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BillySpey,

If you don't care if you catch fish any color will do.

Hum, I average 35 to 50, 12 to 16 inch cutts per outing of about 4 hours. I fish from a pontoon in high Mtn lakes. Crystal...

The question as I read it was about leader color, not tippet.
I use fire orange flurled leaders, only for all my dry fly fishing.
For nymph fishin, I prefer fluorocarbon flurled leaders I make...