If you research colors and the moods they reflect in us they say a soft yellow is the way to go for creativity. In our last home I did this and it was fabulous. Yellow is supposed to be the color for creativity....like red is supposed to make you hungry. It's an interesting subject.
Why not go get some paint strip colors from a paint store and see what they do for you in your room. Now you can purchase those small jars of colors to test out and see how you feel/enjoy their look. Can't remember but I think the softer blues and greens create relaxation.
Just remember it's your room and you should choose what is most pleasing to you and gives you that happy feeling every time to go in there to create your beauties...