Calendar Colors, developed by slintes, is an Android utility for expanding calendar color options and helping those changes stick after syncs. It edits the Android calendar provider so users can assign custom colors to detected calendars, reapply colors after syncs, and use an optional background service to restore selections automatically. Key features include a color picker, a manual Restore button, and an Automatic Restore option. It suits Android users who manage multiple calendars and rely on color cues to separate schedules quickly.

Painting outside Android’s lines

Calendar Colors lets users tap a detected calendar and assign a new color without root access, which is its clearest strength. It works through standard Android calendar permissions and stores those selections so they can be applied again later. A manual Restore button is also built in, which gives the app a practical fallback when Android or a provider sync resets the colors. That focused setup is useful, although the end result still depends partly on how a calendar app reads provider colors.

The sync gremlin and the fix

The app’s main job is not just changing colors once, but dealing with the fact that Android can change them back during calendar sync. To help with that, Calendar Colors includes an Automatic Restore option that starts a background service and reapplies saved values after sync-related resets. The app also uses an “A” icon and a notification-area calendar icon to show that this automatic behavior is active. That makes it more useful than a one-time color picker, though color resets can still matter if automatic restore is turned off.

Useful, but only as far as your calendar app agrees

Calendar Colors is firmly an Android utility, not a full calendar organizer, and that narrow scope works in its favor. It is meant for users who want better visual separation across work, personal, and shared calendars without changing their main calendar app. Its biggest limitation is compatibility at the viewing stage: some calendar apps honor provider color values well, while others can display them differently or ignore them. That makes the tool handy, but not universally consistent across every calendar viewer.

Better calendar colors, with a catch

For users who hate Android’s limited default calendar colors, Calendar Colors solves a real annoyance with a clean, targeted idea. The no-root setup, manual restore option, and automatic restore service give it clear practical value. The tradeoff is that it works best when the calendar viewer respects the same provider colors, and that is not guaranteed everywhere. As a niche utility, though, it does exactly the job it sets out to do.