Modifed the main menu so that background in main_menu-menu.css matchs the content  background, as follows:

.main_menu-menu li {
background-image:url(‘/img/eosbaga2b.jpg’); <!– Modified by GRP. Background color was #003366 –>
}
.main_menu-menu li li {
background-image:url(‘/img/eosbaga2b.jpg’); <!– Modified by GRP. Background color was #003366 –>
}
.main_menu-menu li li li {
background-image:url(‘/img/eosbaga2b.jpg’); <!– Modified by GRP. Background color was #003366 –>

Of course, the content background is ever changed in global-styles.css, main_menu-menu.css will have to change too.

Also changed hover color in code just below the above.