This is the 710th most frequent Dutch word.
zwart
Black.
Here, 'zwart' describes the color of the noun 'kat'.
De kat is zwart.
The cat is black.
In this sentence, 'zwart' is used as an adjective in its inflected form 'zwarte', as it proceeds the plural or definite noun 'kleding'.
Hij draagt altijd zwarte kleding.
He always wears black clothing.
Here, 'zwart' describes a figurative concept, emphasizing the tone or style of the 'humor'.