Dunkin' introduced a simpler logo -- and the chain's signature "powdered candy" pink color -- with a silhouette of a donut, formed by the name "Dunkin' Donuts," being dunked into a cup of coffee.

America runs on Dunkin’, and Dunkin’ runs on orange and magenta — two signature colors that represent a brand identity stronger than the chain’s coffee. So when a baker on Long Island, New ...