What do the colors on the time bar mean?

There are three color settings available for each rule:

Set the color for partially reserved time to be similar to the color for available time. This way, if at least one spot remains, the time bar will not appear as fully reserved. In the example, there is 1 spot left in the interval from 5:00 AM to 10:00 AM, while the interval from 10:00 AM to 1:00 PM is fully booked.

If you prefer not to highlight partially reserved times, set its color to match the color for available time.