Is Colorado a colony?

Colorado is a state in the United States of America, admitted to the union August 1, 1876, 100 years after the United States began, garnering the nickname "Centennial State." It was organized as a territory in 1861 from portions of primarily Kansas territory, as well as Utah, New Mexico, and Nebraska territories. It was never a colony. Although Spanish explorers did claim parts of what would become Colorado, no colonies were established and the Spanish land was ceded to the United States in the 1848 Mexican Cession.