The weirdest thing happened to me in science cl today! what happened?

so we were doing an experiment that involved hydrochloric acid and zinc. they were mixed together in an evaporating dish and we boiled them. most of the kids in the cl could not take the fumes and had to leave the room because it was so bad. but i was fine. it didnt smell good and it bothered me a little. but i had to finish the experiment. so when we were done. a kid looked at me and said what happened to your shirt! i looked at it. and it turned purple!! it was blue, the retro brewers shirt, and it was totaly purple!! like it got bleached purple or somethin. it was so weird and the teacher didnt even no what happend. i was pretty mad cuz i liked the shirt. but about 2 hours later that day. it slowly faded away. and now sittin at home. its totaly gone and back to normal!!! i have no idea what happened!! anyone have any clue?