Ubb_instant_uvvcode.tmpl gives two instructions that are different, regarding colors:
code:
<td bgcolor="#666666">
<a href="javascript: x()" onclick="DoColor('#666666');"> </a>
creates a color with "#"
code:
<a href="javascript: x()" onclick="DoPrompt('color');">?</a>
creates a colornumber-instruction without #.
Both works, but the user should only see (and learn!) one of the possibilities so that he isn't confused. I would assume: add a # to the latter one.