a whole range of wavelengths. Each

wide, and there is a lot of overlapping. Otherwise, we would not see
rainbows as a color gradient but as three thin colored stripes.

The reg, green and blue of sRGB are not artifacts of the human eye, they are
technological choices. To cover a reasonable range of the set of visible
colors the cheapest way possible, three primary colors, one around the reds,
one around the greens and one around the blues or the violets, are
necessary, but the actual precise value of these three colors is not a
physical or physiological property, it is just an arbitrary choice by the
industry.

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