Fear not, as it seems like nothing can hold back the XDA community from getting what they want. XDA Forum Member RyokoN successfully ported White Balance from the Japanese Xperia Z1 firmware to non-Japanese variants. The port seems to be working as it should overall according to feedback from the XDA community, but RyokoN does note that for changes to White Balance settings to take place, a reboot must take place afterwards. As expected, the port will only work with Xperia Z1 handsets running the new Android 4.3 Jelly Bean update from Sony, and comes in a simple zip file that’s to be flashed through a custom recovery.
So if you’ve been scratching your head and wondering where to find White Balance on your freshly updated XPeria Z1, head over to the original thread for more information on the port.