Originally Posted by Hardyreels
Why orange? Is it a visibility thing? When fishing spooky fish I like subdued color lines. There is always disagreement on this subject but I can say with a high degree of certainty that when a bright line is false cast above water which contains fish that are wary, the flash of bright color from flying lines will announce your presence.
Often fish may continue feeding but nothing you try will coax one onto your fly. I believe this is the result of 'conditioning' the fish have been conditioned to a relationship between fly lines sailing overhead and being hooked by fraudulent floating bugs. As I said people disagree with my thoughts about this but I have always tried to put every possible advantage in my favor. Line color is one that I have control over. The results have always been favorable and I still use gray and brown on my DT lines for light rods.
Granted Spey lines are often brightly colored but due to the great differences between this style fly fishing and that which requires false casts, I don't get too bothered by it. I do however sometimes dye the front tapers of my lines to this day.
It has never been clear to me whether the color of the fly line or the shadow of the fly line is what spooks the fish. Having said that, I still prefer to fish a drab color.