Reply To: Drop down menu color

You were probably using an old theme that was at least 5 versions ago. There were changes on the menu markup that I mentioned on the theme changelog and also on wordpress.org where #menu-main was changed to #nav-main.

Try this:

#nav-main,
#nav-main .sub-menu,
#nav-main .children {
    background-color: #013567;
}

#nav-main .sub-menu li, #nav-main .children li {
    border-bottom: 1px solid #000000;
    border-top: 1px solid #013567;
}