Luis, don't take that colourized pic to represent the Overall Colour of the A6M2-N the more accurate colour is an Earth Colour called Tsuchi-iro or I3 it has been likened to FS16160, while fabric surfaces were a light to medium grey.
see image of Nakajima Zero artifacts colour reference, metal and fabric surfaces, my apologies for the source it escapes me for now but quite possibly J-aircraft.com, it can be found on the net.
see image of Nakajima Zero artifacts colour reference, metal and fabric surfaces, my apologies for the source it escapes me for now but quite possibly J-aircraft.com, it can be found on the net.