The term commonly associated with baseball umpires references a specific color. This nickname, while ubiquitous in the sport, stems from historical attire and visibility considerations. The hue of their uniforms played a significant role in how they were identified on the field.
The historical context reveals that umpires initially wore dark blue suits, similar to those worn by officials in other sports. This color choice provided a degree of authority and distinction, aiding players and spectators in quickly identifying the individuals responsible for enforcing the rules. Dark colors also minimized distractions and blended with shadows when lighting was imperfect.