This seems a good place to leave this: https://247sports.com/nfl/dallas-cowboys/Article/Ezekiel-Elliott-Dak-Prescott-fined-big-for-wearing-sleeves-126474751/Amp/
"So, why are the sleeves a violation?
Well, according the Article 4, Subsection J of the Uniform Policy, the sleeves don't match the team color, which is blue for the Cowboys -- not white. For example, wide receiver Cole Beasley has been spotted wearing sleeves multiple times in the past few weeks, but they were blue.
Are you effing kidding me?