Recently, our work room is a dark room, where the computer screen is so bright for me, even the screen's brightness is turned to the minimum. After some digging, I found the application `NegativeScreen` would help me.
To make the screen darker 50%, the configuration should be made like what shown below.
The explanation of the transforming matrix is shown as following image.
ref
GitHub - mlaily/NegativeScreen: NegativeScreen is a Windows application allowing you to invert your screen colors. (and more)
https://github.com/mlaily/NegativeScreen
Using a Color Matrix to Transform a Single Color - Win32 apps | Microsoft Learn
https://learn.microsoft.com/en-us/windows/win32/gdiplus/-gdiplus-using-a-color-matrix-to-transform-a-single-color-use?redirectedfrom=MSDN