3.4

Chapter 16 Making Image Adjustments 344
Setting the Tint of Black, Gray, and White Values in the Image
You use the Black Tint, Gray Tint, and White Tint color wheels when you want to selectively
remove color casts from the shadows, midtones, and highlights in the image. Color casts
are often caused by shooting in mixed lighting and unnatural lighting situations, where the
dierence in the color from the mixture of multiple types of source lights can produce a color
variance in a specic tonal range in an image. For example, when shooting indoors, interior
incandescent (tungsten) lighting can often produce a yellow color cast through the white colors
in the image. Using the White Tint eyedropper, you can have Aperture isolate the highlights and
add blue to the white values, thereby reducing the yellow color cast and returning the whites to
neutral white.
There are two methods for selectively adjusting the tint values in an image: you can use the
Black Tint, Gray Tint, and White Tint eyedroppers to have Aperture automatically adjust the tint
to neutral color values, or you can use the Black Tint, Gray Tint, and White Tint color wheels to
manually adjust the tint values. The method you choose is determined by the level of precision
you require. The eyedroppers provide an accurate means of identifying the color cast within the
tonal range of each eyedropper and returning the color values to neutral. However, depending
on the subject, you may not want to completely remove the color cast found in a specic
tonal range. Therefore, you can manually adjust the tint values in the shadows, midtones, and
highlights using the Black Tint, Gray Tint, and White Tint color wheels.
For more information about using the eyedroppers to adjust the black, gray, and white tints in
the image, see Using the Eyedroppers to Set the Tint in an Image on page 344.
For more information about manually adjusting the black, gray, and white tints in the image, see
Manually Setting the Tint in an Image on page 349.
Using the Eyedroppers to Set the Tint in an Image
You use the Black Tint, Gray Tint, and White Tint eyedropper tools when you want to have
Aperture selectively modify the tints of the shadows, midtones, and highlights in an image
automatically.
You use the Black Tint eyedropper to remove color casts from the shadows in your images.
Before Black Tint adjustment After Black Tint adjustment