There are a few ways to remove one color from an image in Photoshop. The first way is to use the eyedropper tool. To remove blue from an image, for example, you would use the following command: Eyedropper Tool > Blue The second way is to use the Hue and Saturation tool. To remove green from an image, for example, you would use the following command: Hue & Saturation > Green
