2 Pull out the colors
Now extract colors with the eyedropper tool. Work from the biggest color (the one you see most of) to the smallest. For contrast, pick up dark, medium, and light pixels of each.
Work first on the big colors. These are the ones you see at a glance; her skin and hair colors and blue jacket. Then do the small colors—her eyes, lips, the highlights in her hair, and soft shadows. You can see in this image a light side and a shadow side; it’s subtle, but pay attention. Finish each area before moving on. Sort your results by color, then each color by value (light to dark). Discard lookalikes. You’ll be thrilled by what you find.