My room was already white paneling (that i hope to paint an egg shell white eventually) and I accent with blue based on the rug I love.
The advice I would give would be to choose either a lamp, or a rug that you love to look at and choose a color from that as your accent. Then choose a neutral for your walls. That way it will be easy to switch out to another accent color or add one whenever you like.
Here are some views of my craft room:
More Views of My Creative Place as I like to call it are on my blog