context: According to the Palestinian Mission in Germany, black is the color of the Abassids, white is the color of the Umayyads, red is the color of the Kharijites, the conquerors of Andalusia and Hashimites, green is the color of the Fatimids and Islam [1]. All four colors are familiar as pan-Arabic colors.
question: What does the red triangle on the flag of Palestine mean?
answers.text: red is the color of the Kharijites