custom background

im trying to setup this theme for a site but i do not see anyway in having a custom background image for the white area below the picture of the person with the boxhead
http://themetastic.com/buddypress/?wptheme=BuddyPress%20Social if you go here where you see widget areas
its white on the background.

when i view the sourcecode to try and pick out the elements it does not show any css code that i can pick out this section and add custom css to.

thanks