What colors should I use in a room where...?

...I need to feel both relaxed and focused? Basically I want my bedroom to double as an office/studio of sorts, since I have a lot of writing, painting, and other creative endeavors going at once. So I need colors that are relaxing enough to sleep around, but not so calming that all I want to do is lounge and nap! Does anyone have suggestions for color schemes that would work?