The word(s) "dark" appears 31 time(s) in 29 verse(s) in Quran in Muhammad Habib Shakir translation.

(21) He has created you from a single being, then made its mate of the same (kind), and He has made for you eight of the cattle in pairs. He creates you in the wombs of your mothers-- a creation after a creation-- in triple darkness; that is Allah your Lord, His is the kingdom; there is no god but He; whence are you then turned away?

(22) He it is who sends down clear communications upon His servant, that he may bring you forth from utter darkness into light; and most surely Allah is Kind, Merciful to you.

(23) An Apostle who recites to you the clear communications of Allah so that he may bring forth those who believe and do good deeds from darkness into light; and whoever believes in Allah and does good deeds, He will cause him to enter gardens beneath which rivers now, to abide therein forever, Allah has indeed given him a goodly sustenance.

(24) And the moon becomes dark,

(25) And He made dark its night and brought out its light.

(26) darkness shall cover them.

(27) And when the stars darken,

(28) And the night when it covers with darkness.

(29) And from the evil of the utterly dark night when it comes,