If you want to colorize an image in Photoshop, there are a few things you need to know. First, open the image you want to colorize in Photoshop. Next, select the Color Range tool (CMD+8) and click on the midpoint of the histogram. This will select all of the colors in the image. Next, use the Color Picker tool (CMD+7) to select any colors you want to add to your image. Finally, use the Opacity slider (CMD+9) to adjust how much of each color is visible in your image. ..