User talk:2601:80:C87F:8310:FDA3:53EA:DA13:BD4F

Okay, someone has to explain this: https://en.wikipedia.org/wiki/Round-robin_tournament#/media/File:Round-robin_tournament_10teams_en.png to me. what does break mean in the bottom right? Why are some teams in light blue? Why are some of the arrows in blue. Please explain!