After years of letting baristas bring their full selves to work — tattoos, flannels, colored hair, and all — Starbucks is reining things back in.

As of May 12, the company is streamlining its dress code to play up its signature branded green apron. Per the coffee chain’s new mandate, baristas will wear any black short- or long-sleeved crewneck, collared or button-up shirts with khaki, black or blue denim bottoms. Starbucks will be serving up two branded T-shirts for employees — at no charge.

Why even a coffee chain needs standards—and so does your business. A dress code can give a look and feel of consistency and that's good.