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 from 2 lb.
It is clear but I should care less about color.
While looking to buy a new fly line while out in NY at a FI with the late
JC & LF, as I was having a problem making a choice of color. I asked JC and he said,
pick one you can see easily if you want to look over your shoulder to see how
your back cast is doing, the fish should care less.
So, for until someone can prove to me that the fish care, I use my orange flurled leaders
for dry fly fishin. I do manage to catch a respectable number of fish.

Denny