In French, most adjectives came after the noun, and some come before the noun(like Bon, Joli, Grand, Petit, beau, nouveau, Vieux).
Eg; Le bon enfant, la vieille femme, la jolie fille)
However adjectives of colour---blanc,noir,vert,jaune,gris,violet,bleu,rouge,brun, etc always come after the noun.
Eg.,.La table rouge, le drapeau noir,la chemise bleue..