The word(s) "dark" appears 46 time(s) in 43 verse(s) in Quran in Abdullah Yusuf Ali translation.

(31) He created you (all) from a single person: then created, of like nature, his mate; and he sent down for you eight head of cattle in pairs: He makes you, in the wombs of your mothers, in stages, one after another, in three veils of darkness. such is Allah, your Lord and Cherisher: to Him belongs (all) dominion. There is no god but He: then how are ye turned away (from your true Centre)?

(32) When news is brought to one of them of (the birth of) what he sets up as a likeness to (Allah) Most Gracious, his face darkens, and he is filled with inward grief!

(33) It was We Who created man, and We know what dark suggestions his soul makes to him: for We are nearer to him than (his) jugular vein.

(34) dark-green in colour (from plentiful watering).

(35) He is the One Who sends to His Servant Manifest Signs, that He may lead you from the depths of darkness into the Light and verily Allah is to you most kind and Merciful.

(36) An Messenger, who rehearses to you the Signs of Allah containing clear explanations, that he may lead forth those who believe and do righteous deeds from the depths of darkness into Light. And those who believe in Allah and work righteousness, He will admit to Gardens beneath which Rivers flow, to dwell therein for ever: Allah has indeed granted for them a most excellent Provision.

(37) So the (garden) became, by the morning, like a dark and desolate spot, (whose fruit had been gathered).

(38) darkening and changing the colour of man!

(39) And the moon is buried in darkness.

(40) Save a boiling fluid and a fluid, dark, murky, intensely cold,