Navigation menu text color on mobile devices

Hello,

I changed the header text color to be white, and it works okay on the computer.

But when I click any of the links on the navigation menu un the mobile browser, the text turns from white to black. I don’t want the text Color to change to black, it’s not visible.

Note, the chosen color of my links is red.

Kindly assist. Thank you.

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