I recently googled the word "color" and found some interesting web sites.
Color Psychology This web site goes beyond the usual stuff and tells you that opera singers have meltdowns more often in yellow rooms and that weight lifters can lift more in blue rooms.
Causes of Color If you have a child who asks a lot of questions like "Why is the sky blue?," you need this scientific web site.
Online Color Scheme Generator Pick a color from the large grid and you'll automatically get a selection of many colors that work well with it.
Test for Color Blindness
Color Lab Select a few colors and see how they look together.
Color Matters This is a comprehensive web site on everything color-related including a bulletin board.