As it stands, I have so far found it difficult to tell at a quick glance what page I am on in the Flea Market (this issue also found within the Custom Apparel store) while using Dark Mode.
(Flea Market page numbers)
There is no distinction whatsoever with these numbers and it makes it hard to tell what page you are currently viewing without actively keeping track of it.
This is less of an issue in the Forums, however I believe it could be clearer.
(Forums page numbers)
Let's compare this to the Light Mode version:
(Flea Market page numbers)
Numbers are clearly highlighted and it is very easy to tell which page you are currently on.
I'm not sure whether this is a bug or simply an oversight, but I thought I would shed some light on it anyways!