How to change post title color when post is scroll up in top menu bar?

[s123]

In Light theme I changed color of top bar to dark blue color. When I scroll post up it show post title color in Black. I would like to change post title color to white. What custom css I should add to make post title color white.

thanks!

[awesomerobot (Kris)]

If you right click anything in your browser you can inspect the element. This will give you the details you need to add CSS. For example:

So you’d want to add:

.extra-info-wrapper .topic-link {
  color: white; 
}

[s123]

@awesomerobot, thank you so much!