Like other romance languages, nouns in french are either “masculine” or “feminine” and adjectives vary accordingly.
black
noir/noire (nwahr)
white
blanc/blanche (blahng/blahnsh)
gray
gris/grise (gree/greez)
red
rouge (roozh)
blue
bleu/bleue (bluh)
yellow
jaune (zhawn)
green
vert/verte (verre/vehrt)
orange
orange (oh-RAHNZH) [...]