Hi everyone!

so my website is basically done :) yay finally. One of my remaining issues is the background. What i am trying to do is have the white background in the main body of the site (where the info is) and then on the left and right side instead of being white i would like it to be a like greyish colour. an example of this would be http://www.greatrep.com

on this site they have the white centre body and then grey on the outside.

my website address is www.purplemushroom.com.au

any help would be greatly appreciated

thank you

Tim