Hi @a_s, I used qt5ct package which is QT5 Configuration Tool. First, install it:
sudo apt-get install qt5ct
then set variables in LXQT Session Settings:
QT_PLATFORM_PLUGIN
QT_QPA_PLATFORMTHEME
to value “qt5ct”.
Logout/log back in. And then run qt5ct tool in terminal:
qt5ct
I set Style to “breeze” and Color Scheme to “darker”.
