Hello Peter,
You can change the color code in the following css as per your need and then add it in “Appearance => Customize => Theme Options => Custom CSS Options” box:
/* Secondary Menu Text color */
.nav-secondary .catchbase-nav-menu a { color: #000; }
/* Secondary Menu Text Hover color */
.nav-secondary .catchbase-nav-menu li a:hover { color: #000; }
/* Secondary Menu Text Active color */
.nav-secondary .catchbase-nav-menu .current-menu-item > a,
.nav-secondary .catchbase-nav-menu .current-menu-ancestor > a,
.nav-secondary .catchbase-nav-menu .current_page_item > a {
color: #ec6307;
}