I am not sure about the early model 260Z, but here are the colours for a late 1977-on, based on some photographs I have of NOS parts. The rear spoiler is satin black and the light cluster surrounds a mid-satin grey, which also matches the front grille and front spoiler (although most front spoilers now seem to be finished in black) . I am not sure if it is exactly the same, but certainly a similar shade of grey paint is found on the late model aluminium road wheel detailing.