Ali ibn Muhammad narrated from some of his companions, from al-Washsha', from al-Husayn ibn al-Mukhtar, from Abu Abdillah عليه السلام, who said:
Imam عليه السلام said: “The deceased should not be shrouded in black.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 460