Longtime Chrome user switching to Brave, and love it, BUT: 
I’ve always used 3 different colored themes for my 3 Profiles, so I can easily see what account I am working in. But in Brave, the basic color themes produce very dark (nearly invisible) Navigation buttons. And they are inverted. to me. (ie. if there is a back option, but not forward, it is the “>” that is bright, and the “<” that is nearly invisible.
Of course, when the window is in the background all three buttons are visible. I do utilize one gray theme of my three. And the effect is more what one would expect.
Maybe this is just how it is, on Brave. but it makes it very difficult to see.
3 screen shots:
Shot 1 shows what it looks like when a Back-but no Forward-navigation is possible,
Shot 2 shows when both Back and Forward is posible.
Shot 3 shows The top window having only a Back navigation possible. (This is what I would expect to see: Highlighted option, grayed out not an option.) Note that in the two windows not current ALL three buttons are highlighted. But under no circumstance is the Bookmark tool anything but dark. (I have home button off, but it also shows up, only dark.)
I’ve looked through the threads and the only other thing like this that I have found is where someone said the buttons “disappeared” when they opened a Private window. But this is a bit different.
Any ideas?
**Brave Version( check About Brave ): Version 1.2.42 Chromium: 79.0.3945.117 (Official Build) (64-bit)
