Ange Tuteur wrote:This will only change the background of the iframe, not the elements in the window. Once the window is loaded the background color is determined by the color of the body tag on the forum itself.

I checked your forums sheet and didn't see this color. Try adding this rule to the stylesheet on your forumotion forum :
Display > Colors > CSS stylesheet

Code:

body { background-color:#FFF; }

Change #FFF to any color you want.

MrMind wrote:He has to change it through his forum because the javascript he gets is from his forum?

Code:

body { background-color:#FFF!important; }

Code:

#comments_scroll_container { width:100% !important; }