Yes it’s the stylesheet. IDs you should be looking at:
#body-container (strips down the side of the content area)
#main-nav ul li#current a (the current nav button)
#main-nav ul li a:hover, #main-nav ul li a:active (mouseover for nav)
Not sure if you’re trying to change the background of the nav too, but that would be the #nav-container id.
Hope that helps
John
I’m no expert and only just starting using WordPress myself. Using Firebug to identify the code you need to be looking for to change the border you need to look around line 18 for this and change the hex code for the desired colour:
#body-container {style.css (line 18)
background:#01203C none repeat scroll 0 0;
margin:0 auto;
overflow:hidden;
padding:0 12px;
width:942px;
Hmm…For some reason it didn’t work.
I changed the css codes, but there was no effect. Could it be something to do with the theme?
#main-nav ul li#current a
background:#0C386E none repeat scroll 0 0;
}
#0C386E is the blue color in your home tab
#body-container
background:#01203C none repeat scroll 0 0;
margin:0 auto;
overflow:hidden;
padding:0 12px;
width:942px;
#01203C is the current left and right border color … I think.
[EDIT] refresh your browser or force a reload (CTRL +F5) after making changes.