What clothes to wear as a dishwasher?

Hello all! I start a new job as a dishwasher on Friday. My friend that works there suggested I wear my brown knee-length leggings. I don't want to wear something way too cly but I don't want to wear something that looks too bad. I'm thinking maybe sweatpants and a long sleeve shirt (I can roll up the sleeves). What do you suggest? Thank you.