All 4 Uses of

contrast
in
Life of Pi

The dialogue zips along, crackling with tension. The descriptions burst with colour, contrast and telling detail.
Chpt A.N.

contrast = difference

The contrast between its purple bracts and the red flowers of the tree was very pretty.
Chpt 25-28

contrast = notable difference

The weird contrast between the bright, striped, living orange of his coat and the inert white of the boat's hull was incredibly compelling.
Chpt 53-56 *

Worse, there was the contrast between the frantic activity of the poor sailor and the gentle repose of his leg at the bottom of the boat.
Chpt 97-100

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