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What primary color scheme should SoylentNews have?
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(Score: 2) by maxwell demon on Sunday March 02 2014, @06:18AM
Actually, even for "normal" people, three colours are not really enough to mix all existing colours. Especially the spectral colours cannot be mixed out of other colours.
With three appropriately chosen colours you can, however, get a large part of all colours (and a good approximation for the rest), and it happens that the best choices contain one red, one green and one blue colour — although the standard choices like sRGB can be far from optimal as can be seen e.g. here. [wikipedia.org]
Note that the display of the colours outside the sRGB triangle in the image is necessarily wrong. But then, the choices of base colours are affected by other considerations (for example, from the colours alone, the optimal choice for red and blue would be a spectral colour very close to the border of the visible spectrum, but there our eye's sensitivity is low, so you'd probably need ridiculously — if not dangerously — high intensities; also you're limited in what colours you can actually produce with reasonable effort, which I guess is the reason why the green colour of sRGB is so far away from the optimum which would be monochromatic light with a wavelength near to 520 nm).
The Tao of math: The numbers you can count are not the real numbers.