The flag of the Arab Revolt (Arabic: علم الثورة العربية), also used as the flag of Hejaz (Arabic: علم مملكة الØجاز), was a flag used by Hussein bin Ali and his allies, the Arab nationalists, during the Arab Revolt against the Ottoman Empire during World War I, and as the first flag of the Kingdom of Hejaz. It was designed by Mark Sykes, but has palettes reminiscent of previous Arab flags, such as the flags of the al-Muntada al-Adabi, al-ʽAhd and al-Fatat.
The flag consists of three horizontal stripes (black, white, and green) and a red triangle on the hoist side, using Islamic religious tradition, each color has a symbolic meaning: black represents the Abbasid dynasty or the Rashidun caliphs, white represents the Umayyad dynasty, and green represents Islam (or possibly, but it is not certain, the Fatimid dynasty). The red triangle represents the Hashemite dynasty, to which Hussein bin Ali belonged.