Vertical Scroll Indicators without FullPage.js


I want to have a scroll indicator on my vertical navbar. If I am in the first section (they are all 100vh) than i want to have the color of the text “home” to be orange. If i scroll down to the next section i want the “Über” text to be orange and the “Home” Text to be black again.

Doesn anyone have a clue on how to do this?

Here is my public share link:
(how to access public share link)