Around line 1260 of your .css is where you change the color of the menu text
.genesis-nav-menu a:focus,
.genesis-nav-menu a:hover {
color: #00647b;
}
The #00647b is the same as the widget call to action button, but it doesn’t look good on the header background. You can use “inspect element” on your browser and play with it to find what looks good.
