There are a lot of ways to choose one color in Photoshop. You can use the color wheel, or you can use the eyedropper tool. You can also use the Hue/Saturation slider. The Hue/Saturation slider is a great way to change the color of a selection. The following example shows how to use the Hue/Saturation slider to change the color of a blue selection: To change the color of a blue selection, use the Hue/Saturation slider to adjust the value from 0 (light blue) to 255 (dark blue).