What is formal?
There are four categories of formal:
 
White Tie (or Full Dress)
Classic Black Tie
Morning Wear
Creative Black Tie

Creative Black Tie

The evolution of formal fashion brings a host of different styles and colours for the formal function that invites individuality. Combine: either tails, dinner suit or coloured dinner jacket & black trousers (tuxedo), formal shirt, formal vest, formal neckwear and pocket hanky... in any colour!

 
What makes my outfit formal?