My front camera is flashing colours?

For some reason when I put my iPhone 6 screen close to my sheets, skin, underware ect, with the front facing camera on, in the dark. It will flash or not fade multiple colours. (The screen, that is) but it won't do it to certain things like my face.
I really don't know what it is and its kinda creepy.
The colours include green, purple, pink, blue and red.
It will always start at green, then go blue, pink, purple and then finish at red.

No dead your indian

I'm having the same problem

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