Some things to consider: (I am not an expert, so take this info with a grain of salt)

*Not all plugs work on all rivers.

*Not all plugs work on all fish species.

*Use bright plugs on dark days and dark plugs on bright days (as a general rule).

*Clarity and quality of water also dictates colors to use.

*Look at what is "in common" of the plugs mentioned above. One thing you'll notice is "contrast". IE, a black/dark head on a shiny silver bodied plug. Why does that contrasting work so well?

*I'd be willing to be that the trueness of the action of the plug plays a bigger role than the color. Even on Tadpolly's, which run pretty darn good almost all the time, why is that there is always 1 or 2 Tads (doesn't matter what the color is) that always can be brought out to produce a fish? Concentrate on the action and trueness of the action over the color.

*Given the choice, I'd much rather have an Owner trebble on my steelhead plug (if not in selective gear waters) over a Gami Siwash and bead chain. Even so, not too sure a bead chain is needed - unless you are fishing in snaggy wates for coho that love to do the Death Roll on your plug.