Apple Final Cut Pro 7 - Manual (Page 1389)

Because the picture was tinted into the blues, when you click the eyedropper in part of
the white bedspread, the color balance indicator moves into a mixture of red and yellow
to turn the whites of the image into true white.
The color balance
indicator moves to
correct the whites.
You can see the correction in the Canvas.
After color correction Before color correction
Note: When using the Auto-Balance eyedropper, it’s important to recognize that the color
temperature of the light illuminating the white area you select will affect the hue of the
compensation that is made. For example, if the picture is lit with a combination of daylight
and tungsten sources, selecting a part of the picture illuminated by daylight will result
in compensating the overall color temperature of the image by adding more reds, whereas
selecting a part of the picture illuminated by tungsten will result in adding more blues.
In such a case, you need to simply pick the best possible compromise that looks right to
you.
1389 Chapter 82 Color Correction Examples