Yes, RUBELLA Metallic Hair Color is a permanent hair dye. It works through an oxidative process, which means the color pigments develop inside the hair shaft during the coloring process. This is different from temporary or semi-permanent products that only coat the outside of the hair and wash out after a few shampoos. Because the pigment is inside the hair, the color lasts much longer.
That said, even permanent dyes fade over time, especially fashion shades like pink. The metallic pink will gradually lose intensity with each wash, and you may notice it becoming softer or more pastel before it fades completely. How long it lasts depends on your hair's porosity, how often you wash, and the products you use. Using sulfate-free shampoos and washing in cooler water can help the color stay vibrant longer.
Unlike a temporary color, this dye will not wash out in a few days. It will stay until your hair grows out or you cut it off, though the shade will fade. If you are not ready for a long-term commitment, a temporary or semi-permanent pink might be a better choice. But if you want a color that lasts and covers grey, this is the type of product to use.