Leather Necktie Prom Dilemma.. HELP!?

Prom Dilemma.. HELP!? - leather necktie

I'm going to a man about my prom ... and we should bear .. formal, I wonder whether it official? ..
Silver-sleeved polo with black and gray jacket and tie, slacks and leather shoes. .. Is it appropriate?
if not .. Suggestions? .. please! .. Thank you! :)