What Actually Is Blue Raspberry?

Everyone has a favorite flavor. Strawberry, or grape, or Pina Colada if you were the weird kid. However, there’s an unspoken agreement that every flavor is based on something you’d eat in the real world, and nothing throws a funky monkey wrench into the works like blue raspberry. This Frankenstein's Monster of sugary creations with its distinct electric color can’t be based on anything found in nature… can it?