Apple Color 1.0 - Manual (Page 201)

Chapter 9 Primary In 201
Basic Tab
The Basic tab contains the controls for saturation, as well as master lift, gamma, and gain
parameters that let you make additional adjustments to the contrast of your image.
Saturation Controls
Saturation describes the intensity of the color in an image. Image saturation is
controlled using three parameters which, similarly to the other controls in the Primary
In room, let you make individual adjustments to different tonal zones of an image. Like
the contrast and color controls, tonality specific saturation adjustments fall off gently at
the edges of each correction to ensure smooth transitions.
What Is Color Contrast?
Contrast in this document usually describes the differences between light and dark
tones in the image. There is another way to describe contrast, however, and that is
the contrast between different colors in an image. Color contrast is a complex topic,
touching upon hue, color temperature, lightness, and saturation. To greatly simplify
this diverse topic, color contrast can pragmatically refer to the difference in color that
exists in different regions of the image.
In the previous example, the image started out with an indiscriminate color cast; in
other words, there was red in the shadows, red in the midtones, and red in the
highlights, so there weren’t many clearly contrasting colors in the different areas of
the image. By removing this color cast from some parts of the image, and leaving it in
others, you enhanced the color contrast between the main subject and the
background. In images for which this is appropriate, color contrast can add visual
sophistication to an otherwise flat image.