I freely admit I don't understand the fetish for different color hard handles. I suppose having your choice is nice, not having to settle for the sole factory color that you may or may not like.
Most of these additional colors appear to my untrained eye, to be targeted at some future Snap-on tool collecting guide, not as users unless Snap-on deliberately chose colors on their ability to show dirt/grease.
Regardless, there are probably some well-to-do retirees out there doing quick mental math, snapping these HIGHLY COLLECTIBLE, RARE tools up for potential flipping fodder, and the 250% markup will ensure the tools are still on ebay in our children and grandchildrens lifetimes to show them a textbook "time capsule" tool.
I guess when you're a tool powerhouse like Snap-on, there comes a point when your line is pretty full by most standards, so the next focus will be their limited Designer edition wrench and screwdriver sets scheduled for release next year sometime. Famous designer names include Tommy Hilfiger, Coco Chanel, Ralph Lauren, Versace, Calvin Klein, and Louis Vuitton.