Hi Andy, Thanks for reaching out. Relating to your question here, could you kindly elaborate on this. Is it that you want to alter the navigation bar background or the navigation menu items. Perhaps you can send a screenshot on the exact section or items just to avoid any sort of confusion.
I look forward to your reply. Best Regards, Support.
You can simply add custom CSS to change color of navigation bar. You can also add background image to your header or navigation bar. I am also using custom css to change color and header look of my website frackmanthemovie.com