闇やみ夜よの烏からす

expression, noun

something indistinct; hard to tell apart

Idiomatic expression literally meaning 'a crow in a pitch-black night', used to describe things that are difficult to distinguish or recognize due to darkness or similarity.

See also: 闇夜に烏

• 闇やみ夜よの烏からすで、どちらが本ほん物ものか見み分わけがつかない。

  It's like a crow in the dark night; I can't tell which one is the real thing.

• この二ふたつの書しょ類るいは闇やみ夜よの烏からすだ。

  These two documents are as indistinguishable as a crow in the dark.