Medellín is 6 hours behind Rome
Best overlap: 2:00 PM to 6:00 PM in Rome is 8:00 AM to 12:00 PM in Medellín.
Keep meetings inside 2:00 PM to 6:00 PM in Rome — that maps to 8:00 AM to 12:00 PM in Medellín. With 4 hours of overlap, 2:00 PM in Rome (8:00 AM in Medellín) is a comfortable, repeatable slot for both sides. Keep an eye on the calendar — Rome observes daylight saving and Medellín doesn't, which nudges this window by an hour twice a year.