To use events in Vertex, create a time series event object type and add one additional Vertex type class to set the color and/or severity of the alert (this can be on any column, but typically the primary key):
Orange: kind: vertex, name: event_intent.warning
Red: kind: vertex, name: event_intent.danger
Blue: kind: vertex, name: event_intent.primary
Green: kind: vertex, name: event_intent.success
You can configure these type classes in the Capabilities tab for the event object in the Ontology Manager or directly in the type classes for the properties of the object.