3.4

Chapter 16 Making Image Adjustments 333
Adjusting White Balance Manually
You can manually adjust an image’s white balance using the Warmth, Temp, and Tint
parameter controls.
You use the Warmth and Temp parameter controls to adjust the image’s color temperature. Color
temperature is a term used to describe the color of light when the image was shot. However,
it refers to the color value of the light rather than its heat value. Light’s color temperature is
measured in units called kelvin (K). Adjusting the color temperature of the image changes how
Aperture interprets the colors in the image in relation to the assigned temperature of light.
The purpose of adjusting the color temperature of an image is to make colors look as natural
as possible.
You can also manually adjust the tint of an image using the Tint parameter controls. You use
the Tint parameter controls when you need to ne-tune the white balance adjustment by
neutralizing the remaining green or magenta tint.
Note: The Warmth and Temp parameter controls adjust the image’s color temperature in the
same way except that Aperture does not display the Warmth values in kelvin (K) units.
To manually adjust the color temperature of an image
1 Select a photo.
2 In the White Balance area of the Adjustments inspector or the Adjustments pane of the Inspector
HUD, choose the method Aperture uses to adjust the image’s white balance from the White
Balance pop-up menu.
Choose how you want to adjust
the image’s white balance from
this pop-up menu.
•
To adjust the image’s white balance based on natural gray: Choose Natural Gray.
•
To adjust the image’s white balance based on a skin tone: Choose Skin Tone.
•
To adjust the image’s white balance based on color temperature (in degrees kelvin) and tint:
Choose Temperature & Tint.