Paint nails black (use the shiny bottle in YSL Manucure Couture Duo N°6, 1,950), and let them dry. A third of the way up each nail, run a glittery blue hue (like Sally Hansen Xtreme Wear Nail Colour in Blue It, 695) to the tip, and let dry. On the top third, apply a gold one (like Estée Lauder Pure Color Nail Lacquer in Metallic Sage,
1,260), says nail pro Lisa Logan, who created this mani.
Press acetone onto tips for a minute to loosen layers.