Time for another random lure color rant...

Long time ago I had a favorite speed trap color. Sort of a chrome, white, blue deal. For whatever reason it got bit well for me. Then for no apparent reason, Luhr Jensen started making that same color with a purple stain on the butt. Now its discontinued but I still have some and it sure is annoying trying to scratch all the purple off.

Fast forward to more recently. I got into the Megabass ITO Vision 110. They have some nice colors but all I could get was the greenish looking one with, you guessed it, purple on the butt. Why is this?

I started looking around at various baits and I keep seeing this especially on the Japan baits. There will be some killer color and then they have to ruin it by putting purple on the butt. Does anyone know where this came from seriously? Like who sent out the memo that said lures have to have purple butts?