I have played around with the stylesheets and can not figure how to change the background color of the table that is outside of this table. I have included a screen shot to try and explain more.
.tddetails {
background: #F11111;
}
That would be the body CSS tag usually unless that white area is something you programmed in which looks like it by the green color of the outer cell.
I have my default body set to the following code below but it still displays the white background. I am talking about the color within my circle that I have with the attached image in the first post. Not the green border around the whole page. Unless you think the color within the circle is a shade of green. If so I can assure you it is not. It might look that way because of the way I captured and had to shrink it.