We are about to do up DS's bedroom for his 13th birthday. Getting rid of the bunk bed, all the childish stuff etc. He has a light grey painted wood floor but we need to repaint the walls. It's quite a small room and not that light... what colours would you suggest we do it in pls... it needs to look cool and not too kiddie... and also needs to stay until he's 17!! I've looked at blues but some just look nursery-style. Green too. Grey just feels boring. Help! What do your teen boys have?