Does Permanent Blue Hair Dye Fade?
Yes, permanent blue hair dye will eventually fade over time. However, it will not fade as quickly as semi-permanent or temporary blue hair dye. How long it takes for the color to fade will depend on factors such as the hair’s porosity, how often it is washed, exposure to the sun, and the quality of the dye. Some blue hair dyes may also fade to a greenish tint instead of completely fading away.