Painting My Living Room 2 Different Colors?

I'm moving into a small home. The living room has 1 wall with all windows. I've painted that wall and the opposite wall light willow green and want to paint the adjacent wall a cream or beige. (Those 2 walls have the cathedral ceiling, also.) The carpet is a light beige.

should I paint both walls beige or just one of them?
I'm not sure at this point which way to go with this.

By Diane