Colour commentator

A color commentator is a North American term for a sports commentator who assists the main commentator, often by filling in any time when play is not in progress. In other regions this role is variously referred to as an analyst or summariser. The color analyst and main commentator will often exchange comments freely throughout the broadcast, when the play-by-play announcer is not describing the action. The color commentator provides expert analysis and background information, such as statistics, strategy and injury reports on the teams and athletes, and occasionally anecdotes or light humor. Color commentators are often former athletes or coaches of the sport being broadcast.

The term color refers to levity and insight provided by a secondary announcer. A sports color commentator customarily works alongside the play-by-play broadcaster.

Commentary teams typically feature one professional commentator describing the passage of play, and another, usually a former player or coach, providing supplementary input as the game progresses. The color commentator will usually restrict his input to periods when the ball or puck is out of play or there is no significant action on the field and will defer to the main commentator whenever there is a shot on goal or other significant event, sometimes resulting in their being talked-over or cut short by the primary commentator. Additionally, former players and managers appear as pundits, carrying out a similar role to the co-commentator during the pre-game show preceding a given contest and the post-game show following it. In American motorsports coverage, there may be as many as two color commentators in the booth for a given broadcast.

...
Wikipedia