Any oppression by color or pretense of right, and particularly the exactionby an officer of money, by color of his office, either when none at all is due, ornot so much is due. or wyhen it Is not yet due. Preston v. Bacon, 4 Conn. 4S0.Extortion consists in any public officer unlawfully taking, by color of his office, fromany person any money or thing of value that is not due to him. or more than his due.Code Ga. 1882,