Semi formal help!?

my three friends and i are going to semi formal and i need alot of help because i agreed to help them with dresses, shoes, etc

friend # 1 is a bigger girl, plus size, gorgeous red hair and i was thinking an emerald green dress. what style would be good? and what shoes would be good. pointed toe? open toe? or rounded toe?

friend number two, kiera knightly type, very slender, maybe a b cup, brown hair, shoulder length or shorter. what color dress and what color shoes would go with it and.

friend number three, very short hair, purple right now but we're probably dying it. i was thinking a red dress and her having chocolate brown hair, what color shoes and would a different color dress be better? what hair style would be good for her short hair. spikey? sleek? any suggestions? thanks!

Semi formal help!?

It depends on the style of dress.. Or the style they are looking for. But for the girl with the brown dress.. She could wear gold open toe heels..