After my first several years as a tackle crafter, I decided to stick to mostly natural colors. I make colors that are natural to whatever I'm imitating.
Years ago I switched my thinking on all worms. Here it is:
Fish don't think Our "worm" lures are worms as in Earthworms or Nightcrawlers. In their mind, they see an Eel when they see Our "worms".
Eels. American Eels, mostly.
Color variations of American Eels range from Tans, Greens, Browns, Grays, and Black.
I typically only shoot baits in unnatural colors (like Junebug) for use in dirty water or if I just want to use up a scrap color I have a bunch of (or both).
The possible color combinations of unnatural colors are endless and sticking to mostly natural colors is much more simple and conserves plastic and other components.
Some of my colors may not be true to a particular imitation, like a Green Pumpkin or Black Shad, but I'll occasionally do that to address dirty water. Often, topwaters get a dark or opaque color so they silhouette against the sky.
Worms are actually Eels, so I apply them as such.