Avoid cool colors...green, blue.
Consider warm colors...deep reds, cranberry, eggplant...and dark tones. I personally find a dark room the most conducive to listening and getting lost in the music.
Lighting is as important as paint.
Or, play it safe with earth tones, but I'd still prefer deeper colors.
BTW, I don't entirely practice what I preach, since our living room doubles as our listening room. Our walls are faux finished to look like antiqued glodenrod. We do, however have deep cranberry red drapes and halogen lighting that can be dimmed quite low.
Have fun. let us know what you decide.