Hi, my apologies if the title sounds confusing. I worded it best I could.
I'm using a customized Truly Minimal theme, and would like to add a background image to my site. However, I want to create a white box around the side widgets as well as the main content column to stop the background images from showing up under them like this:
http://goo.gl/b6Xcas (shortened url link to dropbox image screencap)
Any help would be greatly appreciated. Thank you :)
The blog I need help with is blackespresso.wordpress.com.