I kept them black and white and used a single tangle for the background...sort of like wallpaper. I really like how all three of these turned out.
The background tangles are
I wanted to try some color. I'm not very comfortable with incorporating color yet (or even shading for that matter), but I'm glad I tried it. Two of them use watercolor pencils and one was Bic Mark-It permanent markers and colored Microns.