One of my favorite explanations of color balance...

The fine folks at Cambridge in Color have a very helpful explanation of color balance. (among other things)

The concepts behind light and color are key to the work we do with images both in the field and in post. Check out the article which includes several solid visuals...

TimK

Sasquatch...The Loch Ness Monster...and Magenta

I came across this article on biotele.com (a site that calls itself the "neurostimulation portal" which seems appropriate, looking at the home page design) that explains why...spectrally...magenta does not exist.

It's an interesting article for those of you who are interested in color theory and how the human brain perceives color.

TimK