The change appears to align with the company's "Back to Starbucks" strategy under CEO Brian Brian Niccol, who assumed the role in August. The barista union has objected to the dress code change.

Starbucks (NASDAQ:SBUX) is creating a dress code for baristas, with a goal to make its green aprons stand out and create a sense of familiarity for customers. Beginning on May 12, the dress code in all stores will focus on simplified color options that the company says will let the iconic green aprons shine and create a warmer atmosphere at stores

Starbucks Coffee Company made a few changes to its dress code for baristas in all North American stores amid the "Back to Starbucks" plan.