SDCM Lookup

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You can use this to compare a target XY color coordinate to a given XY value, to see if it is within your chosen Standard Deviation for Color Measurement (MacAdam Ellipse) The red dot on the plot is the Target and the blue dot is the test color. If the blue dot is within the ellipse, and the SDCM is set to "1", then most people will not see a difference between the two colors.