Maximal hue difference: still blue-purple (this time much lighter) on yellow (this time darkened with a lot of black)

Maximal luminosity difference: light figure on dark ground

Maximal intensity difference: still intense blue-purple (though light) on a low-intensity slightly yellow ground

This color relationship (and the next) looks additionally dissonant because blue-purple is normally darker than yellow, which in this case is made darker than the purple.

William Tapley
Art of Color
Color Descriptions of
Sets   Paintings