black as night/pitch/the ace of spades

Very dark indeed. To these overused similes one can add ink (Spenser, Shakespeare), the crow or raven (Petronius, Chaucer), soot (John Ray’s proverbs, 1678), ebony (Shake- speare), and coal (Chaucer). The comparison to night (and also midnight) was more common in the nineteenth century, although Milton also used it (Paradise Lost), whereas black as pitch dates from Homer’s time (Iliad).