All 3 Uses of

contrast

in

To Kill a Mockingbird

...he had thought that up to make me understand he wasn't afraid of Radleys in any shape or form, to contrast his own fearless heroism with my cowardice.
p. 43.3 *

contrast = point to the difference between

As Atticus's fists went to his hips, so did Jem's, and as they faced each other I could see little resemblance between them: Jem's soft brown hair and eyes, his oval face and snug-fitting ears were our mother's, contrasting oddly with Atticus's graying black hair and square-cut features, but they were somehow alike.
p. 173.2 *

contrasting = drawing attention to an unmissable difference when seen side-by-side

Mr. Cunningham wore no hat, and the top half of his forehead was white in contrast to his sunscorched face, which led me to believe that he wore one most days.
p. 174.2

in contrast = in a comparison that shows differences

Definitions:

(1) (contrast as in: contrast their writing styles)
point to differences between; or compare to show differences
(2) (contrast as in: there is a contrast)
a difference -- especially a notable difference; or the side-x-side arrangement of things that draws attention to an unmissable difference
(3) (contrast as in: sharpen the picture contrast)
the difference between tones of an image -- as in a photo or video -- such as the quality of brightness or the intensity of shades or colors
(4) (meaning too rare to warrant focus)