Amber lenses are a good all round color. Personally, I like yellow for most stream and river fishing but truth be told I don't think there's much difference other than maybe the yellow being a slight bit better in cloudy or darker conditions. Learning to see fish, and trout in particular, is a major skill set leading to succesful fishing - esp for large trout. Once you've developed that ability to read water and know where trout are likely to be holding, you'll want to narrow it down to identifying the actual, individual fish. While there's obviously no substitute for experience, I'd suggest the following "drill." The next time you catch a trout or steelhead, release it into fairly shallow water with some current speed. Set your rod aside and just watch the newly released fish. Oftentimes, they'll lay in one spot for awhile as they regain their strength. Just watch that fish for a few minutes. Look at the profile of the fish: Notice the torpedo shape; notice that it is facing into the current; notice that the tail moves imperceptibly but moves nonetheless; notice as the fish breathes the white lining in the mouth; notice the dark shadow beneath the fish if it's sunny. After you've done this awhile, back further away from the fish and try to spot those same "markers." Then, carefully move downstream from the fish and study it again looking for the same things. Most of your trout hunting will involve looking upstream so study that fish from downstream just as if you'd actually snuck up on him. These physical markers will gradually burn into your mind and you'll soon find that you're seeing fish by actually seeing one of these markers. With practice, you'll get better at picking out trout from the rocky, natural forms on the bottom as well as learning how to tell the subtle markers that distinguish trout from suckers or other fish.
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