In soccer, you have teams that use white for home games, other use warm colors and others use darker colors. I think it's just a matter of the home team using their primary jersey and the away team using a jersey with a color that can differentiate from the home jersey, whether it's their primary or secondary/third jersey. a.
The visiting team shall wear solid white jerseys and solid white socks, and the home team shall wear dark jerseys and socks (dark is defined as any color which contrasts with white). The color gray and/or any other light colors being used for a home jersey, must meet the 70% shading of the main color being used in the jersey in order for it to clearly contrast with white. The Tigers, Nationals and Yankees all wear their cap insignia on the left breast of their home jerseys, but the city name on their away jerseys.
In addition to this, some teams have featured mainly their team's location presented on their uniforms both at home and on the road. White jerseys emerged as a practical solution, providing a stark contrast to other colors and making it easier for spectators and officials to differentiate between the teams during matches. Moreover, white jerseys have also become symbolic of the home team in many soccer tournaments and leagues.
Or - (and this is where your third jersey explanation comes in) the road teams wear white so that the home team can use its third jersey. A third jersey is usually another colored jersey that is either futuristic or a throw-back to a previous color scheme/design that a team will wear strategically to sell more merchandise to its fans. Moreover, if the away team also wears the same coloured jersey, it would result in chaos on the field.
The away team hence wears a that is stark contrast to the colours of the home jersey. Take. Each goalkeeper must wear colors that distinguish him/her from the other players, the referee, and the assistant referees.
The home team shall wear their darker colored jerseys and the visiting team shall wear their lighter colored jerseys. If there is still a conflict, the home team must change. Beginning next season, visiting high school soccer teams will be required to wear solid white jerseys while the home team will wear dark colors.
It's one of nine rules changes approved by the NFHS ahead of the 2018. Why are away uniforms a different color? Explore the surprising origins, rules, and impact of away jersey colors in major sports.