i need some resto input for the tank tracks. here's how they looked originally



as you can see, they used some kind of dark grey / black rubber mat, probably the same used on star wars and stuff (impossible to tell what color it was back then)!
i have two replacement options: either classic black ...

... or light grey

compared with the color of the track sideart, the light grey would fit nicely, but when viewed from the front, i'd say the black fits in better with the black front of the cab. what do you think? black or grey?