Selecting “Brave Settings” in the top-right dropdown menu opens the settings page as a new tab.
This page is in itself a set of tabs, displayed horizontally across the top. The first is “Settings”.
In the “Appearance” section a little down the page you can select Brave colors in a dropdown, choices are “same as windows”, “dark” and “light”.
Selecting for example “dark” (my preference, easier on the eyes in a dimmed-light office) sets all the horizontal tabs (Settings | Brave Rewards | History | Bookmarks | Downloads | Crypto Wallets) to the chosen theme EXCEPT Brave Rewards which remains bright or unchanged.
This is inconsistent and seems like a slight and sloppy cosmetic mishap, which is a shame for such an otherwise great piece of software that Brave is. Small detail, easy fix