Getting gray instead of white when recording screen activity
Wow, this was a VLC problem. Its the playback of the video recording that has got darkened!

The left program is "Film &amp; TV" provided by windows.

If I in VLC was unchecking the option "use hardware conversions YUV -> RGB", the playback was not washed out anymore. Describe in https://wiki.videolan.org/VSG:Video:Color_washed_out/.