More ideas from Millabell
This is actually a much cooler effect (in my opinion) than a sponge gradient look. This is also SO MUCH easier than the sponge gradient! Just select five colors in the same color scheme and paint your thumb the lightest and your pinkie the darkest. Fill in the other nails with colors in between.

OPI Italian Love Affair, OPI Feelin Hot Hot Hot, OPI Dim Sum Plum, OPI Louvre Me Louvre Me Not - Love the ombre look and love that they told you the colors! Make's it so much easier for me being a layman and all.