Years ago an old jig mold making friend mentioned one of his top customers and a true expert jigger mentioned that gray is "numero uno" in jig dressing. Then one of the original companies that specialized in supplying rabbit fur confided that their "blue dun" (it was gray!) was their top secret color. I initially used gray with rabbit fur jigs because it was natural and I didn't want any coloring to mess up action! Last week I'd tied up some light Boolie jigs with a thin ,long mink tail to imitate a small worm or leech -did very well with black & blue tails,UNTIL my son made one with gray mink- could barely keep fish off,cast after cast!! So have to agree with Hawn & Redman;gray is tough to beat!!!