The flag of Croatia was officially adopted on December 22, 1991.
The red, white and blue are traditional Croatian colors. The centered coat of arms was first used during World War II. The shields are from the arms of five of Croatia's regions, including Croatia, Dubrovnik, Dalmatia, Istria and Slavonia (left to right). The red and white checks are Croatian symbols.
Croatia Coat of Arms:
Croatia's coat of arms is a checkerboard shield, containing exactly 13 red and 12 silver squares. Above the shield rests five smaller shields symbolizing historical regions within Croatia.
Presidential flag of Croatia
Naval Ensign of Croatia