Interesting primer on color and perception. I was hoping however, that you'd go a bit further and expand on the topic like this article:
http://science.howstuffworks.com/impossible-colors.htm
What if there are colors within the visible spectrum that our cones and brains can't see?
Now that is a brain-twister. Apparently it can be done, which is very interesting.
This is real cool stuff.. thanks you guided me to it :) Interesting !!