dragonfly66 on "How to change the background color of one page in twenty twelve"

I am building a static site, no posts. I need to have one page only have a different background color than the rest. I have a child theme and have been playing around with it but the css change is global. I'm thinking there is a way to do this by using the page id/name but when I use Firebug I don't see anything specific to any page.
http://finishingstrong.dvkweb.com/