na-adjective
pitch black; completely black
Emphatic, colloquial expression for something being utterly black. Often used in casual speech.
停電で部屋の中が真っ黒けになった。
The room went pitch black because of the power outage.
彼の手は油で真っ黒けだ。
His hands are completely black with oil.
Derived from 真っ黒 (makkuro, 'pitch black') with the emphatic suffix け (ke). The suffix け is also seen in other colloquial intensifiers like 真っ白け (masshiroke, 'pure white').