Had mine 2 months or so and now just looked to see and yeah, it's there but did not notice till I checked because of this thread. Total non issue IMO. Thanks for pointing it out tho as I woulda never have known.
I only see it if I go looking for it. Since I don't intentionally use the phone at off angles it's not an issue. But I also understand that this is just something that happens with OLED screens - and I like the OLED screen on this phone to be concerned about something that's just an inherent issue with them anyway.
... and just like that you are controlling your breathes. I never noticed it until reading this post, but it does shift to a greyish/blue color. That being said, it doesn't bother me. Seems like any other phone/computer/TV screen I've ever looked at.