Both Uses of

contrast
in
Dracula

Two were dark, and had high aquiline noses, like the Count, and great dark, piercing eyes, that seemed to be almost red when contrasted with the pale yellow moon.
p. 44.9 *

contrasted = compared to show differences (in this case, because they are close to each other)

His waxen hue became greenish-yellow by the contrast of his burning eyes, and the red scar on the forehead showed on the pallid skin like a palpitating wound.
p. 326.4

contrast = 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