Method for correcting a color measurement output using a display test equipment which comprises a wideband color measurement device and a narrowband multiple channel spectrometer, the method comprising: calibrating the wideband color measurement device by: configuring the wideband color measurement device and the narrowband multiple channel spectrometer to measure color; stimulating the wideband color measurement device and the narrowband multiple channel spectrometer with predetermined test patterns; capturing color measurement data from the wideband color measurement device and the narrowband multiple channel spectrometer; and determining a correction matrix relating the captured color measurement data; and correcting the color measurement output of the wideband color measurement device with the correction matrix, wherein the color measurement output of the wideband color measurement device is compared against output of the narrowband multiple channel spectrometer as to whether the color measurement output of the wideband color measurement device is within a tolerance specification so that if the corrected color measurement output of the wideband color measurement device is within the tolerance specification, the correction matrix is used, and so that if the color measurement output of the wideband color measurement device is outside the tolerance specification, the steps for calibrating the wideband color measurement device are repeated to make the color measurement output of the wideband color measurement device be within the tolerance specification. calibrating the wideband color measurement device by: configuring the wideband color measurement device and the narrowband multiple channel spectrometer to measure color; stimulating the wideband color measurement device and the narrowband multiple channel spectrometer with predetermined test patterns; capturing color measurement data from the wideband color measurement device and the narrowband multiple channel spectrometer; and determining a correction matrix relating the captured color measurement data; and configuring the wideband color measurement device and the narrowband multiple channel spectrometer to measure color; stimulating the wideband color measurement device and the narrowband multiple channel spectrometer with predetermined test patterns; capturing color measurement data from the wideband color measurement device and the narrowband multiple channel spectrometer; and determining a correction matrix relating the captured color measurement data; and correcting the color measurement output of the wideband color measurement device with the correction matrix, wherein the color measurement output of the wideband color measurement device is compared against output of the narrowband multiple channel spectrometer as to whether the color measurement output of the wideband color measurement device is within a tolerance specification so that if the corrected color measurement output of the wideband color measurement device is within the tolerance specification, the correction matrix is used, and so that if the color measurement output of the wideband color measurement device is outside the tolerance specification, the steps for calibrating the wideband color measurement device are repeated to make the color measurement output of the wideband color measurement device be within the tolerance specification.