It happened that I got in possession of one of this devices, with severe purple-pink color on display when camera it is on, indoor or in low light places. I haven't noticed anything wrong with the camera before night came, same day I bought the phone.
I was comparing camera side by side with a Nexus 5, when I started to see some purple on the down side of the HTC one, where the touch arrow and home button is. And then the research started. Read more: