The rule is to wear the same thing to the call back. It helps them remember who you were at the initial audition.
Consider picking up a book called Audition: Everything An Actor Needs To Know To Get The Part by Michael Shurtleff. Even though the advice is decades old, the book is widely considered the bible on the subject.
I wish the stage were as narrow as the wire of a tightrope dancer, so that no incompetent would dare step upon it. -Johann Wolfgang Von Goethe