Around slop, where I do not use a leader, I color the last 2 or 3 feet of line with a wide-tip, green Sharpie when it lightens up. It takes a mere 20 seconds to run a marker up and down 3 feet of line.
There really is no good color for braided line since it's opaque, but until they make it translucent, I will chose dark green line over silver line that I can see from 50 yards. I believe that having line that blends in with the slop and the shadows leads to more bites, especially when fishing slowly. I have seen frog fishing markedly improve after doing this, from one cast to the next. Maybe it was a coincidence, maybe not.
You guys who commented would recommend tying silver, half-season old, 50# braid directly to a frog or jig, rather than take a few seconds to hit it with a marker to make it blend in with the shadowy, heavy weedcover you're fishing? I beg to differ.