[geekmaster]

I recall reading that folks with the fourth color dimension are always female, for genetic reasons. Our reduced color perception to them would be like the two dimensional field of view of residents of Flatland are to us in the third dimension. Even imagining what we are missing is like trying to draw a tesseract. And even their expanded color space is a mere sliver of available frequency spectrum. There is so much we cannot see, without our specialized imaging technology. And from a physics point of view, color is merely a perceptual illusion.