One of our favorite ways to decorate is to start with a white canvas. We find this works particularly well for childrens' spaces because many childrens' furnishings and accessories are saturated with color.
If you start with a white canvas, you can build in color with furniture, toys, and textiles and the good news is that almost anything goes. You won't need to worry about staying within a color scheme. The photos of this house in Sweden found at Emmas Design Blogg illustrates this concept beautifully.
Images: emmas designblogg
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Love! We're doing this in our nursery, since we're painting the cribs a kelley green - no need for crazy color on the walls.
A huge white wall fan here. I used to be big on colors, but I began to love how colors from the items of the room would pop out w/ a white wall in the background.
I am planning out my kids room (in my head) for when we move into a bigger place. I am really loving the idea of being able to change the color of the room with things like bedspread and curtains. I have this vision of having a few different bed tapestries/lanterns/artwork and being able to switch them out every 6 months or so. I already painted one of the larger walls in the place where we live now a bright white and its really transformed the room.