Header Background CSS

Hey, can anyone here, that is knowledgeable in CSS, help me?
I own a PHPBB2 forum at http://shinobilegacies.forumotion.com/forum.htm, and I was wondering if there was a code I could put into my CSS Stylesheet that would allow me to put a background behind the banner, that was not part of it.

Hello,

You can use this CSS code...

Code:

.bodyline tbody {
background : url(IMAGE URL HERE) repeat-x top;
}

What would I use to put a color behind it instead of an image?

Code:

.bodyline tbody {
background : #COLOR HEX CODE HERE;
}

That would work.