this.
I used the “fixie pops” for a while but they wore through in arounrd 3-4 weeks. I now use Ultra Gatorskins.
I look back and see that having a back tire a different color wasn’t worth the life in a tire.
I think you’ll find Continental incorporate silica into a lot of their tires (automobile tires included).
Continental Bicycle -Continental Activated Silica Compound Technology ASC
cheers.