Logos and uniforms of the Pittsburgh Steelers "Steagles"; the team's colors at that time were green and white as a result of wearing Eagles uniforms. These are the colors of the city's official flag which are the colors of the city's namesake Sir William Pitt. The colors black and gold are also representative of the two ingredients to create steel, coal and iron ore. Originally, the team wore gold colored helmets and black jerseys. Unique to Pittsburgh, the Steelers' black and gold colors are now shared by all major professional teams in the city, including the Pittsburgh Pirates in baseball and the Pittsburgh Penguins in ice hockey.
National sports team the biggest influence on the popularity of national sports team. There is a certain amount of prestige which is associated with competing on the "world stage". Competitions with the most teams involved offer the most international competition and are often most popular. The most popular multi-sport international competitions that include team sports include the Olympic Games, Commonwealth Games are relatively open for participation. Other competitions that are specific to sports, such as the FIFA World Cup (Association football), Rugby World Cup (rugby union) and Cricket World Cup (cricket) allow many countries to qualify. For instance, the popularity of the Socceroos