I use the Breeze Dark theme on Kubuntu, which also works perfectly with GTK+2 applications, but it's not fully supported on GTK+3 applications like Firefox yet.

Because of that, I've set my system to use Breeze Dark for GTK+2 programs, and the light Breeze for GTK+3 programs.

However, the KDE settings window (GNOME Application Style) only lets me pick a single icon pack for both versions. Is it possible to use different icon sets for them? The "fallback theme" option doesn't work for that.

  • Please don't cross-post. If you want this moved to another site like [unix:se] then please flag your post. – phk Jun 29 '16 at 23:42
  • @phk I've got that post removed already. – user562675 Jul 2 '16 at 7:57

I don't have KDE installed right now to test. As I remember with Kubuntu 15.04, KDE was creating two files to override GTK theme settings.





As they are two separate file you can change them differently. But you may need to change them to read-only so KDE config tool will not able to change them.

I could find a reference with example: Archlinux Wiki - GTK

Basic theme configuration

To manually change the GTK+ theme, icons, font and font size, add the following to the configuration files, for example:

GTK+ 2:


gtk-icon-theme-name = "Adwaita"
gtk-theme-name = "Adwaita"
gtk-font-name = "DejaVu Sans 11"

GTK+ 3:


gtk-icon-theme-name = Adwaita
gtk-theme-name = Adwaita
gtk-font-name = DejaVu Sans 11

Note: The icon theme name is the name defined in the theme's index file, not the name of its directory.

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