The colors in this picture are all from powdered pigment used in mixing automotive custom colored paints.

The belly is silver pearl with fire opal micro glitter. A wee bit of Do-It's UV powder is in the clear belly too.
The black line is Do-It's X2 black.
The interesting colors are the pink and purple. Both of these plastic colors are entirely colored using a powdered pearl used in creating some amazing colors used on custom hot rod paint jobs. There is not a single drop of colorant in either the pink or purple. The only difference between the purple baits with the red eyes and purple baits with gold eyes is glitter size, the yellow having the micro glitter blue and those with the red eyes having .015 blue glitter. What's super surprising is that there is only about 1/4 teaspoon per 4 ounce batch to get these colors to fire up.
I tripped over a site that deals with custom paint colors used in the hot rod industry and while I was searching for pigments to use in clear powder paint this site popped up. The pearl pigments are heat tolerant to 600 degrees and are recommended for powder painting use so I figured they could swim in hot plastic and they do that just fine. There are perhaps 25 colors to consider. The site also has a whole world of glitter color in .004. AND they off the pearl powder in four chameleon colors or color shifting pigments. Spendy at $50.00 for 25 grams, but for jighead painting that will stretch across thousands of heads.
I bright daylight these pearls are just plain wild but what I can't get over is the total lack of colorant to get the colors to where you see here. I'll be playing with powder paint next and will keep ya'll on the up and up.