Thirty years ago, a professional club presented two jerseys per season. Today it presents three, sometimes four, and a fifth may appear for a European night. Many supporters see this as nothing more than a sales machine. That is part of the explanation, but not the first: at the root of this entire system is a very concrete sporting rule prohibiting two teams from playing in colors that the referee or the public could confuse. Everything else, including the third and fourth kits, was built on top of it.
The color-clash rule, the origin of it all
Competition regulations, in both domestic leagues and European cups, require the same thing: the two teams must be distinguishable without hesitation, including for color-blind spectators and on a televised image. Goalkeepers must also be distinguishable from their own players and those of the opposing team. Each club therefore registers its kits before the competition, and the organizer decides on a match-by-match basis according to the combinations.
The home team generally plays in its usual colors. If the visiting team wears colors that are too similar, it must change. When neither of its first two kits resolves the clash, especially in tricky combinations such as red versus burgundy or navy blue versus black, the third kit becomes the only regulatory solution.
This constraint explains something many supporters find absurd: the fact that a club sometimes plays in its away kit even when it is the home team, or brings out its third kit in a stadium where no one expected it. It is almost never a marketing decision made on the night; it is the mechanical consequence of a color-compatibility chart approved before kickoff.
How teams went from two kits to four
The four kits, one by one
It carries the club’s identity and hardly ever strays from it: the historic colors, the traditional arrangement, stripes, bands, or a solid color. It is the best-selling, most recognizable, and most constrained kit, because any bold move is seen as a betrayal by some supporters.
Its purpose is regulatory before it is aesthetic: to provide a clear contrast with the home kit. Hence the historical dominance of white, navy blue, and black. It is also the kit that welcomes the first graphic risks, since its identity requirements are more flexible.
Officially, it resolves color clashes that the first two kits cannot settle, especially in European competitions. In practice, it has become the equipment manufacturers’ testing ground: unexpected colors, references to the city or a legendary season, and patterns that would be impossible elsewhere.
An additional jersey, generally produced in a limited edition, associated with a competition, an anniversary, or a collaboration. Its sporting function is secondary; its cultural function is central: it is worn as much outside the stadium as inside it.
Why the third kit really exists
Reducing the third kit to a commercial operation is tempting, but that overlooks three distinct functions that explain its widespread adoption.
In European competition, a club faces opponents it has never played before, with unpredictable color palettes. Statistically, two kits are no longer enough, especially for clubs whose home and away kits remain within the same color family.
It is with the third kit that manufacturers test what they would not dare try on a home kit. An idea that works there returns two or three seasons later on a primary kit, once the public is used to it.
A third kit with a bold design sells to people who will never go to the stadium because it works as clothing before it works as a sign of belonging. That is what brought the jersey closer to fashion.
The home kit belongs to the club, the away kit belongs to the regulations, and the third kit belongs to the designer.
A simple way to sum up the logic of the three kitsWhich kit to buy based on your profile
The four kits are not intended for the same use, and the identical price masks very different lifespans in a wardrobe.
| Game | Club identity | Everyday wearability | Rarity in the stands | Longevity |
|---|---|---|---|---|
| Home | Maximum | Varies depending on the colors | Very low | Timeless |
| Away | Medium | Excellent | Medium | Good |
| Third | Low to medium | Excellent | High | Dated |
| Fourth | Often secondary | Excellent | Very high | Depends on the occasion |
One final criterion is often overlooked: the sponsor. For some clubs, the third kit also changes its main sponsor or the color of its lettering, and sometimes this difference, more than the jersey itself, makes one version much more wearable than the other in everyday life.
Concept jerseys follow the logic of the third kit exactly: unrestricted designs, freed from the identity constraints of the main kit, exploring what a club could be without its usual specifications.
Discover concept jerseysFrequently asked questions
The competition organizer, based on the kits declared by both clubs at the start of the season. The home team generally retains priority for its usual colors, and the visiting team changes if the contrast is deemed insufficient. The referee may intervene up until the last moment, particularly when a goalkeeper’s kit is too similar to that of the outfield players.
No, and that is precisely what makes it interesting. Over a full season, a third kit is generally released for a handful of matches, sometimes fewer, often in European away games. It is the rarest jersey in the stands, which explains why it has become a favorite among collectors and supporters looking to avoid wearing the same thing as everyone else.
A fourth kit is a fourth numbered kit, often approved for competition and therefore worn on the pitch. A special edition may never be worn in a match: it celebrates an anniversary, a city, or a collaboration, and is primarily intended for everyday wear. The boundary is blurred, and some clubs use both terms for the same product.
Because the contrast rule applies to them too, and twice over: they must be distinguishable from their teammates and from their opponents. A goalkeeper therefore has their own set of kits, generally in shades that the club uses nowhere else—fluorescent green, gray, or orange—precisely because these colors remain available whatever the match combination.
A system that becomes clear once you know the rule
What looks like product inflation is actually the accumulation of three successive forces: a sporting rule born in the 19th century, a requirement for television readability that emerged in the 1970s, and a textile economy that became central in the 1990s. The third and fourth kits are not gratuitous inventions; they are the most recent layers of a system that has always had the same problem to solve: distinguishing two teams on a pitch.
The practical question remains: which jersey do you actually wear? If you are hesitating between the two main kits before going further with your collection, our comparison of the home and away jerseys details the criteria that tip the balance.