Nav Menu Non linked/Custom linked active color

Hello,

Am facing issue with Nav Main Menu Non linked/Custom linked active color. Here Concepts and Support that have no pages, They’re just meant to be guides for the dropdowns.

Here am using white color for Active Main menu Like Home and i want same color for Concepts also when user visit on Concepts Sub-Pages.

Thanks

The page I need help with: [log in to see the link]