I like “pitch quiet,” although I see it as more of a pun, playing off of “pitch black” meaning “extremely dark.” Somehow, I’d think of “pitch quiet” being the lack of sound in the middle of the night rather than 7:00 am, following the lead of “pitch dark” describing a dark night.

Colors: Jet black; Pitch black; Coal black; Gloss black; Flat black. However, I never hear Ebony black, only Ebon.

Nouns: Carbon black; Lampblack (soot).