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wasoxygen · 2200 days ago · link · · parent · post: Everything you ever need to know about how the eye sees colors
But, alas, this color space has some unhelpful properties. For one, not all triplet values (also called tristimulus values) are physically possible. Consider the LMS coordinates (0, 1, 0). To physically achieve this coordinate, we would need to find some way of stimulating the M cones without stimulating the L or S cones at all. Because the M cone’s sensitivity curve significantly overlaps at least one of L or S at all wavelengths, this is impossible!