i never had an insurance company ask for the color of my car, so i don't think it matters. it's not the first time i have heard someone ask that, so maybe so some do.
a 2dr will cost a tad more, nothing to get worried over. maybe $50-60 a year more. as the car gets older the difference won't matter as much. with my 5th gen 4dr accord, it's only $24 a year more to insure it as a 95 prelude since i have an H22 i asked about that scenario.