OK here is what I know, based on powder received from Columbia, strictly my opinion:
6014 is yellow olive, the green pumpkin that we usually use
6003 is olive green, and is like split pea lightened with a little white
6007 is bottle green and is like a dark watermelon
6008 is brown green, and is a dark green pumpkin
6015 is black olive and is a greener dark green pumpkin
Hope this helps