in highschool it was always long black skirts with some identical to everyone else's (and very plain/unornated) white or cream blouses-until the year our choir director got fed up with all the complaints about how the lights would reflect off the white/cream blouses and total wash out the faces of the singers-the next year he chose a black, gray and white floral patterned fabric for our blouses. we retained those blouses until a high profile choir competition where a judge wrote in his comments 'blouses look like they were made from casket lining'
the next year it was back to plain white/cream:rotfl