Grey background, no peticuliar shape of background, (it's background) , like the color of the wall in front of the office, the fleet color of the vehicles, or simply any business card will be either...
With so many students on these boards, if you haven't discovered Academic Superstore or JourneyEd online, you should check them out. You can save a LOT of money buying what you need for graphic design through them.
Academic Superstore seems to have a greater selection.
"I love deadlines. I love the 'whooshing' sound they make when they go by." - Doug Adams LinkedIn