Stockholm 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 Stockholm.
Medellín and Stockholm overlap from 8:00 AM to 12:00 PM (Medellín) to the equivalent 2:00 PM to 6:00 PM in Stockholm — 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. The difference isn't constant year-round: Stockholm adjusts for daylight saving while Medellín holds steady.