I am using the customEvent on the default calendar module to highlight birthdays and bin days. The symbol part works, but the colour does not change.

I am not sure what I am doing wrong so that this is not working? Am I missing something here?

Apologies if this is a really silly question.

{
	//CALENDAR
	module: "calendar",
	header: "",
	position: "top_center",
	config: {
		maximumEntries: 3,
		maximumNumberOfDays: 90,
		limitDays: 0,
		customEvents: [
		{keyword: "birthday", symbol: "cake-candles", color: "gray"},
		{keyword: "black bin", symbol: "trash", color: "gold"}],
		calendars: [
			{
			fetchInterval: 30000,
			symbol: "none",
			url: ~"<<ICAL>>"
			}
	]
}
},