Oh boy...
Panels used to be about the same grey here too, but they were always painted by the customer. When Diazed screw fuses came out of fashion only main fuse and meter boxes were that color. Breaker panels have mostly been light grey and the newer ones are white or off-white. Also there's been a recent effort to get rid of all metal surfaces close to electricity, so most panels are PVC, if they do have a metal door it's hinged on PVC and carefully isolated from the rest of the panel. Steel switch boxes have been banned for new work (other than extra heavy duty industrial) for more than 30 years I think.