My iphone 5 turned black and white. Went in to settings -accessibility- vision and undid the invert colours. So now it is even more black, like a neg. Have read all your answers, but nothing works. When you say home button, do you mean the main button down on front? Thats where I click 3 times right? So have accessed _accessibility-from there to. Still doesnt work....So in anyway, also did restart it of course. Update: so I had to reset it. so now I have colours!!!