You will have to find this code:
function doHighlighlight(div) {
div.setAttribute('style',"background-color:#3375A2; color: white; border-top:0px;");
div.style.cssText = "background-color:#3375A2; color: white; border-top:0px;";
var y = 0;
for (var x=0; x<lastHighlight.length; x++) {
if (isChildOf(div,lastHighlight[x])) {
y=x+1;
}
else {
lastHighlight[x].removeAttribute('style');
}
}
lastHighlight = lastHighlight.slice(0,y);
lastHighlight[lastHighlight.length] = div;
}
And edit the colors there. You can edit it in something like notepad or detach the file from the template to make the edit in Dreamweaver.