How do AutoColors work?

Auto Colors allow you to automatically display events with a custom color in your calendar based on rules matching with either:

For example, you can make all events with the text 'Lunch' show up as blue or events at 'Office 14" colored red.

Auto Colors don't appear to work

The most likeliest reason is that the event for which an Auto Color is not working already has assigned a custom color to it. If you remove the assigned custom color of the event, the Auto Color will take over.

Priority of determining the color of an event is as follows:
  1. Custom color assigned to an event
  2. First matching Auto Color rule
  3. Color of the event's calendar