Jaye Marie and Anita Dawes

I’m going to start a new, um, thingy?, on Thursday’s, just for a bit of fun.  I’ll describe something, and you need to tell me what it is I am describing.  Ready?

I’m going to hold back comments til later tonight, so no one sees the other’s answers.   ;)

I’m always hanging around doing nothing.  The best part is people always look for me, but I am never lost. My favorite color can be found in a rainbow. I’m not crazy about the two on either side of me.  They make me feel like an alien.  But, that’s okay too, because if there’s ever a problem, I know they have my back.

What am I?