I don't mean red yellow blue brown, I mean 4 very distinct shades of the same color family. My wife can't decide which ones out of three. I said why not pick four and I will paint each wall one color. You can look at it and in six months tell me which one you like most and I will paint it homogenously, or if no decision is made we keep it as four colors.
Other than cost, or having to deal with whether the wood fascia will follow the color pattern, what would be the disadvantage?