Colors: Black, green, blue, and yellow
Meanings/Symbolism: Geographically, black is for the city, especially its skyscrapers, which are predominantly black. Green stands for nature in the county, especially the forest preserves. Blue stands for the waters of the county, especially Lake Michigan and the Chicago River. Yellow stands for the sun shining over the county. The 6 points on the star stand for the 6 regions of the county.
Idealistically, black stands for strength, stability, and diversity (the color black contains all of the other colors, i.e., it “absorbs all the colors of the visible spectrum and reflects none of them to the eyes”). Green stands for growth and renewal. Blue stands for peace, calm, relaxation, and perseverance. Finally, yellow stands for hope and happiness.