I thought it would be pretty cool to make a background by randomly stamping these cats and then masking them off to fill in the background with different textures. I'm crazy...it was a lot of work!
The paper and ink and stamps and masks were really flying, so I don't remember what colors I used for ink and paper. Let's just say assorted blues. I do recall using an Eggshell Prismacolor marker for shading and shadows. All of the stamps are available at Starving Artistamps.