This is where you get to have a little fun.
You can play it safe with the rest of the outfit and still sneak in something unexpected. A little color, a great print, something that doesn't take itself too seriously — sometimes that small bit at the pocket is exactly what the whole look needed.
Weddings, parties, date nights, or just an excuse to wear the good jacket — whatever you're getting dressed for, the details are where you get to make it yours.