Limoncello, anyone?

Limoncello is an italian lemon liqueur, made from the zest of lemon (the one grown on the sunniest part of the peninsula), sugar and ethanol. It is traditional in the Amalfi coastal area and around Sorrento, but now it is made all around the boot, and quite a lot of people make it at home too, everyone with their own family-recipe. Limoncello is typically served directly from the freezer, after a meal during the summer and its sweet, citrusy flavour can bring sun to a cloudy day.
And why do I bring it up? The yellow colour of the butterfly in todays blip, Colias croceus, or cloudy yellow must have reminded some italian naturalist of the magical drink and therefore this attractive lepidoptera goes by the common name LIMONCELLA in Italy.