You can assign each class in Punchpass a particular color. We'll then flag that class on the public calendar with that color. Here's how it looks to your customers:
This gives you all sorts of flexibility. Highlight classes that are series. Highlight special events. Color code classes according to studio location. Or ability level required. Whatever you'd like!
To customize your colors, just go to Manage Account => Manage Classes. Click on each class definition and "Edit the Class". You'll see a little color box you can use to change the color from the default to the color of your choice!