Shadows often display strong blue casts that become even more obvious when printed. Daylight photos are generally lit by two main light sources:
Shadows are lit mainly by light reflected from the sky and therefore have a blue tint.
Figure 8-43 shows a detail of a photo with a pronounced blue cast. We correct the cast using the following steps:
We create a new Hue/Saturation adjustment layer.
In the Color Range menu, we select Blues and click on the sky using the eyedropper. We then make sure that we have corrected the appropriate colors by temporarily increasing Saturation to 100%.
The preview in Figure 8-44 shows that only the shadows are affected by our adjustment. If necessary, ...