Sheffield United will wear their home kit for the 2025 English Football League (EFL) Championship play-off final on Saturday, 24 May at Wembley Stadium.
Both teams traditionally wear red and white stipes.
However, as the Blades (3rd) finished a place higher in the league, they were given first choice.
Sheffield United told BBC Sport that they will be wearing their traditional home kit, black shorts and black socks.
Sunderland have confirmed they will wear their white, navy and green away kit, featuring a retro badge on Saturday.