You can't. Muji can wear casual pants, sweatpants, jeans without holes, skirts that don't touch the ground above the knee, and shoes without sandals, slippers and high heels. You can wear seven basic colors, white, beige, brown, gray, khaki, blue and black, but you can't wear purple. Muji, a Japanese grocery brand, was founded in 1980, and registered and operated by the Good Product Program of Co., Ltd., and its brand name means good products without brand logo.