Honolulu is 5 hours behind Medellín
Best overlap: 1:00 PM to 6:00 PM in Medellín is 8:00 AM to 1:00 PM in Honolulu.
The overlap falls at 1:00 PM to 6:00 PM in Medellín, or 8:00 AM to 1:00 PM if you're in Honolulu. Roughly 5 hours of common time means scheduling is manageable; just avoid the very edges of the window.