How is the color of a referee's uniform defined, in soccer matches, when they aren't wearing all black? - Quora
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1 Stop Soccer Official Referee Soccer Jersey with Velcro Color: Blue, Size: Adult Medium - Walmart.com
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Amazon.com: WEARCOG Men's Pro Soccer Referee Shirt | Half Sleeve Jersey, Ref Costume Jersey for Men's | Reffing Shirt for Soccer, Basketball & Football | Umpire Referee Uniforms : Sports & Outdoors
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