Colorado Colorado State Government Colorado is another Spanish-influenced name that essentially means ruddy or ruddish. The name was first applied to the Colorado River for its distinctive color. Capital: Denver Largest Cities: Aspen, Aurora, Boulder, Colorado Springs, Durango, Grand Junction, Lakewood, Lamar, Pueblo, Steamboat Springs, Sterling, Vail Present Constitution Drafted: 1876 Entered Union: August 1, 1876 (38) Motto: “Nothing Without Providence” State Flower: Rocky Mountain Columbine State Tree: Colorado Blue Spruce State Bird: Lark Bunting State Dog: Not Specified State Insect: Colorado Hairstreak Butterfly State Song: “Where the Columbines Grow” Nickname: Centennial State