Blue butterfly:

Butterfly pattern ‌ : Paint a beautiful butterfly pattern on your nails. Choose black or another color that matches the base color to outline and detail the butterfly. Butterfly wings can use gradients or embellished sequins to add layer and shine ‌
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‌ Light and shadow ‌ : Simulate the flow and shine of the aurora by using clear or translucent nail polish and special shine enhancers. This effect allows nails to show a variety of beauty in different light angles ‌