These particular costumes were worn by the first guards we see when Indy and his friends arrive at the Pankot Palace, and the guys guarding the doors when arriving at the Banket.
At the first look, we can think they were used by the servants at the banket, but paradoxically, these costumes are more detailed than the servants' whereas they appear only in the background... Maybe the most beautiful of the three different costumes i own.
More from Indiana Jones and the Temple of Doom (1984)