Some females (due to the XX chromosome setup) are born with red cone receptors that are sensitive to sufficiently different ranges in the wavelength spectrum that they are in effect tetrachromats. I particularly remember reading somewhere that when asked how they experienced the world they had reported to often notice bad color matchings in the way people dress, I suppose much like it can sometimes be apparent that someone is red-green color blind by this same dressing queue.

But a different kind of rod altogether, firing off some completely different signal, who knows what the experience would be like. Psychophysics is a mysterious junction indeed.