Temporary fix to red tint issue
I've found a temporary solution for the red tind issue with a display overlay app.
1% Brightness :
10% Brightness :
These settings on my phone gives neutral color
Suggestion for @Anders_ASUS @LP_ASUS @CH_ASUS you could see that greens and blue are always higher than reds. Keeping these sliders fixed (though I've changed) there is an inverse relation between "brightness" and "filter strength" .
Brightness ∝ (1/ filter strength)
May be you could use these knowledge to find a solution.