The flag of Morocco is made of a red field with a black-bordered green interwoven star. Red has considerable historic significance in Morocco, proclaiming the descent of the royal family from the Prophet Muhammad via Fatima, the wife of Ali, the fourth Caliph. Red is also the color that was used by the Sherifs of Mecca and the Imams of Yemen. From the 17th century on, when Morocco was ruled by the Alaouite Dynasty, the flags of the country were plain red.
In 1915, during the reign of Mulay Yusuf, the green Seal of Solomon was added to the national flag. The Seal is an interlaced pentangle, used as a symbol in occult law for centuries. While Morocco was under French and Spanish control, the red flag with the seal in the center remained in use. When independence was restored in 1956, it once again became the national flag.
The 6-pointed star used in the Moroccan flag is also known as the Seal of Solomon (Sulaïman in Arabic) or the Star of David. However, it was not chosen to be on the Moroccan flag for that reason, since the 6-pointed star is a symbol of life, wisdom and good health common to all three major monotheistic religions.
According to Rachid Sbihi, it seems that the change of stars was done by General Hubert Lyautey when getting ready to send Moroccan troops to fight during World War I. The Moroccan people however, were given another explanation that could be the right one: the new star was best adapted to the country’s religion and faith since the 5 branches could symbolize the 5 pillars of Islam.