My cousin was REALLY into the primarys for her first son. One wall, Blue, one red, one green and one yellow. The room is very fun, playful and awesome. She used reds in the crib which was on the blue wall. It looked great. I'll try and find a pic. Anyway it was a fun painting party and now that he's 3 and has a big boy bed, he has yellow sheets and blue comforter. It's really easy to coordinate in that room. Good luck with it... and just go with whatever makes you happy and at ease in the room.