Orange? Yellow? It depends?
There are two Holy Grails in color study. Perfect primaries and exact complements. After years of searching for both, I have come to the conclusion that perfect primaries do not exist and exact complements do not matter.
Expand the range of the traditional pairs and you have a good enough guide:
Blue-Orange = Any color from Cyan to Blue Violet and any color from Yellow to Red-Orange.
Red-Green = Any color from Magenta to Red-Orange and any color from Blue-Green to Yellow-Green.
Yellow-Purple – Any color from Yellow Green to Orange Yellow and any color from Blue-Violet to Red Violet.