I am using Cinnamon on Arch Linux with a dark theme (specifically Vertex Dark). The dark theme leads to undesirable behavior in some apps where the foreground color is hard-coded to a dark color but the background color uses system colors.
One way around this is to create a
~/.local/share/applications/<myapp>.desktop file which sets a different GTK theme. However, Keepass doesn't seem to be respecting the
GTK_THEME environment variable. In the shell, if I try:
env GTK_THEME="Vertex" keepass
The Keepass theme doesn't seem to change at all. I suspect that this is because Keepass uses Mono for cross-platform support, which has some rough edges and doesn't always behave like native applications. Is there a different variable that I should be setting for Mono apps?
(Note that there appears to be a similar unanswered question on AskUbuntu).
Edit: Looking into this a bit more, it seems that KeepassXC has really matured since I last looked, so switching to a naive application is a feasible option. However, I'm still interested in learning whether or not there is something that can be done.