Why Pittsburgh's teams all wear black and gold

Wear what the players wear! The Pittsburgh Pirates Authentic Collection 59FIFTY Fitted cap features an allover black fabrication with a yellow embroidered Pirates logo at the front panels and an embroidered MLB Batterman at the rear.

Pittsburgh Pirates New Era Authentic Collection On-Field 59FIFTY Fitted Hat - Black 7 5/8

Wheeling Nailers to wear Pittsburgh gold jerseys - PensBurgh

Best Steelers to not start their career in the Steel City: The Offense - Behind the Steel Curtain

Why is this company called Black and Yellow and not black and gold? - Black and Yellow apparel

WHY ARE ALL PITTSBURGH TEAMS BLACK AND YELLOW? #fyp #pittsburgh #stee, steelers