Win 10 upgrade Colour Profile loss and quirk

[Stagecoach]

Just for info ..................................

Having undertaken the latest full Win 10 upgrade a couple of days ago my screen colours were off so I decided rather than just reset my default colour profile to my last calibrated one I would re-calibrate. Once done and the new profile set at default all was back to normal.

Late last night I noticed the screen colour had changed from what it had been although I had altered nothing. The following morning it was back to 'correct'.

What I found is that the upgrade had defaulted a System 'Colour Night Light' setting (user adjustable) that warms the colours to come 'ON' at 9 pm. This function may have been there before and turned off but I had never been aware of it.

[Manfred M]

Yes, Microsoft and others have introduced this function because some studies suggested that the blue light from computer screens may interfere with sleep patterns. They turn on a "warm" mode to try to counteract this, but the unfortunate effect is that it totally mucks up the colours.

I have disabled this lovely functionality on all my devices...