How to Enable the Hidden Grayscale Mode on Your Pixel or Nexus — No Root Needed
Most newer phones come with a grayscale mode that you can activate when you want to save some battery life. The way it works is simple: If your graphics chip only has to render elements in black and white instead of full 32-bit color, it won’t consume as much power.
This option may not have the same power-saving benefits as a true grayscale mode option would, because it’s still unclear if it works at the GPU level or as an overlay. But there’s another advantage of turning your screen black and white: According to former Googler Tristan Harris, enabling grayscale mode can help cure your smartphone addiction by making the screen less appealing.
So if you’d like to try it out to see if it helps with battery life, or if you’re starting to think your smartphone usage is getting out of hand, I’ll show you how to access and enable this hidden grayscale mode on your Pixel or Nexus device.
First up, you’ll need to enable the hidden “Developer Options” menu on your Pixel or Nexus. To do that, head to About phone in Settings, then scroll down and tap the “Build number” entry seven times in rapid succession. If you do this right, you’ll see a toast message that says “You are now a developer!”
Next, head back to the main Settings menu, then scroll down and select the “Developer options” entry towards the bottom. From there, scroll down and find the Hardware accelerated rendering section, which is close to the bottom of this menu.
At the bottom of the Hardware accelerated rendering section (and just above the Media section), select the “Simulate color…