How tough each team's road is. Bars run from the league-average line: purple means harder opponents, green means easier ones.
Opponent strength is all-play win%: the share of the league a team has outscored each completed week this season. It's a team's win% if it played every other team every week, so a league-average team is exactly 50%, and it isn't skewed by who a team happened to draw.
Strength of schedule is the average all-play win% of a team's opponents, counted once per game. Remaining uses the regular-season games still to play, including this week until it's final. Played uses the games already finished.