I am pretty much done with my lock screen, but I would like to fix one thing. In the lockscreen, the field that hides the 4 numbers that you use to unlock the phone isn't visible because it blends in with the black. It's hard to explain, but the photo attached should make it easier to understand. You can only see one of the 4 numbers, and it is circled in red. Which file do I need to edit so I can change the color of the entered passcode?