Costas Hummingbird by Ard As Nails is a blue to magenta thermal flake nail polish. Opaque in 2-3 coats. This polish is a purple/blue when warm (dependant on skin tone and light) and transitioning to a magenta when cold. This contains irridescent flakes.

*Please note that thermal pigments have a limited shelf life. Eventually the transitioning effect is likely to cease. In order to help your bottle transition for as long as possible, keep it well sealed in a cool environment and out of direct sunlight and away from heat. But most importantly, wear it often!