Before 
After
This Youtube tutorial was a short video on how to simply adjust skin tones. The example was an image of a woman that was very unsaturated. Using the curves adjustment layer and the color picker, the instructor was able to change the woman’s skin tone to a warmer color in one step. When practicing, I also used an image of a woman but rather than making a cool skin tone warmer, I changed the color of a woman’s skin and the rest of the image. This technique does not stop at skin tones. I could see myself applying this technique to an entire or just a small space of an image.