Black and/or white. Mandatory apron (given to you). No grey, maybe cream (depending on the store). Colors on a white or black t-shirt is allowed as long as it can be hidden by the Lush apron. No logos or offensive material allowed. Colored tights, ties and accessories are allowed. Some stores have "dress up days" when you can dress in pink like the Snow Fairy line, purple like the Sleepy line, etc. usually around the holidays.
Tank tops and shorts are allowed.Any shoes as long as they're closed toe and comfy. I usually wore comfortable black jeans or trousers and a black or white t-shirt. I had a colleague who wore black skirts and dresses.
Prepare to be covered in glitter.