1. A method for determining a transform of color image information for the recordal of transformed color image information on a selected object medium with control of color relative to a selected reference medium, said method comprising the steps of A. mapping a color response of said object medium according to a selected colorimetric color space with a color response of said reference medium according to said selected colorimetric color space, and B. normalizing said color response of said object medium with reference to a maximal brightness attainable therewith relative to a maximal brightness attainable with said reference medium.