The Language of Color

"The Color Purple", "out of the blue", "caught red-handed", "Orange Crush", "yellow-bellied"... colour is important to us humans, so much so, that we incorporate it into our everyday dialogue, without so much as giving it half a thought. The Sensational Color web site takes color and color concepts to a deeper level: they have documented all sorts of "color-isms". In particular, I like their section, "Color Meaning & Symbolism"... a great cheat sheet, for when you have to 'splain away concepts and use of color, etc. It's all there, in black & white.