1. A color calibration method, comprising: storing a color image in an RGB color modeling space; printing the color image; prompting a user to select a memory color appearing in the image; prompting the user to select an adjustment to the selected memory color; in response to the user selecting a memory color, transforming an RGB model color value representing the selected memory color to a CIELab model color value; in response to the user selecting an adjustment to the memory color, adjusting the CIELab model color value; transforming the adjusted CIELab model color value to a CMYK model color value; and printing an adjusted color image based on the CMYK model color value.