Need help with GSAP Navbar

[paulopanganiban]

Hello wonderful people. I need help with my navbar, 

 

So the codepen demonstrates the perfect animations I need, the only thing I'm lacking is once the navbar is on the very top of the view port, return it to its original color and not red. I don't want to use CSS classes for this but rather use full control of scroll trigger and timelines. 

 

I'm using this with React and Styled-components, I tried using toggle class and with start and end markers, no avail  

 

 

Thank you to anyone whose willing to help! 😃

See the Pen LYOQJzZ by paulopanganiban (@paulopanganiban) on CodePen

[paulopanganiban]

All good for this one. I just added scrub: 1, and start positions