Same maximal hue difference: yellow-green and purple.
Same maximal luminosity difference with the luminosities inverted: the naturally light yellow-green made dark by adding black; and the naturally dark dioxazine purple made light by adding a lot of white.
And same medial intensity difference, but here the yellow-green is made moderate-intensity by adding a moderate amount of black; and adding a lot of white to the purple has made it very low-intensity, hence a medial intensity difference relationship.