If you wanted to directly modify the templates instead of using the template editor, you'd simply open up the CSS file that is causing the change for your template.
For instance I'm using the beez_20
template on my Joomla site, and it has a grey background by default for the entire page, and a white background for the area around the content.
My theme's personal.css
file contains this CSS rule for the body
tag causing the background to be grey:
background: #e0dedf url(../images/personal/bg2.png) repeat-x;
I changed this to:
class making the background white:
I changed to blue:
Also finally the #contentarea
class making that section white as well:
Which I changed to grey with:
Here were the results of those quick edits, please don't critique my color scheme as I was just trying to show very clearly what each one did :)
If you happen to be unaware how to directly edit files on the server, you can take a look at our guide on how to edit a file on my server
which covers some various methods.
I hope that answered your specific question, if I misunderstood what you're trying to do please clarify a bit what end result you're hoping for and we can provide further assistance.