Sting 3 - Colour decisions

I've made some small thumbnail samples of the eye closing in on the gun scene. But I am not sure whether to have it in colour with skin tones or black and white so that it can link in with the colours of the gun. After drawing this it helped me get a visual idea of what it would look like. I have decided to go for the coloured eye; as I can always edit it on after effects to make them black and white so that I still have the option.