When playing in tournaments of this nature, where you're switching to different color uniforms on any given day, it should be STANDARD protocol for every team to ALWAYS bring BOTH sets of uniforms to the arena for EVERY game to prevent misunderstandings like this.
When my granddaughter's high school basketball team would play in tournaments, it was the head coach's team policy that they
ALWAYS brought BOTH color uniforms to
ALL of their games just in case, regardless of the color they were scheduled to wear. Sometimes they didn't get dressed until they arrived at the arena. No way to come out in the wrong color uniform doing that.
Once at a holiday tourny, it paid off when the other team showed up (dressed at home) in the wrong color uniform. Simple fix, we changed into our other one (because we brought both), and the game was played as scheduled. Sometimes crap happens that's not your fault.