A cardigan is a the perfect addition to complete a fall or winter business casual outfit. Pairing a navy blue cardigan and tie can make the outfit feel more professional, and add some personality. If you do choose to wear this outfit, personalize it further by rolling up the sleeves. This outfit looks great with a watch. Leather watches, especially in a work environment can influence how you are perceived in a very positive way. Matching the leather of the watch, belt and shoes makes this outfit work very well.