Several Chinese smartphone manufacturers are now offering models that can change color depending on their exposure to light. The latest example is the Realme 9 Pro and 9 Pro+, the back of which can turn from blue to red depending on the ambient light. And so it seems that the latest trend in smartphones is for automatic color changes. At Realme, this new technology is called Light Shift and is, for now, only available on the new Realme 9 Pro and 9 Pro+. The back of the handsets change from blue to red when exposed to sunlight, and in a matter of seconds. As soon as it is no longer exposed to l…