Kindly point towards theory/material to read for understanding colors and what makes a good color combinations. Mind it that I am not interested in say "Color combinations for web application" etc. More of the lines of say "Colors and humans".
Material free to read is what i am looking for.
Color and humans is a very complex topic. Scientists do not completely understand how we humans perceive color. (See also http://en.wikipedia.org/wiki/Psychophysics)
There are a lot good books out there but some free resources I use:
http://en.wikipedia.org/wiki/Color
http://en.wikipedia.org/wiki/Color_vision
http://handprint.com/HP/WCL/wcolor.html