The most common color of money is green.
This is because the United States dollar, which is the most widely used currency in the world, features green as its primary color.
While other currencies may have different dominant colors, the widespread use of the US dollar and its iconic green hue make it the most common color associated with money globally.
For example, the Euro is primarily purple, the Japanese Yen is blue, and the British Pound is purple. However, the green of the US dollar remains the most recognizable and widely associated color with money.