Hello Mbrooks,
Apologies for the delay in getting you an answer for the issue. You almost had it actually. It was just a matter of drilling down a little bit more. I spoke with one of the developers to see what needed to be changed and this is what he stated:
.secondary-menu li a:hover, .secondary-menu li a:focus {
color: blue !important;
}
.secondary-menu li a {
color: red !important;
}
It does need to be in the CSS editor. Remove the previous item you entered. The menu links have two colors. One for the color, and the second for the hover color. Since custom overrides won’t inherit colors in the customizer anyways – you can just throw !important there (as per the code above). so that makes secondary menu red and when you move mouse over it or toggle focus it is blue.
I hope that helps to answer your question!