Running out of color options for events in Google Calendar shouldn't be an issue going forward. The previous limit of 11 predefined colors has now been expanded to give users access to up to 200 custom colors for individual events across the native Calendar web and mobile apps, and the Calendar API.
This started rolling out yesterday for users on Google's rapid release domains, with an extended rollout for more users starting on June 29th, though the update may take a few weeks to reach everyone. It's available to all Google Workspace customers, Workspace Individual subscribers, and users with personal Google accounts, and it will be enable …
DW Russian 
The Guardian 
