[lepton]

If further studies prove the approach is safe, he said, it could be used in people to correct colorblindness and perhaps to add a fourth color receptor, which would allow a finer parsing of the spectrum.

"You'd think that the color world of a tetrachromat would be very rich compared to ours," Neitz said. With our way of printing and conveying colors on television, it would be wierd...as nothing in either of those mediums would look at all like what they were attempting to convey. For example, "Yellow" could be yellow light, or the same exact shade could be a mixture red light and green light with no yellow light whatsoever.

[null and void]

One's favorite color might go from purple to bee purple.