iPhone 5 pink hue in center of the screen

I've searched around but haven't heard of something like what I'm seeing on my iPhone 5 before. I've seen reports of pink hue on the entire screen.

There is a pink rectangular box on my iPhone screen with a white border. Its most visible when the screen is showing white. The screenshot I've taken is using one of those screen flashlight apps to show full screen white.

At first I thought it was my eyes or my new glasses but other people see it too.

Has anyone seen something like this before?

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EDIT:
Ok, I just noticed the green also shows a similar defect. The blue and black screens looks totally uniform.
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