This is something I thought of when I was a little kid, but I know I'm not the only one who's thought of this. Perhaps people here know the answer. I didn't know where to post, I guessed it could have belonged in Biology, but this has to do with beauty, as colors are very important to me and I'm sure others. Everyone sees their colors differently. What looks like green to me may look like purple to you. If you saw what I am seeing it would look like a Dr. Seuss world. We would call them the same things, and label them the same, and compare them the same "yeah it's yellow, like the color of the sun," because we all receive the same wavelengths of light and have the same labels for them. It's just like taste. I know things must actually taste different to different people, based on taste bud layout or what not. I know this because if a pea even so much as touches my tongue, it automatically effects a gag reflex. People who wolf down thier peas can't have the same perception. I know people have the same red/green/blue receptive cones in their retina and get the same light. I believe the difference is in the image the brain fabricates based on this input. A picture of the visible part of the spectrum or rainbow would still look like smooth transitions between violet and red for everyone, it would just look different.