I'll show you how to change a color in your photo using Adobe Photoshop Elements, but if you use a different photo editing program, don't sweat it: The process is almost exactly the same in any modern program. That's because most photo editors feature a useful little gadget called the Color Replacement tool (though the name will vary from program to program).
The Color Replacement tool lets you paint over one color with a different color, and it relies on a tolerance adjustment to know which shades of that color to replace. With a little practice, you can wield the tool well enough that no one will suspect you changed someone's eye color from brown to blue, or painted your house a different color.
To get started, begin by opening a photo in Photoshop Elements. Then select the , which you can find in the toolbar on the left side of the screen, 17 cubbies from the top. It shares a space with some other brush tools and the pencil tool.