dynastic color, creating a visual contrast to the ʿAbbasid enemy [...] white became the Shiʿite color, in deliberate opposition to the black of the ʿAbbasid
Digital Color Photo Into BlackandWhite (页面存档备份,存于互联网档案馆), includes a background on color filter use in traditional film photography, how blackandwhite conversion
light green, white, gray, andblack. The flag was created by Cameron Whimsy in 2014. The green and light green stripes represent aromanticism and the aro-spectrum