'Black tie' is a term used for a certain dress code. If an invitation or event announcement specifies a 'black tie' dress code, it means the occasion is festive. The proper dress is a black or dark blue dinner jacket with a white shirt, white pocket square and a black bow tie. Plain black shoes with a thin leather sole are the proper footwear for this occasion. Ladies wear a floor-length evening gown. Typical black-tie events are visits to the opera, balls and the Academy Awards.