St. Patrick’s Day usually conjures images of partying, Catholicism, Irish nationalism and, perhaps most famously, the color green: green clothes, green shamrocks, green beer and green rivers.

Puzzle fans have been left scratching their heads at a deceptively difficult brainteaser, which asks you to spot the plane camouflaged against the grey sky. Can you find it?

These materials showcase many aspects, like how artisans garnered the colors they needed in yesteryears and the items that ...