A notice issued recently by the department directed all the students to wear white and black dress, officials said.
The officials said the students are free to wear the type of dress they want but it had to adhere to the colour code.
Boys are to wear white shirt and black or grey trousers in the classes while girls can wear skirts or salwar kameez but should stick to the colour code.
The Bar Council had recently issued guidelines to all law colleges and universities asking them to frame rules for a dress code for students.