Thanks Bojan, mrtom414 and Kathryn.
Hi Kathryn – Thanks for providing the CSS and recommending the Jetpack custom css plugin!
I actually achieved the desired result with the CSS below. Is this not recommended?
#menu-main-menu li > a:visited {
background-color: #a41010;
}
#menu-main-menu li > a:hover {
background-color: #a41010;
}
#menu-main-menu li > a:active {
background-color: #a41010;
}