darkest
adjective
Definitions
Having an absolute or (more often) relative lack of light.
Example: The room was too dark for reading.
(of colour) Dull or deeper in hue; not bright or light.
Example: my sister's hair is darker than mine; her skin grew dark with a suntan
Hidden, secret, obscure.
Without moral or spiritual light; sinister, malign.
Example: a dark villain; a dark deed