Applied directly to the <body> tag of every vBulletin page, the Body class is arguably the most important of the CSS classes used by vBulletin.
Its main use is to control the background color of the outermost portion of pages.Unless overridden by subsequent CSS classes, the Body class also sets the color of all text seen on vBulletin pages.
All links in the outermost portion of vBulletin pages, and for that matter, all links unless overridden by subsequent CSS classes, will be controlled by the Body class.
Example of element using this class:
<body> <!-- The BODY tag uses this class --> </body>