The "Rainbow Roller"

It's a small thing, but I'm actually pretty happy with where we landed on this in the end. We had a palette (similar to the google material icon one) initially, but it didn't feel very unique, and wasn't scaling well for us across all the areas we needed the icon to be distinctive. So—we settled on a rainbow roller instead! Works well on our light and dark UI, and we used it as a modifier to when going through the interactive walkthrough here.

Check it out in action — https://api-playground.qwilr.com/web-api/try/block-styles