Final answer:
Grayscale is a scale of achromatic colors with equal gradations ranging from white to black.
Step-by-step explanation:
A scale of achromatic colors having several, usually ten, equal gradations ranging from white to black is called Grayscale. Grayscale is a range of shades of gray without any color. It is commonly used in digital imaging and computing to display images in black and white or shades of gray.