Flatpak apps don't follow KDE's accent color

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1

Hey !

I noticed that flatpak apps, namely Thunderbird and Zen, don’t follow my accent colour. The colour is basically the only « theme » I applied, I otherwise use Breeze, default icons, default everything. I don’t really know how to make flatpak apps follow my accent colour, truth is I thought these kind of issues were fixed some time ago with portals…

Kubuntu 25.10
KDE 6.4.5

Does anyone know how to have flatpak apps use the right colours ? Thanks !

2

You can set the theme on a per application basis, which is what I do for those pesky flatpak apps that don’t obey. Here are my notes on how to it:

  • rightclick on the titlebar of the app (eg zen, etc): more actions->configure special application settings
  • click “add property”, search “desktop”, add “desktop file name” property
    in text field, add the prefix of the name of the .desktop file it uses to run, eg “zen”

Hope that helps.

3

Thanks for the answer. For a system-wide fix, a user on Reddit gave those commands, which work :

flatpak override --user --filesystem=xdg-config/gtk-3.0:ro
flatpak override --user --filesystem=xdg-config/gtk-4.0:ro
sudo flatpak override --system --filesystem=xdg-config/gtk-3.0:ro
sudo flatpak override --system --filesystem=xdg-config/gtk-4.0:ro
4

Very cool! I’ll give this a try. Thanks!