Default dark mode?
Using Loupe 44.0 from Flathub:
Even though my system is in light mode, there are a few apps that I expect to open in dark mode anyway, the ones related to photo and video. For instance, EyeOfGnome and Totem are opening with a dark interface even though the rest of the system is light.
So it’s something I would expect from Loupe too, especially as the background for displaying images is dark and Gnome top bar is black too: a full Loupe window look like a white horizontal bar over a mostly dark screen.
Maybe that has been discussed already?