Actually the uniforms are illegal, if the officials decide to make issue of it in a game the opposing team gets a free possession one time at the beginning of the game. From what I saw at tournaments many teams' uniforms are illegal (including YJ), most because of the size of the side inserts.
From US Lacrosse 2016 rulebook: "Uniform trim is permitted on the collar, cuffs and waistband that may be of contrasting
colors, but not more than 1 inch wide. Side inserts (armpit to waistband) may be of
contrasting, multiple colors, but not more than 3 inches wide." | 
