Arctic Fox Semi-Permanent Periwinkle Hair Dye This hair dye is the perfect shade of lavender blue (dilly dilly)! Periwinkle from Arctic Fox gives you a pastel shade without the fuss and muss of mixing or diluting colors. Perf! Plus, it's a cruelty-free, semi-permanent hair dye that is made only from vegan ingredients, with added conditioner to make your hair soft and smooth! So if your dilly dilly heart wants some dilly dilly hair, Periwinkle is the best choice for you!