Black-Tie Optional
NO, YOU CAN WEAR ANY COLOR! Black-tie optional is slightly less formal than black-tie attire and allows more flexibility when it comes to your ensemble. Men are not required to wear tuxes, but it's a plus if they do. Women should wear full-length dresses, but if someone is wearing a mid-length dress, it would be acceptable.
Women: Avoid anything above the knee. Men: Sport coats, Khaki Pants, Short Sleeves.
Women: Mid-length, tea-length, floor-length gown, or a formal suit. Men: Suit or Tuxedo; ties are optional
Please refer to the guide above for any clarification.