| Skin is never just one color. What really works is sampling an entire range from highlight to shadow. A series of swatches generated from each of these samples can be the basis of a gradient map which can then be customized to the detail profile of the target image. You'll need a good mask for the skin areas.
If the tones are close to begin with, you can compare two similarly lit areas and simply take the numbers from one and use a curve to transfer the other. If the cheek of the reference image comes out to read R:235 G:176 B:142, and a similar area on the target image reads R:194 G:137 B:100, simply apply a curve to the target, add midpoints and enter the input values from the target image and the output values from the reference. This way you won't simply be overlaying a single hue onto your image; the curves will distribute the shift proportionally through areas lighter and darker than your sample area.
If the differences are too extreme, then I would say that the Gradient map is the way to go. It's the Atomic Bomb of color changes. |