Thanks to the architecture in our eyes, we see but a small subset of the hues that make up the visible spectrum.
We only have three kinds of cones, or color-sensitive cells, to make sense of what could be millions or even hundreds of millions of colors. We still do a pretty good job of it — normal human eyes can pick out about a million different colors, far more than we have ever come up with names for. Still, we could conceivably do better.
More cones would detect more combinations o