To form a contrast.
To set in opposition in order to show the difference or differences between.
Something that is opposite of or strikingly different from something else.
A control on a television, etc, that adjusts the amount of contrast in the images being displayed.
Antithesis.
is a substance used to increase the contrast of structures or fluids within the body in medical imaging.
The degree of this difference.
A difference between two objects, people or concepts.