What are the personalities of each of the m&m colors?

I think (not sure, but I think) that the orange M&M is peanut er. The yellow one is supposed to be the lovable clueless one and the red one is the more sarcastic and suspicious one. The green one is milk chocolate, if I'm not mistaken. As for the blue one, I think they made him like a young fun guy since he was the "newer" color and isn't he milk chocolate also? Wow, I never thought I would retain that much info about candy characters!!!