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A colour commentator (color analyst, analyst) is a sports commentator who assists the play-by-play announcer, often by filling in any time when play is not in progress. 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.
Canada and the United States 
Commentary teams typically feature one professional commentator describing the passage of play, and another, usually an ex-player or manager, 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 build-up to the match, at half-time and post-game. In American motorsports coverage, there may be as many as two color commentators in the booth for a given broadcast. In addition to the broadcast of the game or event itself, pregame and postgame programs typically feature commentary from one or more analysts.
United Kingdom 
In the United Kingdom, the term "colour commentator" is relatively unknown; rather the role is called "summariser", "analyst", "pundit" or "co-commentator". Cricket coverage on Cricinfo.com uses similar terminology.
In Australia, the term is not used. Those giving the analysis alongside the main commentator are sometimes said to be giving "special comments", or may be referred to as "expert commentators".
Latin America 
In Spanish and Portuguese-speaking countries, the position is known as a comentador (commentator; comentarista in Brazilian Portuguese), in opposition to the narrador (narrator) who describes the action. Similarly, in Finland kommentaattori is used for the second commentator, and selostaja (explainer) for the main one.
In France, the term is "consultant" in opposition to the "commentateur sportif" (who is also a journalist)
In Italy, the color commentator is usually referred to as responsible for the commento tecnico (technical comment) whereas the play-by-play commentator is the main telecronista. In Italy too the color commentator is usually a person formerly directly involved in the sport (as an athlete/player/pilot or as a coach). Recent Formula 1 races have been commented by no less than 3 persons: the telecronista, a former pilot, and an engineer, the last two sharing the commento tecnico.
In Turkey, the term "spiker (spEE-ker)" is used for both announcers, who are expected to interchangeably act as the color commentator and the play-by-play announcer.
In some countries, the two-person commentating team is not used as much as elsewhere. In Germany, most broadcast of sports matches traditionally feature a single play-by-play announcer who also provides commentary, background information and statistics by him or herself. If the broadcast is on TV, the announcer will usually not comment on visually obvious things. A two-person commentating team is used more often for sports where understanding of events depends on more details and subtle visual cues that not everybody might instantly get or might need extra information in order to reasonably understand - for example in auto racing) or in winter sport). In those cases a co-commentator (normally a current or former athlete or coach) known in German as "Experte", is used.
In professional wrestling 
Though not always the case, in professional wrestling, the color commentator is usually a "heel sympathizer" (or a supporter of the "bad guys") as opposed to the play-by-play announcer, who is more or less the "voice of the fans" as well as supporters of the "good guys" (or babyfaces). Though both are supposed to show neutral stance while announcing, the color commentator (especially when they support heels) are usually more blatant about their stance than the play-by-play announcer. Jesse "The Body" Ventura and Bobby "The Brain" Heenan pioneered the "heel sympathizer" for color commentary in wrestling. Jerry "The King" Lawler later made a successful transition into the role, though Lawler has since shown more sympathy for faces (partially due to being over with fans after nearly forty years in wrestling). In some cases, commentators are also active managers for wrestlers, usually following continuity as heels. Former Extreme Championship Wrestling color commentator Cyrus was known for having dual roles as a heel manager and a somewhat neutral commentator. It has also been used to keep injured wrestlers in the public eye while they recuperate. Special guest color commentators serve a twofold purpose, the primary is usually to place them in position to interfere with the match they are calling, but also serves to tell the promotors if this performer can "talk" on his own in the ad lib driven commentary role.