HAMILTON, Canada US-based coffeehouse chain Starbucks announced that it will implement a stricter dress code for employees across North America, limiting clothing options to a defined set of colors starting May 12. The updated guidelines permit only "solid black short and long-sleeved crewneck, collared, or button-up shirts" and pants in "any shade of khaki, black, or blue denim," according to a company statement Monday. The policy also introduces company-branded T-shirts, with each employee