Oscommerce - bg color change

Hi, I need someone to help me figure out where to change the BG Color of columns left, right and main content area? I have searched the entire stylesheet and havent been able to find it? I looked in the relevant php files too! I need to change the grey/black colour to the light blue as seen at the url below. As you can see I have only half managed to do it: http://www.goonlinewebdesign.com.au/genvet-draft1/store/index.php I am pulling my hair out hair, having spent the last 5 hrs trying …