The bright red car provided a stark contrast to the dull gray building.

the state of being strikingly different from something else in juxtaposition or close association
The contrast was very clear.
See the contrast between them.
This is a strong contrast.
stark contrast
sharp contrast
visual contrast
difference
disparity
variation
The bright red apple contrasts sharply with the dark green leaves.

To show differences when compared to something else.
The colors contrast nicely.
His ideas contrast with mine.
The old and new buildings contrast.
contrast sharply
contrast with
contrast greatly
differ
distinguish
vary
The artist chose to contrast the dark background with bright colors.

To compare in such a way as to emphasize differences.
The two ideas contrast sharply.
Her quiet nature contrasts with his loud one.
We will contrast the old methods with new ones.
contrast sharply
contrast with
contrast the differences
differentiate
distinguish
oppose