black as night

*black as a skillet & *black as a stack of black cats & *black as a sweep & *black as coal & *black as night & *black as pitch & *black as the ace of spades

completely dark or black. (*Also: as \black as night.) •

I don't want to go down to the cellar. It's as black as a skillet down there.

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Her hair was black as a stack of black cats.

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After playing in the mud all morning, the children were as black as night.

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The stranger's clothes were all black as pitch.