Again, yes. Particularly in clusters, I can detect differences in the colors of stars.
Wow - sounds like you have more sensitive than average color perception.
Do you think you might be a tetrachromat?
Nope. It probably helps to live away from cities and such, in that there's a lot of stars visible at night. And it's not like looking at a rainbow: they're tints, not intense color differences.
'endogui linked to an article that talks about this: I don't think it's all that unusual.