A couple of years ago, one of my fabulous aunts painted a bedroom gray. All furniture and accessories were either black or white. It was gorgeous! So, of course, I copied the idea for our guest bedroom. The walls were gray, everything else was either black or white.
I liked it, but felt like something was missing. In Northwest Arkansas, Razorback Red is a favorite color! So, one wall and the window valances were painted Razorback Red. That did the trick! Now, I love the guest bedroom!
here and here!