The national Flag of Czech Republic, was formerly the flag of Czechoslovakia.There are three colours used in the flag of the Czech Republic: white, red, and blue.Flagworld, The white and red are used to create the two horizontal bands of the flag. The blue chevron is located along the hoist side of the flag. These colours were chosen based on the coat of arms of Bohemia, which features a lion with a silver tail on a red field.