So you want to be able to modify the body's background color? you are going to have to rely on your client ot be a little css savvy for this. but you could create a new contentArea for each page named "BodyStyle". In that content area, go to code view and enter an inline background style to be used by the body tag such as:
then edit the body tag to add the developer notes:
<body <?php echo WA_getCMSContent($database_localhost, $localhost,"testpage", "bodystyle"); ?>>
I guess you could even just have them type the color name for the content area:
and edit the body tag to place the CSS in front of it:
<body style="background-color:<?php echo WA_getCMSContent($database_localhost, $localhost,"testpage", "bodystyle"); ?>">
either way, this is relying on the client to enter a valid color css color name.