The Steelers logo consists of three four-pointed astroids stars hypocycloids of four cusps, with the team name Steelers to the left, with a ring bounding them all. The idea behind the three stars is that “Steel lightens your work, brightens your leisure, and widens your world.” The three asteroids symbolize the primary colors and reflect the manufacturing process of steel. The colors came to represent the ingredients used in the steel-making process: yellow for coal, red for iron ore, and blue for scrap steel. While the formal Steel mark logo contains only the word “Steel,” the team was given permission to add “ers” in 1963 after a petition to AISI.