body
{
background: [b]#A1E4FF[/b] url(images1/empty.gif) bottom left fixed repeat-x;
color: #7B8E6B;
font-family: verdana, arial, helvetica, sans-serif;
line-height: 135%;
font-size: 12px;
margin: 0px;
padding: 0px;
border: 0px;
}
the blue color for the background.
.background2a {background: url(images1/background5a.gif) top left fixed repeat-x;}
.background2b {background: url(images1/background5b.gif) bottom right fixed repeat-x;}
TWO background images, the clouds and the main part, though I don't see why you can't combine the clouds with the map itself and just have the blue as a color.
http://www.amaranthia.com/themes/amaranthia/images1/background5a.gif
http://www.amaranthia.com/themes/amaranthia/images1/background5b.gif