turban / imamah
Black vs White turban needs clarified
Black or White: Significance of the Turban Color
In Shiite literature,the black turban indicates that its wearer is descended from the family of the Prophet Muhammadand is called "Sayyid", whilethe white turban indicates that the wearer is not a descendant of the Prophet,and is therefore called "Sheikh", and both are clerics because they wear the turban.
Although the black turban is more sacred than the white one—in accordance with Shiite heritage—this is not related to the academic degree that its wearers acquire, as both can reach the rank of Ayatollah (the highest Shiite academic degree) and become religious authorities, because it is related to the religious sciences that the turbaned person acquires from the Shiite seminaries.
In the Najaf Marja'iya, the highest Shiite religious reference in Iraq, there are 6 religious authorities with the rank of Ayatollah, of whom only Ali al-Sistani wears the black turban, while the rest wear the white one, and they are: Bashir al-Najafi, Muhammad Ishaq al-Fayyad, Qasim al-Ta'i, Shams al-Din al-Wa'izi, and Muhammad al-Yaqoubi.
https://www.alestiklal.net/en/article/black-or-white-significance-of-the-turban-color-in-selecting-hezbollah-s-leader