Colors can change shade, or metamerize, under different light sources, so when Harfouch hits on a perfect match he has to be sure it looks the same under sunlight as it does under artificial, supermarket light.

FORBES: Jelly Beans: Which Color Is Most Popular At Easter? Why We Love Colored Foods

US-based mapmaker Rand McNally, for example, changes national borders only when the US State Department recognises a change, although it will shade areas under dispute.

BBC: The politics of making maps

Of those who bothered to vote in April, 91% wanted reform, but the turnout was a shade under 50%, too low for the change to take effect.

ECONOMIST: Unchanging Italy