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.

https://earthsky.org/?p=2875