Select the Scheduler  module from the main menu to open up the Appointment Scheduler.

Click on the  icon to open the Legend pop up.

Click on the  icon to open up the Configure Appointment Status screen as shown below.

Click on corresponding to the appointment status for which the color needs to be changed.

Click on Pick to change the color of the status. The Status name can also be changed from this window.

On the proceeding Select Color window that pops up, click on the desired color.

Click on Update to save the changes.