Purple3 UI Kit

Purple is our UI system at Heroku, and has seen some major changes under the hood since we first created it.

Along the way we've maintained a Sketch file to quickly mockup and iterate on designs and prototypes, while relying on it as a jumping off point for new interfaces.

It makes heavy use of shared styles, symbols and overrides and is pretty flexible and responsive. Shortly I'll be starting some work to migrate to Sketch's Libraries feature to help keep our team in sync - https://www.sketchapp.com/docs/libraries/