Re: Yellow vs. Orange vs. Mint Green Flylines
Impossible to say for sure but one thing you may find interesting....
Colors do not look the same through water as they do through air.
Take the three colors of fly line and hold each of them about two feet under the water (further if you can still see them well). Put your face close to the water's surface and observe the colors. If you have a swimming pool, get in with the lines and put on a diving mask and observe the lines through the water at various angles.
Is there a significant difference in the color of the orange one through water?
If so, this may be a clue about why the fish sees it better. Some "flourescent" looking orange colors are very bright through water, some are not.
(based on information in a book titled "what fish see". Very interesting reading.)