Passage: On March 21, the King proceeded through the streets of Berlin to attend a mass funeral at the Friedrichshain cemetery for the civilian victims of the uprising. He and his ministers and generals wore the revolutionary tricolor of black, red, and gold. Polish prisoners, who had been jailed for planning a rebellion in formerly Polish territories now ruled by Prussia, were liberated and paraded through the city to the acclaim of the people. The 254 persons killed during the riots were laid out on catafalques on the Gendarmenmarkt. Some 40,000 people accompanied these fallen demonstrators to their burial place at Friedrichshain.

Question: what were the three colors worn by the King, his ministers, and generals?
black, red, and gold