white and black
Green Bay will be the home team. The Steelers will wear their white jerseys and the Packers will wear green jerseys.
White.
Black.
The Steelers were the road team in Super Bowl XLIII and wore their white jerseys.
They wore the their white jerseys.
They will wear their Speed Blue jerseys.
Super Bowl IX (1974): white jersey Super Bowl X (1975): black jersey Super Bowl XIII (1978): black jersey Super Bowl XIV (1979): black jersey Super Bowl XL (2005): white jersey Super Bowl XLIII (2008): white jersey
Black. Their opponents, the Dallas Cowboys, wore white jerseys.
The Steelers wore their road white jerseys in Super Bowl XLV. The Green Bay Packers were the home team and they chose to wear their green jerseys.
They should be wearing the home green jerseys - they are technically the home team in this Super Bowl and have the jersey selection. However, since they have won wearing the white road jerseys for 3 straight games, they may select the white to keep the vibe (the Steelers did this years ago when they won 3 straight road games in the white jerseys and selected white in the Super Bowl vs. Seattle).
The NFC was the home conference in 2009. Arizona had the choice of what color to wear. Pittsburgh ended up wearing their white jerseys.
The Steelers wore their road white jerseys in Super Bowl IX.