
“In the country for dinner parties with neighbors, and especially in his own home, a man may wear a velvet smoking jacket, usually navy blue, burgundy or dark green, with a black bow tie, dinner jacket trousers and evening slippers. While this dress is acceptable for the host, it would not be right for a guest to wear this for an event with the dress code black tie actually stated on an invitation, which effectively means a dinner jacket.” – Debrett’s Handbook