There are a few ways to remove all of one color in Photoshop. The first way is to use the eyedropper tool. To remove all of the red color, click on the red eye icon and then drag the cursor over the entire image. The second way is to use the color filter tool. To remove all of the green color, click on the green eye icon and then drag the cursor over the entire image. The third way is to use a layer mask. To remove all of the blue color, click on the blue eye icon and then drag the cursor over the entire image.
