Hi @jamesra, to change the primary menu color you need to write custom CSS code that goes like this.
.biography-nav-left .main-navigation a {
color: #FFFF00 !important; /* change HEX color value as you like */
}
Paste this code in Customize -> Theme Options -> Custom CSS .
But it’s Pro version has this ability to change the color simply from Customize -> Colors section without any headache :).
Refer: http://themepalace.com/theme-instructions/biography-pro/#HowtochangeBasicColorOptions?
Hope it helps solving your issue.
Regards