Starbucks is implementing a new dress code for workers across its North American stores next month, as the coffee giant aims to refresh its store image and boost business under CEO Brian Niccol.

Starbucks is updating its uniform policy, emphasizing the appearance of its recognizable “green aprons” as part of CEO Brian Niccol’s broader plans to revive the slumping brand. Beginning ...

Starbucks is imposing new limits on what its baristas can wear under their green aprons. Starting May 12, employees will be required to wear a solid black shirt and khaki, black or blue denim bottoms.