[Yvonnewilt]

I'm sure this has been asked before, but after searching for a couple of days, I have not found it. I want to have a patterned background on the outside area, which I added in the html, body area.. however, the actual cart area where all of the content is, I want to have a solid color. Can someone please direct me to the area I need to go to set this color?

Thank you for any help!!