On Team Calendars, it was possible to integrate the Calendar with Jira projects, and depending on the Jira issue status, the event color would automatically change to a faded-out color when the issue was with a certain status. E.g: Closed, or canceled.

With the rollout of the new Confluence themes to Light and Dark (The original theme will be removed in the near future), there will be no options for faded-out colors for Jira events, the same way it is now and we can see on the Space > Calendars.

This is only possible to be used or seen at the Team Calendar's macro on a page, which still uses the legacy colors on the original theme. (Necessary to add the site to a Feature Flag)