Operation Manual

EffectBlue adjustment
Adds blue to the highlights, removing yellow.Move White Levels slider left
Working with the Color Controls
You use the Color adjustment controls to selectively adjust the red, green, blue, cyan,
magenta, and yellow colors in an image. 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
Range controls used to set the extent of colors affected by the Hue, Saturation, and
Luminance adjustments. The extent of colors affected by these adjustments is also known
as chromatic spread. You use the Range controls to fine-tune your color adjustments.
Before Color adjustment
After Color adjustment
(adjusted the hue and saturation
of blue)
You can also brush the Color adjustment on selected parts of an image. For more
information, see Making Brushed Adjustments.
565Chapter 17 Making Image Adjustments