The Difference Between Darks/lights in an Image

This page is the CodyCross answer for the clue below from World of Books, Group 297, Puzzle 4 (Publishing Company).

Question is: The Difference Between Darks/lights in an Image

and the answer is: CONTRAST

Word Meaning:

CONTRAST — (countable) A difference in lightness, brightness or hue between two colours that makes them more or less distinguishable.

Definitions from Wiktionary.

The difference between darks/lights in an image — CodyCross Answer | CodyCross Solutions