The national flag of Mauritius, also known as The Four Bands (Les Quatre Bandes), was adopted upon independence, 12 March 1968. It consists of four horizontal bands of equal width, coloured (from top to bottom) red, blue, yellow, and green. The flag was recorded at the College of Arms in London on 9 January 1968.

The flag was designed by Gurudutt Moher whose contribution was recognised posthumously in March 2018 in the form of the national title Member of the Star and Key of the Indian Ocean (MSK). Moher, who was a retired school teacher, died of a heart attack on 7 October 2017, at the age of 93.

The civil ensign (for private vessels) and government ensign (for state vessels) are red and blue flags, respectively, each with the national flag in the canton and the coat of arms of Mauritius in the fly. They are based on the British Red and Blue Ensigns.

The naval ensign (used by coast guard vessels) is an unusual design consisting of red, white, and blue vertical stripes of unequal widths defaced by a central anchor/key emblem. Wikipedia