Damn these glue people. No idea how this silly farse has permeated so many minds.
Its not glue, its NEVER BEEN GLUE. It will not change or go away.
This happens with every launch. I got a yellow 5S on launch day and took it back. Finally just got another this week, perfect screen.
I got an Air today and guess what: not uniform. Yellow on lower left. I'm marching that crap right back into the store.
I am so sick of Apple pulling this crap. Demand excellence!
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Mine is kind of darkish/dirty on the left, pink on the right. (bad) Luck of the draw.
OP, you can't compare screens from different devices. You can't even compare screens from different examples of the same device.
Unfortunately, there are too many variables.
Exchange it. Please. And have them note the reason.