Styles & Templates > Style Manager > bbcode_quote
Here's the code
<div style="margin:20px; margin-top:5px; <if condition="$show['iewidthfix']">width: 100%;</if>">
<div class="smallfont" style="margin-bottom:2px">$vbphrase[quote]:</div>
<table cellpadding="$stylevar[cellpadding]" cellspacing="0" border="0" width="100%">
<tr>
<td class="alt2" style="border:1px inset">
<if condition="$show['username']">
<div>
<phrase 1="$username">$vbphrase[originally_posted_by_x]</phrase>
<if condition="$postid"><a href="showthread.php?$session[sessionurl]p=$postid#post$postid" rel="nofollow"><img class="inlineimg" src="$stylevar[imgdir_button]/viewpost.gif" border="0" alt="$vbphrase[view_post]" /></a></if>
</div>
<div style="font-style:italic">$message</div>
<else />
$message
</if>
</td>
</tr>
</table>
</div>
Style using CSS which can be edited in Styles & Templates > Style Manager > All Style Options