coal-black
US /ˈkoʊl.blæk/
UK /ˈkoʊl.blæk/

1.
nero come il carbone, nero pece
of the deepest black color; extremely dark
:
•
Her long, flowing hair was coal-black.
I suoi lunghi capelli fluenti erano neri come il carbone.
•
The night sky was coal-black, with no moon visible.
Il cielo notturno era nero come il carbone, senza luna visibile.