Young employees won't work for a company if they're going to feel ashamed when friends come in for a burger, or see them en route to work afer school. Designers and employers often survey employees to find out what they want to wear and look to the same places teenagers look for style. Styles tend to be casual and sporty. At the moment, McDonald's uniforms have large blocks of color on the shirts, Macek's reinterpretation of the athletic look popularized by mainstream designers like Ralph Lauren Polo and Tommy Hilfiger. Still, there's just so much you can do with a uniform.
Material still has to look good after chocolate milk spills.
Clothing has to endure long work days without becoming crumpled and shabby. Knowing that they must be worn often and replaced frequently, designers often keep the uniforms plain, and use less expensive accessories such as ties to reflect trendy colors and styles. They would make you nauseous. This job could not be done by a color blind person. And of course, there's the small issue of pleasing the company, which has logos, colors and a corporate image they want their uniforms to reflect.