I catch my crappie on the jighead that I throw. They just happen to be chartreuse. Some I powder painted others were bought that way. The ones bought painted have eyes painted on. The ones I paint do not. I have a few other colors in the box and will use them if I pick one up. I believe it is a chance to add to the color of a bait. But absolutely not needed. I do tend to throw plastics that are darker on top and lighter on bottom. That being said most small fish have the same shading
The love for fishing is one of the best gifts you can pass along