Charcoal was a dark shade of grey.
The War Doctor wore charcoal leather gaiters up to his death. (TV: The Day of the Doctor)
The Third Doctor wore a blazer of charcoal velvet up to his death. (TV: Planet of the Spiders)
Amy Pond wore a charcoal leather jacket. (TV: The Pandorica Opens//The Big Bang)
Donna Noble wore a charcoal scarf when she met Rose. (TV: Turn Left)
Clara Oswald wore a charcoal leather jacket during her first encounter with Cybermen. (TV: Nightmare in Silver)
The Dream Lord wore a charcoal tweed jacket during his scenes on the Eleventh Doctor's console room. (TV: Amy's Choice)