The Southern English call them whortleberries. What can I say, they're strange folk down there ;) To be fair blueberries aren't that blue, and bilberries even

The Southern English call them whortleberries. What can I say, they're strange folk down there ;) To be fair blueberries aren't that blue, and bilberries even less so, it's about as self evident as describing white grapes as white. It's even possible the fruit predates the colour. That's the case for Orange which only became a colour in the 16th Century, and was named after the fruit.