Color Correction and Restoration - Beginning Photo Retouching and Restoration Using GIMP - page 85

Figure 4-9. Taking a color sample from the wall

4. Open the Filter Pack Simulation option (Image Menu ➤ Colors ➤ Filter Pack).

This function simulates the use of colored filter gels. Click the Hue option, and
the Hue Variations window will open (Figure 4-10 ).

Figure 4-10. Hue Variations is a good way to correct color casts

5. As does a color ring, Hue Variations show the opposite of a particular color

directly across from it. Because this photo has a blue color cast, we have to click
on the opposite color, which would be yellow, to counteract the excess blue.