Actually, it would be:
HTML Code:
<body bgcolor="#000000">
and you can't wrap centre tags around the body.... you would have to put your entire contents inside this:
HTML Code:
<table align="center">
<tr>
<td>
ENTIRE SITE CONTENTS GOES HERE
</td>
</tr>
</table>
These are tips on how to do it without CSS... the preferred method is a bit more involved.
Regards, Mike.