Black,and black clutch/bag perhaps. Its a beautiful dress with alot going on, so you want to keep your accessories pretty basic in order for the dress not to over power you.
Hmm I agree that black and black would be beautiful but I also think that gold metallic stilettos with barely there straps would be great with that dress!
I would recommend black for all your accessories. Also, I would not wear a necklace with that dress, maybe just a pretty pair of hoops or one chunky bracelet. Btw, the dress is lovely!