For this one, I changed the color of the stars in the neckalce from black to purple. I think this looks good cause the background has a greeny yellow color to it and the twp colors are complementry.

I Edited this photo to black & white and then changed to color of my nails using different layers.

I edited this photo to make it into a triad with the colors blue, green and red. They all pop out alot and create a vibrant and happy mood.