The current situation
The existing title bar is white, enabling dark title bar will help us get a more unified UI.
The Target
Blender has done it
https://developer.blender.org/D14847
The Technology Path
Since Windows 10 1809, Microsoft has provided an API for modifying only the color of the window title bar.
The method reference is
stackoverflow.com/questions/39261826/change-the-color-of-the-title-bar-caption-of-a-win32-applicatio...
Documentation see
docs.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute 3
At the same time, this API does not affect compatibility with older versions, and on Windows 7 or earlier versions of Windows, the API will not work and will not cause strange errors.