I was thinking the same thing as dianeva. It would be like imagining a new color. Your brain can imagine what it would be like even if there isn't a color like that. I wonder how much our perseption of our senses very even amoung normal people. Would the color blue look the same if you saw it through someone elses perseption of the color blue that they established when they were babys. Maby it is similar though, we may never know.