I learned a trick on YouTube when having the pink/red tint problem on the s8 and s8 plus. If you still see a weird shade of white even though your blue light filter is off, I know this sounds weird but, download google books if you don't already have it and go to read a book. If you don't have one there are free ones I think. When "reading" it, there will be a font option that looks like the same symbol from Microsoft word, the double A. Click it and swipe the night mode option to off. Made a world of a difference for me when the built in display settings weren't cutting it.
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