Want to change Anchor Nav Color automatically when scroll to that section

Hi there, 

I am trying to achieve one functionality for my client's website and that, homepage have 5 sections with anchor div code on top of each section. I want the color of menu to change automatically if user scroll to lets say "About" section. 

For reference please have a look on that website "http://www.fireandflourbread.com/" Its being build on squarespace. 

Is it possible with 7.1 version? Any help would be highly appreciated. 

Kind Regards
Moeez

Hi,

This will require JavaScript code (need a Business Plan or higher). Can you share link to your site? We can check easier