I just remember ordering my 96 new, and there was a spot to check top color, but i ordered an Eddie Bauer, so it only came in tan, so I skipped that part.
I checked a few door tag decode sites and it doesnt say anything about top color on the door sticker, just paint code, and interior code, which would make it impossible to get you that answer in "black & white" (pun intended)
Then I went online and looked up the 1995 Bronco brochure, and that shows all the interior & exterior colors, and top colors, but no mention of what top color top you could get with each color paint. Obviously they wouldn't let you get a green bronco with a maroon top, but you get my point. Look it up, see for yourself if you'd like.
I still don't understand the concern of if the top was originally white, or black, just curiosity? If you think it's supposed to be white and it bothers you, paint it white, problem solved, you can have an OJ Bronco then. Maybe the owner was very anti-OJ and painted it black?