iPhone Replacement Display Color/Hue/Brightness Discrepancy
iFixit Australia — iPhone Display Color Troubleshooting
Color, hue, and brightness can vary from screen to screen. As it turns out, Apple provides a full suite of display customization options as an accessibility option within iOS. This tool allows you to calibrate your display's color settings and more to the user's preference.
You can read more about each of these settings and how to access them here:
Using this accessibility tool should enable you to adjust your display so that is more in line with what you consider to be a "normal" looking screen, but if you're unable to reach the desired outcome after making adjustments then please let us know along with photos of the issue so we can assess you for a warranty replacement.
To exercise your iFixit warranty, please contact