Welcome to Styleforum!
The tie you are wearing is quite bold; I'd go with a white linen pocket square (note the linen part, nothing shiny!) To bring stuff down to earth a little.
I should also note that the CM section of Styleforum takes fits VERY seriously. As you're new and this is your prom (AKA you haven't been doing this very long) I'm going to pass on the critique, but if you post that in WAYWT, expect excoriation.
With that said, this is an AMAZING community;...