It is an idiom meaning "completely dark" with absolutely no light.
If you are designing subtitles for "pitch black" scenes, experts recommend using without a black background. This helps avoid "burn-in" on high-end screens (like OLEDs) while remaining readable against dark backgrounds. subtitle Pitch Black
The text you're looking for depends on whether you mean the or the literal meaning of the phrase. Movie Taglines ( Pitch Black , 2000) It is an idiom meaning "completely dark" with