Here's a picture of atomic80's interior. The speaker grilles, the door finishers, the dashboard side panels, and the trim piece between the PCM and the gear lever are in black plastic. The rest is Natural Grey leather, and indeed it's a bit brighter. In your case, you'd also get the rear console in black plastic. You'd definitely notice if it was not the same color as the rest.

I was going to mention the lighter carpets as well, but if you prefer them that way. The floor mats will be black, though. They're not available in dark grey.