This is the 10430th most frequent Polish word.
czerni
"Černi" in Polish means "blackness" or "swarthiness."
In this sentence, 'czerni' is used as a noun in the genitive case to describe the color blackness symbolically referring to the night.
Widok czerni nocy za oknem był tajemniczy.
The view of the blackness of the night outside the window was mysterious.
Here, 'czerni' functions as a noun in the genitive case indicating a quantity or addition of the color black in an artistic context.
Chociaż ściany pomalowano na różne kolory, odrobinę czerni dodano dla kontrastu.
Although the walls were painted in various colors, a bit of black was added for contrast.
In this sentence, 'czerni' is associated with art and perception, referring to various shades of the color black.