1. A method for matching colors comprising: providing a first source of a first color and a second source of a second color; measuring a first set of spectral values for first color stimuli associated with the first color with a spectral measurement device controlled by a digital processing system; calculating a first set of tristimulus values from the first set of spectral values; defining a first set of human observer color matching functions, the first set of human observer color matching functions being functions of the first set of tristimulus values of the first color; calculating a first set of corrected tristimulus values from the first set of spectral values using the first set of human observer color matching functions; measuring a second set of spectral values for second color stimuli associated with the second color with the spectral measurement device controlled by the digital processing system; calculating a second set of tristimulus values from the second set of spectral values; defining a second set of human observer color matching functions, the second set of human observer color matching functions being functions of the second set of tristimulus values of the second color; calculating a second set of corrected tristimulus values from the second set of spectral values using the second set of human observer color matching functions; determining a difference between the first set of corrected tristimulus values and the second set of corrected tristimulus values; and adjusting one of the first and the second source to reduce the difference.