How to do it: Pick 2 colors you're into. Apply a basecoat of one color to your nails and let dry. Next, use your second color to add shapes you like—angles, a stripe—you do you. Don't be worried about going freehand; we're going to add a little extra oomph with our next step, so these don't have to be perfect. After the second color is dry, pour some black polish in a small bowl and, using a special brush, unleash your inner art-school student by painting lines, dots, zigzags, and more on your nails. After that dries, apply a clear topcoat to seal it all in!