Changing the color of nav links by page.

Hi all, 

Been trying to do this using the color palettes option but I find whenever I try to change the color theme it wont do anything. Then tried to resort to css on the specific page, but when I use the ID for the nav links on that page it also hasn't been doing anything. 

What I am trying to do is on my Contact page and UX design page is change the color of the nav links to white and keep it black on every other page for desktop. 

URLs are: 

https://www.kellyfaria.com/contact

https://www.kellyfaria.com/ux-ui-design

There is another page with this issue but I may just photoshop the dark part of the image out so it can stay black. These two I'd rather keep the banner images and have nav links white for accessibility purposes. For Ux page, because the banner image is a bit busy, i had to drop the contrast/shadows down so it has a dark overlay, so the title could be in white. The Contact banner is a video. 

If someone can help me figure out what to do (i'm suspecting using different IDs per page? so the css targets the nav links specific to the page maybe and not a global component?) that would be much appreciated. Also open to any other suggestions. 

Thank you worked for me!