With version 4.64 you have the possibility to set up for each service activity a specific color. GroupCalendar setup will create automatically a picklist attribute on the service activity entity which is used for this feature. To activate color-coding for service activities, you have to add this attribute to the main form of the entity. The attribute is named ptm_colorcode with the display name Color and is predefined with 12 colors.
Please note: Requires GC v4.61 or higher
There are four settings in the GC settings named