Munich is 6 hours ahead of Medellín
Best overlap: 8:00 AM to 12:00 PM in Medellín is 2:00 PM to 6:00 PM in Munich.
Medellín and Munich overlap from 8:00 AM to 12:00 PM (Medellín) to the equivalent 2:00 PM to 6:00 PM in Munich — that's your meeting window. The shared window is roughly 4 hours; treat its midpoint as the default and you'll keep both teams happy. A quick caveat — Munich's clocks move for daylight saving and Medellín's don't, so the times here are right for only part of the year.