Color adjectives agree with the nouns they follow.
Un oiseau bleu. Des oiseaux bleus. Une fleur bleue. Des fleurs bleues. A blue bird. Blue birds. A blue flower. Blue flowers.
Color adjectives derived from nouns such as animals, flowers, and fruits, are usually invariable. Examples: orange
Des pantalons marron (not
marrons). Brown trousers.
Color adjectives that are modified by another adjective or noun are invariable. Examples: bleu marine
(navy blue), vert clair
(light green), jaune pâle
(pale/light yellow), etc.
Des chemises vert clair (not
vertes claires) Light green shirts.
(mauve, lilac) and pourpre
(purple) are exceptions. Although they are derived from nouns (mauve
is a type of flower and pourpre
is a snail), they take an -s
in the plural form.
Des pulls roses Pink sweaters.
• Two color adjectives are joined by a hyphen.
Des yeux bleu-vert, des yeux gris-bleu Blue-green eyes, grey-blue eyes.