Apple Aperture 2 - Manual (Page 445)

Chapter 15 Making Image Adjustments 445
III
Working with the Color Controls
You use the Color controls to selectively adjust the red, green, blue, cyan, magenta, and
yellow colors in an image using the Color controls in the Adjustments inspector or the
Adjustments pane of the Inspector HUD. Each color has individual Hue, Saturation, and
Luminance controls. If you need to adjust the hue, saturation, and luminance of a color
that does not appear in the Color controls, you can use the Color eyedropper to
identify a hue in the image that needs adjusting.
Although segmenting control of hue, saturation, and luminance on a per-color basis
may seem complicated at first, restricting these adjustments to specific colors helps
correct and enhance targeted colors without affecting others. In addition, Aperture
provides a Range control used to set the extent of colors affected by the Hue,
Saturation, and Luminance adjustments, also known as chromatic spread. You use the
Range control to fine-tune your color adjustments.
Before Color adjustment After Color adjustment
(adjusted the hue and saturation
of blue)