I have been drooling over this bag for months and I think I have to have it. Lately I've been buying fun, colorful bags from the HH sales...so now it's time for a classic, goes with everything bag. This is where the RM Nikki comes in. But the question is, dark grey or black? They look very similar online so would really appreciate fdbk from owners! (In pics below, black on left, dark grey on right). Thanks!