1. A retail product package comprising: a first printed area, the first printed area comprising a combination of i) data representing first color data (S1), and ii) data representing second color data (S2), in which encoded information is provided on said retail product package through modulation of the data representing second color data (S2) with max (positive) and min (negative) tweaks; in which the combination has been optimized by: determining a color error between data representing third color data (S3) and a combination of S1 and S2, determining an information modulating error associated with the max and min tweaks; and finalizing the combination of S1 and S2, including minimizing the color error and minimizing the information modulating error; and a second printed area including a 1D or 2D barcode; a third printed area including text information printed thereon.