In your style.css change these:
.main-navigation li a:hover {
color: #yourcolor;
}
for the main navigation on mouse over
.main-navigation li ul li a:hover {
background: #444;
color: #yourcolor;
}
for the drop down-menu on mouse over
and
.main-navigation .current-menu-item > a,
.main-navigation .current-menu-ancestor > a,
.main-navigation .current_page_item > a,
.main-navigation .current_page_ancestor > a {
color: #yourcolor;
font-weight: bold;
}
for the current page or category
If you want to have the current sub-category also to be highlighted with a custom color,
also change this:
.main-navigation .sub-menu .current-menu-item > a,
.main-navigation .sub-menu .current-menu-ancestor > a,
.main-navigation .sub-menu .current_page_item > a,
.main-navigation .sub-menu .current_page_ancestor > a {
color: #yourcolor;
}
replace ‘yourcolor’ with the color of your choice. Should work ?? Let me know