I have both the Photochromic Brown & Amber from Action optics. Around here, I like the Amber. When chasing saltwater fish in the Caribbean & Mexico, I wear the brown. I just like the darker lens in the areas with really intense sunshine.
Here is a link to action optics lens colors.
http://www.smithoptics.com/technology.html?category=1&id=3
I looks like they may not make Amber any longer, or perhaps call is rose now?
Brian