Meal menu at our company cafes are color coded. Green means healthy. Red means unhealthy, Yellow means somewhere in the middle. The cafe in our building happens to be one of the healthiest among them all. It means when you walk in there, most days you see only green and yellow colored items on the menu.
We had some engineers from an Asian partner company coming and working with us for a week recently. By the third day, they had the color code figured out. When their host, to save time, took them go the cafe downstairs, they solemnly demanded, “We want red food! Red means delicious!”