Regex Pattern Matching

Say I have a stylesheet, and I want to grab certain values out. For example, I need the the script to parse through this:

<style type="text/css">


table, tr, td { background-color:transparent; border:none; border-width:0;}
body {
	background-color:fd00c2;
        background-image:url('bg.gif');
	background-attachment:fixed;
	background-position:bottom left;
	background-repeat:no-repeat;
	 }

table table { border: 0px }
table table table table{border:0px}
table table table {
	border-style:solid;
	border-width:8px;
border-color:000;
	background-color:fd00c2;

PHP:

and I needed to grab these parts out

border-color:000;

PHP:

body {
	background-color:fd00c2;
        background-image:url('bg.gif');
	background-attachment:fixed;
	background-position:bottom left;
	background-repeat:no-repeat;
	 }

PHP:

. And another thing is, the code could be jumbled up aswell, as in, body { } could be at the bottom of the file.

How could you match up, and grab out these sections?

This is what I've got so far:

<?php
$code = stripslashes($_GET['code']);
preg_match("~(.*?background-color:.*?)~", $code, $bgcolor);
echo $bgcolor[0];
?>

PHP:

If I knew how to understand what all this .*?~ etc is in the pattern matching, I'm thinking I could

find the body { section then echo everything inside it, until it reaches the next }, and for the next part I could look for the table table table { section then echo the border-color:000000 until it reaches the next } and so on.

Then theres the problem with if all the code is on one line!