It's true. (Relatedly, though not foodily: The colour-word pink comes from the flower, even though many pinks are not pink. And pinks are named for their jagged-edged leaves, which look as though they were cut for ornamentation... as in "pinking shears".)

Now you have me thinking of those red hunting coats worn by English aristos, known as "hunting pinks."

That one is true, too. William of Orange. He's also why carrots are typically orange now, instead of purple or white.

Curiously, the words for the colour orange and the Principality of Orange have different roots, so William of Orange (William III of England, and others) is originally unrelated to the colour. (I just went on holiday to Orange in France - beautiful Roman amphitheater)