Colour Challenge: A yellow butterfly and his wife

From the same location as these butterflies I posted yesterday:

A brimstone (Gonepteryx rhamni), citroenvlinder in Dutch, meaning "lemon butterfly":

^{Olympus Stylus 1s, 300mm, ISO100, f5.6, 1/640s}

The female is greener:

^{Olympus Stylus 1s, 300mm, ISO100, f5.6, 1/2000s}

Thanks for watching!