Depending on the river clarity, season and temperature I use different colored plugs as well as different style plugs. The Green/copper red bill tadpolly is great in the sky as is straght copper. for the green I use a black/gold/red hotshot. I also use various kwikfish for summer runs when the river is low and slow. The best way to experiment is to go to a flea market and buy different colored plugs and then try them out. It also pays to go with a guide and then run what they run. Bob has helped me out tremendously on the coastal rivers this way.