Trademark M is blue. McDonald's golden M trademark has always been a well-known international symbol around the world. There is a McDonald's in the United States that was forced to use a light blue M logo in compliance with local government regulations. It unexpectedly became a popular local check-in spot and was dubbed McDonald's Little Blue Bag by netizens. McDonald's is a large multinational restaurant chain in the world. McDonald's revenue in 2022 was US$23.18 billion. It was founded in Chicago, USA in 1955 and has approximately 30,000 branches around the world. It mainly sells hamburgers, as well as French fries, fried chicken, soda drinks, ice products, salads, fruits and other fast food.