add a little petroleum jelly around your fingers (keep it off your nails!), base coat your nails with the 'bottom' color, draw two stripes of color on a make up sponge and dab on your fingers to blend.
When you’ve got all the accessories, like rings and bracelets for the bling, sometimes you need to tone it down. It’s exactly what’s happening in this example. Just some nude matte on coffin nails and everything’s ten times better.