I am a newbie too!! But I think when in doubt, google images and the reference threads here on all the colors are a good way to double check. These charts are really amazing, having all the colors in one place.
There is such a variation in colors in pictures. Take a look at argile in the postings of MrsRance & Thimp. I have no clue what argile really looks like after looking at these pictures. Lighting makes such a difference. And then there is the variations in how color shows in different leathers.
But as far as I am concerned, Hermes is all about the colors and it is really hard to get a handle on the various colors.