Fashion

Just get the formality level right between those as well as only one of sock/tie/pocket square that’s ‘out there’, if they are all shouting then it’s dandyism not style.
And don’t forget the belt.

If you go less formal on the shoe (suede) don’t have a fine silk tie or square.
You wouldn’t have a knitted tie with patent shoes for example as they are too far apart.
You get plenty of leeway but the extremes will not work in harmony.

Ok cool. For me, a well fitted shirt and suit is by far the most important part of the show, the other bits are sprinkles. Like @Mr_Smyth said, don't go jazzy socks and jazzy tie. Pocket squares are nigh on impossible to not look a bit try-hard unless plain white.

I like these Shibumi ties