There are a few ways to change the color of a dress in Photoshop. One way is to use the “Color Picker.” To use the “Color Picker,” select the color you want to change and then click on the “Change Color” button. Another way is to use the " Hue/Saturation" tool. To use the " Hue/Saturation" tool, select the color you want to change and then click on the “Change Color” button.