I agree with P Squared about the accent wall. this is how my little girls' rooms are. ** Light creamy paint, with one pink accent wall.... if you have an accent wall then you can go for a bright fuschia pink!**
Painting a room a bright colour can be a risk, as you could get bored of it after a while, so go for the accent... less to paint over if you change your mind :)
Go crazy on the accessories and furnishings i say :)
That's what I plan to do for my room.