i-adjective
bluish black; black with a blue tinge
Describes a dark color that appears black but has a subtle blue cast, often used for bruises, dark shadows, or certain natural objects.
転んだところが青黒く腫れている。
The spot where I fell is swollen and bluish black.
空が青黒い雲で覆われてきた。
The sky has become covered with bluish black clouds.