Not long ago, I discovered that by covering my camera’s lens with aluminum foil, I could take interesting pictures. Not pictures of actual objects, but pictures of all the pixel errors and thermal noise in my camera’s image chip. I figured that, since I have an iPhone 4S handy, I’d see what darkness looks like according to its camera. Apparently, the abyss is pink and green:
Sublime Curiosity 
That’s an interesting experiment. I suspect that the severity of this effect (total area of distribution) would be linear over the phone’s operating temperature.