Losing vibrancy is another challenge with adding highlights to dark tones. "Black hair reflects the light best, and over time, you will lose some of that gorgeous shine," explains Michael.

like the blue-on-black mix seen here. Icy-blue hair to match those ~ocean eyes~? Yes, pls. Just know that a light-blue shade like Billie’s will fade fast, so try to limit the number of times you ...

Ultimately, the end result might involve some deep, blue-based highlights if you already have nearly black hair to begin with. Or, if you have dark brown hair, a permanent blue-black color can be ...