There have been rumors that Apple a little changed the variety of colors on the new iPhone XR. On the generation of 2019, there would be two new colors, with green and lavender, and blue and coral would come out of the catalog.
Mark Gurman, journalist of Bloomberg often very knowledgeable, come along from the water to the mill of rumors. Instead of pieces of glass, that's equivalent to the new colors for the iPhone XR. In addition to black, white and yellow, there are green and glass that would go to the iPhone XR lavender. The colors are boring, but that doesn't mean much: on the iPhone, the material given under the glass necessarily contributes to the final rendering.