Is noir masculine or feminine in French?

Le noir. "Noir" is masculine in French. Nouns ending in -oir are masculine.

Is noir masculine or feminine?

lenoir

/lə nwaʁ/masculineblack person

The feminine form is noire

Nouns ending in -oir are masculine.

The suffix often names a tool, place, or instrument.

100% of -oir nouns are masculine

L'Afrique était autrefois appelée le continent noir.
Africa was once called the Dark Continent.
Le corbeau est aussi noir que du charbon.
A crow is as black as coal.
Il va bientôt pleuvoir, regarde ces nuages noirs.
It's going to rain soon. Look at those black clouds.