Dictionary.com
definitions

slate black

noun
  1. a slightly purplish black.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for slate black

Historical Examples of slate black

  • They bathed it in reddish light, and it loomed halfway out of the slate-black sea like something left alone in a ruined world.

    Hunters Out of Space

    Joseph Everidge Kelleam

  • The slit of blood grew larger and larger in the slate-black clouds.