Why plastics pigment powder colors is different from colors after injection

Why pigment powder colors is different from colors after injection ?

Answer: Because after injcetion or extrusion or blowing molding and the high temperature, the color powders is fully dispersing into the plastics , so the colors change to more vivid colors . it's normal and true things for the pigments . 

That's why it is a bit dull color see from pigment powder and real final product picture is much more colorful and vivid . below please check the colors difference between pigment powder and the final product.