and just to complicate the fray...don't forget the blue/brown rule. If it's blue and lighter than midnight/navy then brown shoes are the order of the day. Shouldn't be a problem since any lighter blue worn for evening/formal occasions would be in the kilt not the accessories or jacket (light blue formal atire only works at the prom level).
I generally use a black or brown, wingtip slip on with kilt and tassles for informal up to semi-formal and 5 eyelet oxfords (no wingtip) for serious semi-formal to formal.
Ah well, such was the influence of a gentleman's gentleman on a young and impressionable boy.

Mike