Jira Advanced Roadmap: Displaying the Time an Epic is overdue

[Aron Peterseim]

Hello,

I would like to display the difference between an Epic's planned Due Date and the actual Date it was completed. Ideally, the Gray Bar representing the Epic should turn Red once it has passed a certain threshold (it's due Date), with the remaining red bar showing how far an Epic was over our initial Estimate.

Having a marker somewhere on the gray Bar displaying the moment when the Epic was "overdue" would also be an acceptable option.

I'm not really sure where to begin here, so a couple of questions: 

A: can you make an Epic have multiple colors? (with the switch in colors representing a Date)

B: Can you somehow record both the "Due Date" and the "Target Date" on the same Epic (with them each being different and representing planned/actual completion time)

C: Can Epics have markers on them in the roadmap (representing a certain Date)