A color for my 7yr olds walls?

I was actually thinking something really bright like a neon green but I really like the red comforter with his bedroom set and am not sure if that would clash. I know u can't see the room good in the pic but you can get the idea, very basic, furniture is the same as the bed. No other decorations to have to match up.
theme(racing,outdoors,firetruc... you can get stick on wall kits to use and it could encourage his imagination.
a seven-year-old probably has his or her own ideas on what color would be most agreeable for the walls of his or her bedroom. you can always offer another choice if the child's choice is too awful, but let the kid make a decision--it's good practice for life.
Light Blue, with a Wood Trim.
Why not do 2-3 colours. You could "stripe" his room using the green, plus yellow, blue, and red in differing widths. Then put up pics of different things he likes. His bedding would still work in the room but it would have a different energy. Also consider a stripe at about chest-eye height of chalkboard paint. Then he can "change" his room any time he likes by erasing and re- drawing it.
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