Which design element refers to the contrast of dark and light?

the element is the degree of light and dark in a design. It is the contrast between black, white and all the tones in between. Value can be used with color as well as black and white.

Explanation:

pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."