The appearance of the widgets in the QtDragon UI can be customized through the use of stylesheets. Upon initialization, QTVCP searches for stylesheets in the users HANDLER folder. If none are found, it will apply a default style from the /usr/share/qtvcp directory. To change the current style, press F12 (while the UI has focus) and interact with QTVCP's stylesheet editor dialog. This allows a user to easily modify an existing stylesheet or create a completely new and customized one. Any existing stylesheet could be used as a starting template.
See https://pypi.org/project/qtsass/ for more information.