1) Your 'logo' is actually header_bg.jpg and the blue borders, around your logo, are part of the pic. Also, the borders around your shop are from a graphic as well.. contentBG.gif
2) If you are looking to change the background color of the boxes, that's also a graphic.. box_center_repeat.jpg
3) The color code block to change the 'Home/Log In' links are in your color.css
Find..
Code:
#navMain ul li a:link, #navSupp ul li a:link, #navMain ul li a:visited, #navSupp ul li a:visited, #navMain ul li a:active, #navSupp ul li a:active {
color: #FFF;
}
#navMain ul li a:hover, #navSupp ul li a:hover {
border-bottom: 1px dotted #FFF;
}
FYI, there are parsing problems(typos) in that template..
In your stylesheet.css search for 1C82BC, there will be one without # in front of it.. add it.
In your layout.css, search for #navigation, add a space before your margin value.. margin: 0;
Finally, in your colors.css, search for a.category-links.. in that line, there will be hove instead of hover.. add the r