In Avian II template;
To duplicate the blue background;
Find template.css and in that file find the line (line 27)
body#bd {
background: url(../images/grad1.gif) repeat-x top #292929;
color: #CCCCCC;
padding: 0 0 40px;
}
Replace it with;
body#bd {
background: url(../images/grad1.gif) repeat-x top #233859;
color: #CCCCCC;
padding: 0 0 40px;
}
To create the blue top margin and to colour the content area grey;
Again in template.css find the lines (approx line 837);
#ja-wrapper {
clear: both;
margin: 0 auto;
width: 950px;
}
Replace it with;
#ja-wrapper {
clear: both;
margin: 5px auto;
width: 950px;
background-color: #333333;
}
This worked in my test.