you need to change the colours in the file.
Code:
case UC_SYSOP:
case UC_ADMINISTRATOR:
case UC_MODERATOR:
$arr["username"] = "<font color=#A83838>" . $arr["username"] . "</font>";
break;
case UC_UPLOADER:
$arr["username"] = "<font color=#4040C0>" . $arr["username"] . "</font>";
break;
Hope this helps