The chips in the paint should give some clues. If you can see a layer of chrome or metallic paint under the color, it would be a type of candy. From the picture it looks like a color coat with a pearl coat over the top, which would give the "chameleon" color-shifting effect you're talking about. I've had two framesets done this way, with a solid color powdercoat under a color-shifting pearl powdercoat. The effect is pretty dramatic in bright sunlight!