With that, we can see in the dark, but that's not all ... they could give off a violet or even full-on purple light. This is nothing compared to the biggest downside of LED lighting, but it's ...

Purple potatoes have flesh ranging from light to dark purple. They contain much more anthocyanin than orange sweet potatoes, with levels similar to those in blueberries and blackberries.

Birds and insects are only able to display purple through structural colouration. This is where tiny structures in the feathers of birds or the scales of butterflies and beetles are used to reflect ...