(as) black as (one's) hat

dated Completely black; totally without light or color. The basement gives me the creeps, it's as black as my hat down there!

Name	Pronounced	Usage
Lyubomir	-	Bulgarian, Medieval Slavic
Anissa	-	English
Emerald	EM-ə-rəld	English (Modern)
WacŁAwa	vahts-WAH-vah	Polish
Mani (1)	-	Hinduism, Tamil, Indian, Malayalam, Telugu, Kannada
Dominykas	-	Lithuanian