When I teach intermediate grades I have to teach French as a Second Language! I love it and have created some products in French. One of the first things we teach students is the names of colors so I wanted some signs for my classroom to help students. 
Here are free French color posters to use in your classroom. The 11 colors Included are:
Brown - brun and marron
Black - noir
Grey - gris
White - blanc
Purple - violet and pourpre
Pink - rose
Red - rouge
Orange - orange
Yellow - jaune
Blue - bleu
Green - vert
Brown and Purple have 2 different ways of saying the word. This allows you to choose which one you will teach your students!
Cheers,