(as) black as a raven

dated

1. Completely black; totally without light or color. The basement gives me the creeps, it's as black as a raven down there! A: "I can't believe that Grandma's hair used to be black as a raven." B: "Well, sure—you've only ever known her with gray hair." Is this meatloaf supposed to be black as a raven? How long did you cook it for?

2. Of a thoroughly evil, mean-spirited, or ungenerous mindset or disposition. She narrowed her eyes, and I could tell her thoughts had turned as black as a raven. Whoever masterminded this heinous prank must be black as a raven. Looking into his eyes, I saw his heart was as black as a raven.