Today's featured workspace shows that sticking to one colour scheme can be bold and interesting. The big blueprint canvas covering the wall has a huge impact on this otherwise minimalist space.
It helps that even the floor is white to match the desk and the lamp, and the blueprint naturally fits the blue-and-white colour scheme. House to Home/Homes&Gardens created this setup and lists the sources for the desk and wall canvas. I'm thinking you might be able to create the same effect with blue paint -- or maybe even use blue chalkboard paint as your backdrop.
Design ideas: decorating with blue and white [House to Home]