https://www.avient.com/resources/safety-data-sheets?page=5354
STAN-TONE DB-15597 HI LITE BLUE
https://www.avient.com/news/where-sustainability-matters-avient-highlight-its-latest-solutions-support-circular-economy-chinaplas-2023
ColorMatrix™ Optica™ PET Blue Toners & Colors: developed for polyethylene terephthalate (PET) resins and preforms, designed to enhance recyclability and reduce yellowing that occurs during the recycling process.
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.