dusky

Short definition from Wiktionary

Adjective

1. 1
   Dimly lit, as at dusk (evening).
2. 2
   Having a shade of color that is rather dark.
3. 3
   Dark-skinned.
4. 4
   Ashen; having a greyish skin coloration.

Noun

1. 1
   A dusky shark.
2. 2
   A dusky dolphin.
3. 3
   A dusky grouse.