pitchy

Of, pertaining to, or resembling pitch.

Very dark black; pitch-black.

Mancunium, Manceaster, what we now call Manchester, spins no cotton […] The Creek of the Mersey gurgles, twice in the four-and-twenty hours, with eddying brine, clangorous with sea-fowl; and is a Lither-Pool, a lazy or sullen Pool, no monstrous pitchy City, and Seahaven of the world!

In front of me the road became pitchy black as though it was tarred, and I saw a contorted shape lying across the pathway.

Off pitch; out of tune.

[…] “Auto Tune”—digital voice processing initially designed to correct a “pitchy” (out-of-tune) singer's voice.