Assign Theme Colors to Calendars

calendar.ts

export abstract class CalendarConstants {
    static readonly CALENDAR_THEME_COLORS: string[] = ['calendar-light-green', 'calendar-green', 'calendar-dark-green', 'calendar-light-blue', 'calendar-blue', 'calendar-dark-blue', 'calendar-light-red', 'calendar-pink', 'calendar-claret-red', 'calendar-orange', 'calendar-dark-yellow', 'calendar-yellow'];
}

...

// assign color index
for (let i = 0; i < this.calendars.length; i++) {
  this.calendars[i].color = CalendarConstants.CALENDAR_THEME_COLORS[i % CalendarConstants.CALENDAR_THEME_COLORS.length];
}