So you posted the line... lol
<td width="' ,$context['TPortal']['leftbar_width'], '" style="padding: ' , isset($context['TPortal']['padding']) ? $context['TPortal']['padding'] : '4' , 'px; padding-top: 4px;padding-right: 1ex;" valign="top">
any tp style is in the tpstyle.css file.