HexCal is a Chrome extension for Google Calendar colors.
HexCal does not collect personal information. It does not have an account system, analytics, or a backend. It does not send your calendar events, palette, or browsing data to us or to anyone else.
Palette colors, title rules, and which events you recolored are stored in
Chrome’s extension storage on your device (chrome.storage.sync
for palette and rules, chrome.storage.local for per-event
colors). Chrome may sync palette and rules across your signed-in Chrome
browsers if you have Chrome sync enabled.
The extension only runs on calendar.google.com so it can
paint events and add HexCal to the color picker.
Last updated: September 8, 2026