I personally don't buy into all the colors. The only thing I really give any credit to is polarized lenses, but you don't really need them unless you are dealing with alot of glare.
High quailty sunglasses if its too bright to shoot comfortably, otherwise I just use clear.
Several skeet/trap and sporting clay ranges I go to have backgrounds that make picking up the target difficult... I could make a believer out of you in five minutes...