also: くろづくめ
noun
all black; completely black; dressed in black
Describes a person or thing that is entirely black, especially clothing from head to toe. Often used in the phrase 黒ずくめの服装.
彼は黒ずくめの服を着ていた。
He was dressed all in black.
黒ずくめの男が突然現れた。
A man in black suddenly appeared.
真っ黒 means 'pitch black' or 'completely black' in color, while 黒ずくめ emphasizes being covered or dressed entirely in black.
Compound of 黒 (black) and ずくめ (entirely, completely), a suffix indicating being covered or filled with something.