I think if you want to wear the tan boots with the dress, you’d be better off wearing sheer black tights rather than opaque black tights as it will look nicer. In fact at that length, would you even need tights? A classy, long coat on whilst you’re outside should suffice.
It depends on what your pairs of boots are like but I agree that the tan ones don’t suit the dress very well. I’m an ankle boot girl, and I wouldn’t wear them with that dress. Court heels or sandals would look better. Even white trainers if it’s a casual occasion