How to remove white borders on dark mode in macOS Catalina?

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How to remove white borders on dark mode in macOS Catalina?


Ever since I updated to Mojave I hated the fact that they put white borders on every window and on the dock in dark mode like those ones:

How to remove white borders on dark mode in macOS Catalina?

But because of this post I was finally able to remove those borders from the Dock by replacing dockbackgrounddark.png and dockbackgrounddarkax.png from /System/Library/CoreServices/Dock.app/Contents/Resources with blank files. I was to happy that it was possible to do that:

Before:
enter image description here

After
enter image description here

I then spent hours of searching through resources so I can find where the borders for the apps are located at but I couldn’t find anything and I really want to find them. I would be so thankful if anyone could help find those.

It is possible to adapt / suppress the white border on app windows as well?