Go to your gnome instalation location `~\geany\share\themes\Prof-Gnome\gtk-3.0` and change name of `gtk` file to 'gtk-dark'. ![Zrzut ekranu 2024-07-22 180406](https://github.com/user-attachments/assets/f0371c2d-b9ff-4f0d-975c-50a7cf20a...) ![Zrzut ekranu 2024-07-22 180452](https://github.com/user-attachments/assets/4e35319c-2155-4f1c-985d-59b20aea6...)