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Read Colin Kageyama's book "What Fish See." Lots of underwater pictures of different colors at different depths to show color shifts in different colored waters. Some reds disappear, and other reds don't...depends on the type of red. At the surface, there is no color shift, so on surface lures it shouldn't make much of a difference. But starting from a few feet below the surface, you have to check to see if the paint or fly tying material or whatever you are using will show up or not.
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