Make Colors on the Pixel 2 XL Look Amazing

The P-OLED screen in the Pixel 2 XL looks good but not as good as what you'd expect from an OLED-type display.  Here's how to fix that.  Believe it or not, a quick settings change will make your phone's display look beautiful!

Prerequisites

• For this specific guide, we'll be using ADB so make sure you have it installed (download Platform-Tools package here).  You can also use a terminal emulator on your phone but we're not covering that at this time.
• Must be rooted
• USB debugging must be enabled

Instructions

1. Connect your Pixel 2 XL to your computer over USB
2. In a command prompt (Windows) or terminal (*nix, macOS), run:

   adb shell

3. Become root:

   taimen> su

4. Copy build.prop to your internal storage:

   taimen> cp /system/vendor/build.prop /sdcard/build.prop

5. Open /sdcard/build.prop for editing:

   taimen> vi /sdcard/build.prop

6. Replace persist.sys.sf.color_saturation=1.1 with persist.sys.sf.color_saturation=1.5
7. Mount /vendor as read/write:

   taimen> mount -o rw,remount /vendor

8. Copy your new build.prop back to /system/vendor:

   taimen> cp /sdcard/build.prop /system/vendor/build.prop

9. Reboot your phone

Once the phone has booted, you should see an extreme difference in quality.  Colors will appear much more vibrant.