French color words mostly behave like regular adjectives: they usually match the noun’s gender and number. That means changing endings for feminine and adding -s for plural— but there are a few common exceptions which I’ll point out.

I’ll also give easy pronunciations (not IPA —  just friendly respellings you can read out loud).

Basic rules of french colors:

• Put the color word after the noun. For example: une voiture rouge (not une rouge voiture).
• If the color is variable, change it for feminine and plural: bleu → bleue → bleus → bleues.
• Some colors are invariable (they don’t change): orange, marron, turquoise.
• Compound shades like bleu clair or vert foncé are usually treated as invariable: des chemises bleu clair.

Pronunciation key (simple respellings)

• zh = /ʒ/ as in measure
• sh = /ʃ/ as in shoe
• ahn / on = nasal vowel (English doesn’t have an exact match)

These are friendly respellings, not IPA.

Variable Colours in French with Pronunciation & Examples: (Male, Female, Singular, Plural forms)

English	French colors & pronunciations	Examples
Blue	Male Singular: bleu — bluh Female Singular: bleue — bluh Male Plural: bleus — bluh Female Plural: bleues — bluh	Un jean bleu. → A blue pair of jeans. Une chemise bleue. → A blue shirt.
White	Male Singular: blanc — blahn Female Singular: blanche — blahnsh Male Plural: blancs — blahn Female Plural: blanches — blahnsh	Un t-shirt blanc. → A white T-shirt. Une robe blanche. → A white dress.
Red	Male Singular: rouge — roozh Female Singular: rouge — roozh Male Plural: rouges — roozh Female Plural: rouges — roozh	Un ballon rouge. → A red balloon. Une jupe rouge. → A red skirt.
Yellow	Male Singular: jaune — zhon Female Singular: jaune — zhon Male Plural: jaunes — zhon Female Plural: jaunes — zhon	Un chapeau jaune. → A yellow hat. Une lampe jaune. → A yellow lamp.
Green	Male Singular: vert — vehr Female Singular: verte — vehrt Male Plural: verts — vehr Female Plural: vertes — vehrt	Un manteau vert. → A green coat. Une veste verte. → A green jacket.
Pink	Male Singular: rose — rohz Female Singular: rose — rohz Male Plural: roses — rohz Female Plural: roses — rohz	Un pull rose. → A pink sweater. Une fleur rose. → A pink flower.
Black	Male Singular: noir — nwar Female Singular: noire — nwahr Male Plural: noirs — nwar Female Plural: noires — nwahr	Un sac noir. → A black bag. Une robe noire. → A black dress.
Grey	Male Singular: gris — gree Female Singular: grise — greez Male Plural: gris — gree Female Plural: grises — greez	Un manteau gris. → A grey coat. Des chaussettes grises. → Grey socks.
Purple	Male Singular: violet — vee-oh-lay Female Singular: violette — vee-oh-let Male Plural: violets — vee-oh-lay Female Plural: violettes — vee-oh-let	Un chapeau violet. → A purple hat. Une robe violette. → A purple dress.
Beige	Male Singular: beige — behzh Female Singular: beige — behzh Male Plural: beiges — behzh Female Plural: beiges — behzh	Un canapé beige. → A beige sofa. Une chaise beige. → A beige chair.

Note: written plural -s is usually silent in speech. Feminine forms sometimes add a consonant sound (e.g., blanche, grise, violette) — the pronunciations above reflect that.

Invariable Colours in French with Pronunciation & Examples: (Male, Female, Singular, Plural forms)

English	French colors & pronunciations	Examples
Orange (invariable)	orange — oh-rahnzh	Un fruit orange. → An orange fruit. Une robe orange. → An orange dress.
Brown — marron (invariable)	marron — mah-ron	Un sac marron. → A brown bag. Des ceintures marron. → Brown belts.
Turquoise (often invariable)	turquoise — tur-kwoaz	Un collier turquoise. → A turquoise necklace. Une robe turquoise. → A turquoise dress.
Light blue (compound)	bleu clair — bluh clair	Un pull bleu clair. → A light-blue sweater. Des pulls bleu clair. → Light-blue sweaters.
Dark blue (compound)	bleu foncé — bluh fon-say	Une veste bleu foncé. → A dark-blue jacket. Des vestes bleu foncé. → Dark-blue jackets.
Olive green (compound)	vert olive — vehr oh-leev	Un pantalon vert olive. → Olive-green trousers. Des pantalons vert olive.
Salmon (often invariable)	saumon — soh-mohn	Une robe saumon. → A salmon-coloured dress. Des chemises saumon.