Abstract: A method for converting video RGB values developed in a digital video color analysis system into standard tristimulus or CIELAB values or the like comprises empirically determining separate RGB and XYZ color values for a plurality of colors; determining by regression analysis the value of X as a function of R, the value of Y as a function of G, and the value of Z as a function of B, using only gray scale colors where the RGB values are approximately the same; determining the X value by further regression analysis determined to find X as a function of the previously computed values of the multiple variable X, Y and Z, using color values including colors where the RGB values are not identical; determining an intermediate value of Y in the same manner as the foregoing value of X; performing an additional regression analysis to find a second intermediate value of Y as a function of the second intermediate value of Y; determining an error value representative of the difference between Y and the first intermediate