"Grayscale mode" refers to a setting on electronic devices that displays images or content without using colors. It only uses shades of gray, making everything black, white, or different shades of gray. Full definition
If i could see this in a store and compare it to a Samsung Galaxy Tab S / S2 in Grayscale mode that would be great. (blog.the-ebook-reader.com)
I have found using the black background pdf readers with grayscale mode on super amoled screens to cut down eye fatigue a lot. (blog.the-ebook-reader.com)
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. (android.gadgethacks.com)