How to Change the Body Color?

The body color is withe in all the color styles, i would like to replace the body color to mach it with the background, or make it transparent

test run

http://dallasblvd.com/mainsite/

 

Or better how to make the main container in body transparent and add color to menu background. thx

 

.main_container{
background:black;
}

this worked

 

so far i have all this...

#menu li a.selected {
color:red;
}
#menu li.current_page_item a, #menu a:hover {
color:red;
}
#menu li a {
position:relative;
colorrange;
}
.main_container{
background:black;
}
.container{
margin-top:30px;
}
.slider {
margin-top: -20px;
}

 

I'd like to have a different background color in the logo area and the rest of the body other color.
I think it will be something like this:
.main_container{
background:white;
}

.header{
background:black;
}

How can i make this possible?

 

Your website looks wonderful i was wondering how did you create your store page, if i may ask