If you want to change the colors of a photo on your iPhone, there are a few steps you can take. First, open the photo in your photo editor or camera app. Then, use one of the following methods to invert the colors:

  1. Choose Edit > Invert Colors. This will invert all of the colors in the photo, making it black and white.
  2. Drag and drop a color from the color palette into an empty space in the Inverted Colors field. Then, press OK to save your changes.