I like this particular chart of the emotional, physical, and behavioral effects of different colors, but the whole post is one of the best explanations of color I've seen. Explanations here for primary, secondary, and tertiary colors, as well as complementary, analogous, triadic, and warm/cool colors.
I've always loved Freuds work from day one back in year Always so quirky and odd and interesting and have always strongly believed in the input of the unconscious and subconscious mind for how this controls our thought processes.
Introverts and extroverts, very good chart that makes it more clear what it means to be introverted and extroverted. Introvert does not = shy, extrovert does not = obnoxious (although you can still be those things and be introverted or extroverted).