It should be noted that the axis of of the XYZ color space does not perfectly corresponded to the cone sensitivity of the human eye. The X and Y are close but t

It should be noted that the axis of of the XYZ color space does not perfectly corresponded to the cone sensitivity of the human eye. The X and Y are close but there is significant error in the Z (blueish). If you need to isolate colors to a single cone in the human eye you need to use the LMS color space. I which stands for the long, medium, and short wavelength cones.