Defective phone or just the way it is?
Brightness set to automatic and black background. When reading with the Kindle app, the text on the top of the screen are white. The text at the bottom of the screen seem pink-ish. If you change to a white background and brightness set to automatic you can see the difference in the top half of the screen from the lower. Less noticeable as you increase the brightness but still there.
The screen on my surface doesn't do that.
Brightness set to automatic and black background. When reading with the Kindle app, the text on the top of the screen are white. The text at the bottom of the screen seem pink-ish. If you change to a white background and brightness set to automatic you can see the difference in the top half of the screen from the lower. Less noticeable as you increase the brightness but still there.
The screen on my surface doesn't do that.