All 4 Uses of

contrast
in
City of Bones

Jocelyn even had a graceful way of walking that made people turn their heads to watch her go by. Clary, by contrast, was always tripping over her feet.
Chpt 2 *

by contrast = in a comparison that shows differences

He touched the photograph with a scarred and weathered hand—a strange contrast to the neat spotlessness of his tweed cuffs.
Chpt 11

contrast = something notably different compared (to something)

The late afternoon light came in through the curtains and made his face a study in contrasts.
Chpt 11 *

contrasts = differences in shading

Clary noted the contrast: the ravaged face of the older man and the boy's unlined one, the pale locks of hair falling into Jace's eyes making him look even younger.
Chpt 19 *

contrast = notable difference

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