Event colorsThere are three ways to assign different colors to your events:
The normal way to use different colors for events is to use different calendars, please see the Calendars page. This way you can easily see by the color of an event what kind of event it is (e.g. "work", "home", ...).
Google event colors
Google added a way to assign different colors to events of the same calendar. CalenGoo supports this function when syncing directly with Google Calendar using OAuth2 (please see below).
However if for some reason you cannot use different calendars for your events, you can use the “Proprietary colors” feature (please see below). Then you can assign individual colors to events but they will be visible only in CalenGoo.
Proprietary colorsThe normal way to use different colors for events is to use different calendars, please see the Calendars page. However if for some reason you cannot use different calendars for your events, you can use the “Proprietary colors” feature: Just enable it under “Settings”, “Display and Use”, “General”, “Proprietary Colors”. Afterward you will find a new option when editing events: “No individual color”. Just tap it to assign an individual color for this event. It will be saved as e.g. “[color:ff0000]” in the description field. This color will be visible only in CalenGoo but not in Google Calendar.
Google has a function to change the color of single events instead of using different calendars:
Newer version of Android (at least 4.0.3 and newer should support it, but it might be necessary to have the Google Calendar app installed) should support it by default. On other devices or if it doesn't work yet, you have to sync CalenGoo directly with Google using the "OAuth2 Login" method. Just tap "Settings", "Accounts" in CalenGoo. Then remove or uncheck all accounts that you don’t use. Afterward tap "Add account", "OAuth2 Login" to add your Google Calendar account. When editing an event that was synced via OAuth2, you will get an additional bar to select colors below the calendar row in the edit view (please see the screenshot on the right).
New events will still be displayed using the color of the calendar they belong to unless you specify an individual color for that event using this new function. So you don't need to specify a color for all your events, only for special events that you would like to highlight.