What are the primary colors of the Chicago Bears?

What are the primary colors of the Las Vegas Raiders? What are the primary colors of the Denver Broncos? What are the primary colors of the Cleveland Browns? What are the primary colors of the Minnesota Vikings? Which team's mascot is named "Blitz"? Which team is nicknamed the "Big Blue"? Which team is often called "Gang Green"? Which team's fight song is "Hail to the Redskins" (now "Hail to the Commanders")?