A dinner jacket (British English) or tuxedo (American English, also colloquially known as ��tux”), dinner suit, or DJ is a formal evening suit distinguished primarily by satin or grosgrain facings on the jacket's lapels and buttons and a similar stripe along the outseam of the trousers. The suit is typically black or midnight blue and commonly worn with a formal shirt, shoes and other accessories, most traditionally in the form prescribed by the black tie dress code. In Britain, the word "tuxedo" often refers to a white dinner jacket.