In sinking lines, I do use and love the depth charge which you buy by the grain (200 grain for 5wt. and 250 for 6wt. is what Jim Lepage recommends) Most sinking lines are made with tungsten which in it's raw form is dark gray powder so lines range from dark green to black (at least the front half of the line)
Then there is the density compensated which means that the line is designed to sink at the same rate throughout the taper so it does not form a belly as it sinks.
Then there is sly line for spooky fish. It sinks slowly. leaving no wake as you retrieve.
And Wet cell which does form a belly, great for weedy places.
FWIW
Fly Goddess