Chiaroscuro
The word chiaroscuro is Italian for light and shadow.
Chiaroscuro in art, is the use of strong contrasts between light and dark regardless of any other color.
It refers to the use of light and shadow to create the illusion of light from a specific source shining on the figures and objects in the painting.
It's one of the classic techniques used in the works of artists like Rembrandt, da Vinci, and Caravaggio.
Cover the middle with your finger and tell me what you see😀