4. Mint and Coral
(shown above: Essie in "Turquoise & Caicos" and "Tart Deco")
I love this combo because it is sweet and delicate, much like Spring. Because they are both lighter colors, you can mix it up! Use more soft, pastel versions for Spring, and switch to vibrant, bold versions for Summer! These two colors complement each other very well and are still very popular. If you haven't tried this one yet, what are you waiting for?