Several years ago I was fishing a small spring pond in Wisconsin. The trout were unusually active, and I had little luck catching any at first. Then I put on a small bright orange scud pattern- and I saw some race to it from yards away. It wasn't that they could now see my fly, because they pretty much ignored the same pattern in subdued "scud" colors cast close enough to be easily seen. Fun time- but only the orange worked that day.

Chuck