My old room had three lighter blue walls, with one greenish (almost like a robin's egg) wall. I loved it. It was simple enough and blacks and greys looked great with it.
my old bed was white and my shelves were black. And I had various picture frames in black, silver (grey), and white. The color really made the room brighter, but the furniture and accents kept it neutral and classy. This is part of it. I don't have any pictures of the overall room.
This is the blue part (ignore the pokemon poster. I'm not THAT grown up.
And this is the greenish part (ignore my face hogging the picture, it wasn't meant to be a picture of my wall, but it shows the color best.) Snapshot_20101115_11 - Copy.jpg
If you can look past the not exactly great pictures, you can see it.
I loved it. I don't live at my dad's anymore and he re-painted over it, but I re-painted my boyfriend's and my room the same color scheme. He loooves the girlyness.