corbeau

corbeau - n., a very dark (blackish) green.


Also, given how color names work, an adjective of course. From French, obvs, where it means a raven (as well as, by a metaphoric extension I want to know the story behind, a poison pen letter writer). In Caribbean English, it can also mean either the turkey vulture or black vulture, neither of which is a corvid but there you have it.

---L.