QT programs on Arch in Dark Mode

REMINDER: You can install AUR-Helper for your convienience I used paru.
Alternatives are: yay, pikaur, pamac, trizen, yaah, aurutils.
Unsupported alternatives are: pacaur, aurman, yaourt.

GNOME

1. sudo pacman -S qgnomeplatform-qt5 qgnomeplatform-qt6 adwaita-qt5 adwaita-qt6 --needed
   or paru -S qgnomeplatform-qt5 qgnomeplatform-qt6 adwaita-qt5 adwaita-qt6 --needed
   
2. export QT_QPA_PLATFORMTHEME='gnome'

The packages are:

• https://archlinux.org/packages/community/x86_64/qgnomeplatform-qt5/
• https://archlinux.org/packages/community/x86_64/qgnomeplatform-qt6/
• https://archlinux.org/packages/community/x86_64/adwaita-qt5/
• https://archlinux.org/packages/community/x86_64/adwaita-qt6/

Xfce

1. paru -S qt5ct qt5-styleplugins --needed
2. export QT_QPA_PLATFORMTHEME='qt5ct'
3. Open qt5ct
4. Set your Style to gtk2.

The packages are:

• https://archlinux.org/packages/community/x86_64/qt5ct/
• https://aur.archlinux.org/packages/qt5-styleplugins