Like many good ideas, its so simple you wonder why nobody had thought of it before. But credit goes to japanese clothing brand uniqlo for bringing fashion retailing into the age of the convenience store. Located in tokyo that sells nothing but t shirts packed into clear plastic tubes and stacked like so many cans of soda. Pantone number is written on each package. If youre after something less fancy, youll find plain, monochromatic shirts sold according to pantone color.