Hey so I made this mock-up in photoshop. It's not very good, especially around the text, but it's good enough for a general ideaterragendarkmode.png
You should be able to do that on Windows anyway by changing windows UI colors. The framework using NT window management from what I remember. I used to change the NT window colour scheme for Terragen. Now I just change my node network colours.
Thanks a lot! I'll try that out.
For OP, and others, for Windows 10 you'll probably need something like: https://www.wintools.info/index.php/classic-color-panel
Update Regarding Above This registry changer doesn't include button backgrounds and some other UI elements so it's not complete.
Unless you're familiar witht the registry.
PPS this website has a easy dark mode app which may work too: https://www.wintools.info/index.php/easy-dark-mode