Hi Michael,
The easiest way would be to change the css properties for your '#outerWrapper #contentWrapper' div.
In your home.css stylesheet, change:
#outerWrapper #contentWrapper {
background-image: url(../siteassistpro_images/contentWrapper_bg.jpg);
background-position: right top;
background-repeat: repeat-y;
height: 1%;
min-height: 0;
overflow: visible;
width: 744px;
}
to:
#outerWrapper #contentWrapper {
overflow: visible;
width: 744px;
background-color: #ffc315;
}
This effectively removes the div background image, and gives the contentWrapper div a background colour.