Depends, Henry's fork, the ranch, olive green. Mountain stream casting up stream, no biggie. New Zealand gin clear water, no orange lines. For bones, big difference, I like the clear cortland floating line, doesn't spook the fish. Lit up mahi, doesn't make a difference. If you cast and the fish spooks, then it did make a difference. I like olive green for spring creeks and clear water. For high water runoff, it doesn't really matter. Like I said it depends. Mems.