DS (6yr old) wants a full on Red bedroom. I think it will look like a cave and would normally only choose neutrals. So I would like the red to be contained to 1 wall (he has red curtains and grey & red bedding and I'm prepared to paint the trofast toy storage red too, so there would be red elsewhere in the room too). But he says he doesn't want "boring white/magnolia" on the other walls.
What colours can I put on the other walls that won't be overpowering, dark, too "in your face" or clash? Or how can I persuade him white or magnolia is best for the other walls?