Looking for color used on 70 road runner
 

This might be a silly question, but I'm thinking about painting my satellite the same color, or something very close, that was used on "the hammer" which is a 1970 road runner. It's a gunmetal silver metallic, but I'm not sure how I would go about finding that color. Any help would be awesome.

It is made by BASF under the product name Glasurit. Sterling Grey is the color.

It is also BMW Sterling 472