In spite of the stolen content problem, this topic is quite interesting.
I have read somewhere that green (but I think they were talking about light green, not pea-like, as mentioned above) is beneficial for offices or classrooms. Someone here also said clover-pink or sort of mauve is good for bedrooms, and I can confirm from my experience that a light mauve or sort of light clover-pink is very comforting for a bedroom.
I was never very fond of bright colors on home walls. I had my kitchen painted orange once and it was not bad, though. I don't think I could cook in a black or red kitchen.
Back where I lived many people painted their walls white, but I had two problems with that: 1. it looked too much like hospital, 2. spots were very easy to see.
Hope I did not get you bored with all these.