Ombre nails with an eyeshadow brush. Paint your nails with your base color, then apply the eye shadow and finish with a thick clear top coat to lock everything in! The eyeshadow and eyeshadow brush is such a cool technique to use!
This looks like a fun Christmas accent nail, red with one candy-cane stripe. I also love the varied, more sophisticated striped candy look rather than the traditional straight, same-thickness, candy-cane stripes.