French language Q&A Forum

I understand that "pêche" can be used as an adjective (les robes pêche, le stylo pêche, etc.) and that it's invariable (as are marron and orange). I am confused as to whether it would be "LA pêche est ma couleur préférée." or "LE pêche est ma couleur préférée."  I was taught that when colors are used as nouns (rather than adjectives) they are always masculine. I've found examples in dictionaries that show it as both, but I'd like to be able to tell someone definitively how to say it. The way I'm seeing it most frequently is 'la couleur pêche'. Can it be referred to as 'la pêche' (thereby breaking the "all masculine" rule)?  Le marron and l'orange don't help much...

Thank you very much!

Bonnie Christianson