A grayscale screen refers to a display that only shows shades of gray instead of colors. It lacks the vibrant and colorful visuals typically seen on a regular screen. Full definition
Charts that use color in meaningful ways should include explanations where needed for readers with grayscale screens. (ebookflightdeck.com)
It supports four shades of gray, so illustrations don't look quite as good as they do on the 16 - grayscale screen of Amazon's device, but illustrations and artwork aren't the forte of any modern e-book device. (macworld.com)
You will have none of the potential layout or readability issues that you might encounter with trying to view them on a traditional e-ink grayscale screen. (hubpages.com)