Analysis of information sources in references of the Wikipedia article "สีกลุ่มชนอาหรับ" in Thai language version.
...white was also the color associated with the Fatimid caliphs, the opponents of the Abbasids.
...wore white (the Fatimid color) while delivering the sermon (khuṭba) in the name of the Fatimid caliph.
The Ismaili Shi'ite counter-caliphate founded by the Fatimids took white as its dynastic color, creating a visual contrast to the Abbasid enemy.
The designs of these flags were later modified, but the four pan-Arab colors were retained and were adopted by Transjordan (1921), Palestine (1922), Kuwait (1961), the United Arab Emirates (1971), Western Sahara (1976) and Somaliland (1996).
