GTK theme doesn't seem to work on all apps

[vagrant iron]

I have set a custom GTK theme in the settings. It works pretty well on most apps and on Flatpak as well. However, certain GNOME apps don't seem to respect this setting and just use the default Adwaita-dark theme. I can't really figure out why this is happening. Editing the theme's CSS files directly is tricky, because it's archived in a .gresource file.

[hallow cobalt]

It's mostly due of an gtk library that seems to be failing, and a few gtk themes will be pretty much useless when gtk4 gets in

But some themes actually does not work in Cinnamon properly

[vagrant iron]

Is there a way to fix this library issue? The default Mint-Y theme seems to be working, so why can't this? I would even try modifying the theme itself if that is necessary

[hallow cobalt]

I dont know, some gtk themes just doesnt work on cinnamon

[zealous dust]

It may be because your theme does not provide GTK3/4

[delicate roost]

it's the way GNOME Apps always are, and it really sucks. Best you can do is search synaptic for nocsd and read its description and install it and reboot. will at least fix the titlebars for ugly gnome apps.

[delicate roost]

this may a valid reason for the wrong colouring in the window body of the gnome apps.

[vagrant iron]

Hmm, I looked at the theme's files and there are folders for gtk3.0 (and different versions of it) and gtk4.0. I'll have to look into this. Maybe there's something in the CSS file I can change

[zealous dust]

Strange. Im not sure.

Try installing a temporary desktop environment like Weston to see if the issue occurs there

[vagrant iron]

Idk if this is a false memory but I remember it working on previous installs

[zealous dust]

Weston should run within cinnamon

[vagrant iron]

I have fixed it!

[zealous dust]

well done! what was the fix?

[vagrant iron]

I had to add a line GTK_THEME=Plata-Blue-Noir-Compact to the /etc/environment file and restart