I'm glad you asked! Black-Tie Optional is defined as: guests have the option of wearing their most formal attire (think: an evening gown or tuxedo) but can also choose to wear a formal suit or cocktail dress instead. So, you have some flexibility. Men: A tuxedo is NOT required; however, you are free to wear one if so desired! Otherwise, you can select a formal suit and tie. Women: Floor length gowns are encouraged, though not mandatory! A formal cocktail gown is completely acceptable. Finally, you do NOT have to wear black. We would love to see any and all colors should you choose!