iPhoto is a program included with Macintosh computers. The software not only stores photos for viewing on the computer or mobile device, but also can be used to edit and modify images. You can change the hair colour of a person in a photo that has been copied to iPhoto, including making the hair green, using its built-in tools. The procedure is straightforward and does not require technical expertise.
Launch iPhoto by double-clicking its icon inside of the “Applications” folder.
Click on a folder in the left column. Select a headshot photo from the middle column of the program by double-clicking on it.
Click on the “Edit” icon at the bottom of the program’s screen. Select the “Adjust” icon that appears in a new toolbar at the bottom of the screen.
Click the “Avoid saturating the skin tones” checkbox in the pop-up window that appears to preserve the skin tones of the photo.
Move the “Tint” slider near the bottom of the pop-up window towards the right to change the colour of the hair to green. The farther to the right the slider is moved, the greener the hair becomes. Stop moving the slider when the intensity of the green in the hair suits you.
Click the “Paste” button at the bottom right of the window to lock in the green colour of the hair.
Close the pop-up window by clicking the “X” in the upper left corner. Click the “Done” button at the bottom of the toolbar. Quit the iPhoto program.
You can make a copy of a picture to change the hair colour on in case you want a backup copy to remain unmodified.