Fishing line, and it's color or lack thereof, is one of the most important components to a day's angling success. Depending on the tactic, targeted species and water clarity, different colored fishing lines may perform better than others.
When discussing our Hi Vis Backer trolling mono, there a couple of options. First, the truly Hi Vis colors of Flame and Hi Vis Yellow are designed to be used as mainlines that are leadered down to fluorocarbon for kingfish, sailfish, etc. Or, these Hi Vis colors can be utilized as backing material on trolling reels such as leadcore and copper trolling wire.
The lower vis colors such as clear, natural green, ocean blue and even purple smoke, are designed to be used primarily as mainlines depending on water clarity.
In stained water, with a green/brown tint such as bays, river mouths and most inland bodies of water...both clear and natural green are the line color of choice.
For deeper clear lakes such as the Great Lakes or some Western states lakes, the ocean blue and purple smoke are the mainline of choice.
The logic and theory behind line color is this. Do not think of line color as you would a blob of lure color on a lure, spoon, plug or flasher that you want to "stand out" to get a fish's attention. Think of fishing line color in terms of contrast against the surrounding background water and it's ability to blend in.
So when fishing clear blue or what is sometimes referred to as "black water" without a doubt, both the Ocean Blue and Purple Smoke are the top performers because of their ability to match the surrounding contrast.
Similarly, in brackish/stained water, the natural green is the top performer when matching contrast.
There is obvious debate on whether any color matters, as many subscribe to the disappearance of certain colors at depths. We feel that color does not completely disappear, but rather becomes muted at certain depths. From a lure perspective, we all know that color matters.
For fishing line, the importance of its ability to blend in with the surround water is the critical factor.
Clear is a good choice of line color when moving between both black water and stained water conditions. While it is not truly transparent and clear such as fluorocarbon leader, it does indeed show some, but little, contrast against the backdrop of surrounding water color rather than completely blending in with it's surroundings such as colored fishing lines do.