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

Starbucks workers show what new dress code looks like after more than 1,000 baristas go on strike Baristas are now expected to wear solid black shirts and khaki, black, or blue denim bottoms.

Starbucks announces new barista dress code. Here’s what it looks like Sun., ... experience that will also bring simpler and clearer guidance to our partners,” the company’s statement read, ...