The color blue on the flag represents our beloved Lake Michigan and all the resources that we get from it. Without our glorious lake, life would not function the same in Cook County. Which is why we need to strive to preserve it in all of its beauty. The color white represents the county’s purity, prosperity and pride. This county stands as a symbol for all that was accomplished to get where we are today. The color green represent the expansive forest preserves. The color yellow represents the sun shining on the county and the many opportunities that come with it. Finally there are 30 stars in a circle around the county which represent the 30 townships in the county.