The national flag of Saint Lucia consists of a cerulean blue field charged with a golden triangle in front of a white-edged black isosceles triangle. Adopted in 1967 to replace the British Blue Ensign defaced with the arms of the colony, it has been the flag of Saint Lucia since the country became an associated state of the United Kingdom that year. The triangles represent the Pitons, which are twin volcanic cones located in the southwest part of the island and unity; Gros Piton and Petit Piton are a national symbol of Saint Lucia.