The background of slideshow2 is controlled by an image which you’ll find in:
template.css (line 1194)
#ja-topsl .inner {
background:transparent url(../images/topsl-bg.gif) repeat-y scroll left top;
margin:0 0 0 5px;
padding:0 0 10px 10px;
}
You can either change the color of the image…or delete the image entirely and replace the line with a color code.
For instance “background: #c25902 none repeat scroll 0 0;” would cause the background color to match the burnt orange color of the menu items in the default theme.
Be careful though…once you change the background you may also have to change the other elements that appear in slideshow2…for instance, in the demo, the background of “highlight module” will need adjusting.
Have fun.
John.