How do I make the background image of a page template blank?

Hi,

I am trying to change the “full page template” so that it doesn’t have the stripe that on other pages is the background for the sidebar. Here is the code for the template. Can anyone tell me where and how to change it?

<?php
/**
 * @package WordPress
 * @subpackage U-Design
 */
/**
 * Template Name: Full-width page
 */

get_header(); ?>
<div id="content-container" class="container_24">
    <div id="main-content" class="grid_24">
	<div class="main-content-padding">
<?php       do_action('udesign_above_page_content'); ?>
<?php	    if (have_posts()) : while (have_posts()) : the_post(); ?>
		<div class="post" id="post-<?php the_ID(); ?>">
		    <div class="entry">
<?php			the_content(__('<p class="serif">Read the rest of this entry &raquo;</p>', 'udesign'));
			wp_link_pages(array('before' => '<p><strong>Pages:</strong> ', 'after' => '</p>', 'next_or_number' => 'number')); ?>
		    </div>
		</div>
<?php		( $udesign_options['show_comments_on_pages'] == 'yes' ) ? comments_template() : ''; ?>
<?php	    endwhile; endif; ?>
	    <div class="clear"></div>
<?php	    edit_post_link(esc_html__('Edit this entry.', 'udesign'), '<p class="editLink">', '</p>'); ?>

	</div><!-- end main-content-padding -->
    </div><!-- end main-content -->
</div><!-- end content-container -->

<div class="clear"></div>

<?php

get_footer();