How can I change the color of tentative ("Maybe") events in Calendar? I'd like to differentiate more between "Accepted" and "Maybe" events on my Calendar app.  Right now "Maybe" events are pinstriped with the same color scheme as "Accepted" events, and it's hard to differentiate them at a glance.  I'd rather they be different colors, though the pinstripes can remain.  

How can I do this?

I'm on High Sierra, version 10.13.6.
I have a calendar for tentative events and I move them there / make that my default calendar.

Once I accept the meeting, I recategorize it according to my other colors / must attend / optional / travel / etc...

It’s not automatic, but it works to get things color coded.