Chosen Solution
Most of these iPhones have a yellowish tint to them. I made sure night sight is turned off. Is this caused by the optically clear adhesive (OCA) or just Apple QC.
You don’t really give us much to work on…are all of these Apple original screens or do they come from various suppliers and/or refurbishers? I highly doubt there would be this much variance on true original Apple screens, this looks more like what everyone always says about “you get what you pay for” in aftermarket screens.