How to change background colour

I am working in Dreamweaver and cannot find the right file to change the background colour of the hot-ecommerce template in style 2 (I want it white). also I need to change colour of modules headers. Please, advice.

Hi,
in templates\hot_ecommerce\styles\Style2.php

$bodyText = "#272829";
$linkColor = "#bc9d10";
$backgroundColor = "#F5F1DE";
$headerBgImage = "2";
$contentBg = "#FFFFFF";
$logoTextColor = "#350608";

for heading color you need to change variable also it this file, here how it's defined:

div.moduletable h3 {
color:<?php echo $columnHeading; ?>;
background: -webkit-gradient(linear, 0 0, 0 bottom, from(<?php echo $modulesHeadingBgStart; ?>), to(<?php echo $modulesHeadingBgEnd; ?>));
background: -moz-linear-gradient(<?php echo $modulesHeadingBgStart; ?>, <?php echo $modulesHeadingBgEnd; ?>);
background: linear-gradient(<?php echo $modulesHeadingBgStart; ?>, <?php echo $modulesHeadingBgEnd; ?>);
-pie-background: linear-gradient(<?php echo $modulesHeadingBgStart; ?>, <?php echo $modulesHeadingBgEnd; ?>);
behavior: url(templates/hot_ecommerce/css/PIE.php);
position:relative;
}

this is in template_css.php

Sorry I am still a bit confused, as I am not a specialist in php. Can I make changes somehow easier, via css?
For example, I need to change background color of module heading (see screenshot 'findwithus.jpg' - arrow 2) and background of the menu and submenu items (it is black at the moment - see screenshot 'findwithus.jpg' - arrow 1).
I cannot find the file specified by FireBag to be able to make changes - see screenshot 'findwithus2.jpg', please.
my site - www.findwith.us

you can take that php code, strip php parts and put static definitions - pure css.

You can then put that below code that you took.