For formal ceremonies men would have two additional items, a long gown with slits on either side, and a turban, usually in black or brown made of cotton or silk. In feudal times, there were strict dress codes. Ordinary people were not allowed to wear clothes with dyes other than black, brown or white. Costumes in yellow were reserved for the King. Those in purple and red were reserved for high ranking court officials, while dresses in blue were exclusively worn by petty court officials. Men's dress has gradually changed along with social development.