Why is money green?

Answer 1

Money is green because the U.S. has the specific ink color that printers don't have. For that, people can tell when the money is fake or not.

More

US currency is no longer primarily green in color, except for $1 and $2 bills. The use of green ink dates back to the mid-19th century when that color was very difficult to reproduce using the comparatively primitive printing methods of that time. Modern printing techniques have made that obsolete, and current bills have multiple colors to make them more difficult to copy. Some parts of the bills' designs still used the familiar green ink, mostly as a matter of tradition.

Answer 2

that was the only color that the people who were making the money back then had and over time, the color fades so its sorta yellowish, creamish, greenish....