Numenéra: Gift of the Calimshan
From the tales of Garven:
The woods are a really queer purple tone, and not just the leaves. The trees too, with woods ranging from a simple magenta to a lovely violet. The forest is alive with birds and animals of all colors and kinds, very few of which are themselves purple.
No large beasts or predators live there, but it is suspected that several bandit bands and raiders make their homes there. We are best advised to stay away, and most mportantly, never eat the fruits of the purple trees. Just don’t.