Green with entropy?

Regardless of who invented it, the first people to make green beer probably made it the same, slightly unintuitive way it’s made today: a mixture of beer and blue food coloring (the blue mixes with the natural yellow of the beer to make green).
— Phil Edwards, writing at Vox

If a warning flag didn’t pop up in your brain after reading the preceding words, then you’re probably not a member of the target audience for my thoughts today, and you might be more comfortable here.

This said, my own warning flag flies in the form of a question: Is yellow really the natural color of beer, or just the most customary shade experienced during modern industrial brewing times?

And: What type of food coloring is needed to turn Guinness green? Or for ...Read more