how can i make a inherited style from a diff ?

[LuisManson]

Hi, i had buyed a theme with thre different colors, which are 3 different XMLs, but they are the same on a 99% and i was wondering if i could run a diff with one of them as a base and generate two new XMLs for importing them as inherit styles...

this way i do not have to edit templates on three themes...

my isuee is what i have to keep for this to work...

the code boxes bellow are some diferences between them (differences in bold), my main concern is what part of the similarities do i have to keep for this to work...

IE: in the second code block, can i keep just the .navbar and background property or i need the whole .navbar block ?

		<template name="additional.css" templatetype="template" date="1279496101" username="aa" version="4.0.5"><![CDATA[@charset "UTF-8";

.navbar {
	background:url(images/styles/xx/style/navBG_blue.gif) repeat-x top left;
	position:relative;
	height:73px;
	font:{vb:stylevar navbar_font};
	color:{vb:stylevar navbar_link_color};
	width:100%;
	padding:0;
	margin:0;
}

.thead_bar .theadrow {
	background:#256e97;
	display:block;
	width: 100%;
	float: {vb:stylevar left};
	position:relative;
	line-height:20px;
	font-size:11px;
	border:0;
	border-bottom:1px solid #e7e4dc;
	border-left:1px solid #c4c0b5;
	border-right:1px solid #c4c0b5;
	color:#eae7df;
}

			<div class="footerLogo">
				<a name="top" href="{vb:raw vboptions.forumhome}.php{vb:raw session.sessionurl_q}"><img src="images/styles/xx/style/footerLogo_blue.png" alt="{vb:rawphrase x_powered_by_vbulletin, {vb:raw vboptions.bbtitle}}" /></a>
			</div>