Want to recolor someone's hair? Their eyes? Their lipstick? Their clothes? Well this is for you then.
As you can see above, I have (very sloppy) recolored Erica's hair, eyes, and lipstick and Malia's eyes in the bottom part. Here's how you do it.
i. Open up screencap/image in superimpose. Open a color of your choice as the foreground.
ii. Move the colored image as desired and go to transform. You can use whichever layer type you think looks best, but for mine above I had used hue.
iii. Go to mask and get your paint brush tool ready. You'll have to mask around the unwanted areas (it takes time so be patient) but after that just merge and save or repeat if you're doing more colorings.
This actually is really easy to do and fun but is time consuming. I've used it a couple of times on eye color for my covers and to change the color of their clothes as well. It's very useful in making the colors in your edit/cover all look pleasing to the eye!