Force Breeze theme on stubborn apps

Hi, how can I force stubborn apps like OpenRGB to use Breeze?

Screenshot of OpenRGB attached, it looks like it uses Fusion.

If it’s a gtk app, go to settings → colours & themes → application style → configure gnome/gtk application style and make sure it’s set to breeze.

It’s Qt, but I found the problem

halvar@halvar-ms7e56 ~> QT_STYLE_OVERRIDE="Breeze" openrgb --gui
Connected to server
Network client listener started
QApplication: invalid style override 'Breeze' passed, ignoring it.
        Available styles: Windows, Fusion

so it looks like it just doesn’t support Breeze.