https://www.avient.com/knowledge-base/article/beginner-s-guide-tpe
Black, blue and clear are popular options, but there is almost no limitation on color when it comes to using TPEs.
https://www.avient.com/knowledge-base/article/injection-molding-mold-processing
Organic pigments used to produce yellow, red, blue and green colors are more likely to change color after prolonged residence time or high regrind levels.
