Any chance you all could post some pictures of yours? I have a Sport Green M3W and am not sure what color of tonneau cover to get. Thank you!
FWIW, I think the tonneau should be black regardless of interior colour as it picks up the contrasting exterior color, which is black (fenders, taillights and other bits, and if you do not have the Chrome Pack, the roll hoops and headlight buckets). Otherwise, it'll look strange w/o some exposed point of reference, as the interior will obviously be covered by the tonneau.