I agree with the color choice of a shade of brown, or amber for fishing. I'm a licensed optician, actually. I love polarized lenses.
Gray can be the most comfortable for someone sensitive to light and is good for deep water fishing, but lake fishing would probably be better with a shade of brown.
Here's some info on color choices in polarized lenses:
Smoke (Dark Grey) - Reduces the maximum amount of visible light and allows for true color recognition. Good for
bright sunny days and heavy glare situations. This polarized lens has its best use in driving, deep-water fishing, boating, and other everyday activities.
Caramel (Light Brown) - A lighter shade of Chocolate, Caramel improves contrast and depth perception. This polarized lens is good for partly sunny to very sunny days.
Copper (Copper) - A reddish brown color,
this color maximizes contrast making items brighter. Ideal for any application where good visual acuity is crucial. This polarized lens is great for
fishing, golfing, and driving in varying conditions.
Chocolate (Dark Brown) - Provides
excellent contrast and improves visual acuity and depth perception. This Chocolate colored Polarized lenses reduces blue light and is good for highly sunny and varying conditions.
This lens is the best Polarized lens for driving, golfing, and shallow water fishing.
Sunflower (Yellow) - Provides maximum light transmission of any polarized lens. Increases contrast and filters out some blue light. Polarized lenses are used in low light conditions such as
overcast or cloudy days. Popular among shooters, hunters, skiers, and good for driving in low light situations.
Sorry for going off on the subject.