Could you implement the classnames event object for the calendar?
https://fullcalendar.io/docs/event-object
I assume I could color different eventtypes with it, which would be veeeeery helpful 
You can use the EvenitInit event to set the color:
Find attached a simple application that demonstrates the approach. We will also document the approach in the Scheduler help article.
scheduler-colors.zip (9.8 KB)
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