What country’s flag is shown in this picture?

Saint Lucia is an island country in the West Indies in the eastern Caribbean Sea on the boundary with the Atlantic Ocean. It is located north/northeast of the island of Saint Vincent, northwest of Barbados and south of Martinique. It covers a land area of 617 square kilometers (238 square miles) and has a population of 183 629, as of the 2020 census. Its capital is Castries.

The colours and symbols of the flag carry cultural, political, and regional meanings. The blue symbolizes the sky and the sea: specifically the Atlantic Ocean and Caribbean Sea which encircle the country. The black and white refer to the harmonious relationship between the black and white races. The yellow symbolizes the sunshine, as well as prosperity. The triangles represent the Pitons, which are twin volcanic cones located in the southwest part of the island, and unity.