Tree of Colors

I found this tree in the alley behind my apartment. The photo does not do it justice, but if you look closely, you can see a rainbow of colors in the bark. I have never seen anything like this before, and I'm really quite puzzled by it. In person, it is bright green, purple, red, orange, blueish gray. It looks like the colors emerge as the bark is stripped off. This yard had two of these trees, and I promise it's not fake. It reminds me of something out of Charlie and the Chocolate Factory, and I would love to find that this magical tree is actually made out of taffy. Probably not, but it still left me pondering.