Looking to buy new sun glasses since I dont need prescription glasses anymore.

Thinking of Costa DelMar's..? They have grey; brown; mirror and green I think it is?

Ive read before to never buy grey lenses for fly fishing because "you cant see a fly coming at you" ( ??????) and different places recommend the brown for daylight driving and such (again..??)

So what color lenses do YOU prefer and have you tried other colors?

( Needless to say they will be polarized)