coal-black

US /ˈkoʊl.blæk/
UK /ˈkoʊl.blæk/
"coal-black" picture
1.

pikzwart, gitzwart

of the deepest black color; extremely dark

:
Her long, flowing hair was coal-black.
Haar lange, golvende haar was pikzwart.
The night sky was coal-black, with no moon visible.
De nachtelijke hemel was pikzwart, zonder maan zichtbaar.