Section 102(2) in Delhi Prisons (Transfer of Prisoner, Labour and Jail Industry, Food, Clothings and Sanitation) Rules, 1988
(2)Female convict officers shall wear the same articles of clothing as ordinary female convicts, but dyed black in the case an overseer, and yellow in the case of a convict warder with the leather badge with brass buckles and words denoting their engraved thereon. All convict officers doing duty outside barracks at night shall be provided with blankets and great coats in winter time.