There are normally config files for GTK at ~/.gtkrc-2.0
and ~/.config/gtk-3.0/settings.ini
.
Qt themes are configured differently. For Qt5 and Qt6, set the environment variable QT_STYLE_OVERRIDE
. If you still use Qt4 for anything, config is done in ~/.config/Trolltech.conf
. Refer to the ArchWiki for help.
I personally prefer GUIs, though, so I'd recommend the following:
- For GTK 2 & 3: LXAppearance
- For GTK 3 & 4: Gradience
- For Qt: qt5ct, qt6ct, and/or Kvantum