I tried playing with the VideoEQ on my 5080HD. Can't eliminate the 0% reddish tint. I lowered the Red value to 0 from 64, no difference.
The problem is not the video processing. Its probably physical. I did notice that the red issue is most noticeable directly in front of the TV. Also, the screen needs to be black for extended amount of time like when watching 2.35:1 content. With black on the screen for a very long time, I started to notice heavy red on the corners and edges of the screen.
Finally, 10% white/gray is a little reddish. It is suppose to be beyond visible range by the numbers. But when I corrected it, the overall image is just a little less warm.