Color Calendar Widget based on Calender

[Music Case 13]

Hello,

So i'm currently messing around with the calendar to try and get the UpcomingEvents widget to correspond with the different calendar colors. My original idea was something like this:

{{if \IPS\calendar\event::container()->calendar_id === 1}}
<style>
#ipsCalendar {
  background-color: [color];
}
</style>
{{elseif \IPS\calendar\event::container()->calendar_id === 4}}
<style>
#ipsCalendar {
  background-color: [different_color];
}
</style>
{{endif}}

but this returns a PHP error i presume it's because i got the string wrong for the calendar ID's but i can't find anything in the code of my site or on the internet which would indicate anything else.

Any help would be greatly appreciated!

 

Thanks.