contrast
US /ˈkɑːn.træst/
UK /ˈkɑːn.træst/

1.
the state of being strikingly different from something else in close conjunction
:
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The white walls provided a stark contrast to the dark furniture.
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Her cheerful personality was a complete contrast to his gloomy mood.
2.
the amount of difference between the darkest and lightest parts of an image
:
•
Adjust the contrast on the screen to make the image clearer.
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The photographer increased the contrast to highlight the details.
1.
to compare in such a way as to emphasize differences
:
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You should contrast the two theories to see their strengths and weaknesses.
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The author often contrasts urban life with rural life in his novels.