
Originally Posted by
Galcobar
Depends upon the event, and the shade of navy.
Such tuxedo jackets became popular because under early 20th-century artificial lighting (gas and electric) midnight blue actually appeared darker than black (hiding lint too). Under sunlight or colour-correct lighting the blue becomes apparent, so if at a truly formal event you'll want to adhere even more tightly to tradition. Under black tie optional you have some leeway as you'll be compared to people in suits, and under creative black tie it's pretty much anything goes.
If you want to appear traditional, don't forget the waist covering of a cummerbund or deep vest.
Studs are an area where some flexibility is allowed except under the most formal codes. A plain-front shirt (no pique nor pleats) is the least formal and should use mother-of-pearl buttons.
Also, shirts with plackets covering the buttons have become more common. Properly that lesser formality is balanced with the more traditional shirt material. A stiff pique bib (along with pique clar and cuffs, aka Marcella) is still more formal than the pleated front, never mind the plain soft front. Pleats, even the tiny ones preferred post-WW2 and today, are typically found on soft-front shirts; it's a matter of argument whether such shirts should fasten with mother-of-pearl buttons rather than studs.
Then you can get into collar styles, etc. All that text, and it's back to the first sentence: it depends upon the formality of the event and the shade of blue.