Most Helpful Girl
I've worn dozens of dresses like that, some in black some in colors, all kinds of stuff. If you like dressing up and you have the money to afford those dresses then you might be interested in LARPing. Now I can suggest several to you and you'll have to like role playing/dressing up in different outfits (not always those dresses, those are for feasts) and potentially fighting evil things with boffer weapons.
(LARP = Live Action Role Play)
But to answer your question that would probably be very pretty for prom.