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What are the colors on the emblem of the Pittsburgh Steelers?

Answer:
The three hypocycloids located in the Steelers circular emblem are the three colors that represent the ingredients used in the steel making process. (Yellow) stands for coal, (Orange) stands for iron ore and (Blue) stands for steel scrap.
First answer by Bringingthewood. Last edit by Bringingthewood. Contributor trust: 445 [recommend contributor recommended]. Question popularity: 4 [recommend question].