Apple Aperture 3.5 - Manual (Page 277)

Chapter 7 Make image adjustments 277
You use the Black Tint eyedropper to remove color casts from the shadows in your images.
Before Black Tint adjustment After Black Tint adjustment
You use the Gray Tint eyedropper to remove color casts from the midtones in your images.
Before Gray Tint adjustment After Gray Tint adjustment
You use the White Tint eyedropper to remove color casts from the highlights in your images.
Before White Tint adjustment After White Tint adjustment
Note: Whereas using the White Balance controls adjusts the tints of all tonal values in the image
uniformly, the Black Tint, Gray Tint, and White Tint eyedropper tools allow you to selectively
neutralize color casts that affect only the shadows, midtones, or highlights. In some difficult
cases, you can use the Black Tint, Gray Tint, and White Tint eyedropper tools in combination with
the White Balance controls to first neutralize a tint in a specific tonal range and then uniformly
remove the tint from the rest of the image. For more information about adjusting white balance,
see
White balance an image on page 266.
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