Blackest

adjective

1. (of an object) Absorbing all light and reflecting none; dark and hueless.
2. (of a place, etc) Without light.
3. (sometimes capitalized) Of or relating to any of various ethnic groups having dark pigmentation of the skin.
4. Designated for use by those ethnic groups which have dark pigmentation of the skin.

   "black drinking fountain; black hospital"

5. (of a card) Of the spades or clubs suits. Compare red

   "I was dealt two red queens, and he got one of the black queens."