There are a few reasons why your Photoshop image might be grey. One reason is that the image has been processed too much in the past. If you have used a lot of white balance, saturation, and brightness adjustments, then your image may be looking grey because of it. Another reason is that you may have used a photo editor that doesn’t support color correction. This means that some of the colors in your image may not have been properly balanced and may look grey.