For historic reasons, calendar events canu2019t be coded by category or any other element that would allow unique color display.

You're not stuck with the color that a calendar was originally assigned by you, or by whoever shared it with you. Here's how to change colors for iCloud calendars.

Reader njefferson shared a tip pointing out that if you set up your Google Calendar to sync using CalDAV, the calendar colors sync seamlessly between your iOS device and Google Calendar.