1. A computer-implemented method for color calibration of a color display device, the method comprising: presenting on the color display device a first color stimulus; receiving from a user one or more natural language commands to adjust the first color stimulus until it appears to visually match a first fixed reference stimulus in color and luminance, wherein a first adjusted color stimulus comprises a set of digital values and the natural language commands for adjusting the color stimulus comprise at least a command to match the first color stimulus to the first fixed referenced stimulus, a direction in which the adjustment takes place, and a magnitude of change along the direction; using the digital values of the first adjusted color stimulus to derive at least one calibration tone response curve (TRC) for the color display device; presenting on the color display device a second color stimulus; receiving from the user one or more natural language commands to adjust the second color stimulus until it appears to visually match a second fixed reference stimulus in color and luminance, wherein the second adjusted color stimulus comprises a set of digital values and the natural language commands for adjusting the color stimulus comprise at least a command to match the second color stimulus to the second fixed referenced stimulus, a direction in which the adjustment takes place, and a magnitude of change along the direction; using the digital values of the second adjusted color stimulus to refine the at least one TRC for the color display device; and applying the calibration function to produce corrected colors on the color display device.