Cover Fusion uses level + double letters: the first is always N (natural coverage base) and the second is the reflect: 6NA = dark blonde natural ash.
- Level (2-9): color depth.
- Families: NN pure natural (maximum coverage), NA ash, NABn ash brown, NCh chocolate, NG gold (plus NGb beige, NGc copper, NGi iridescent), NBr brown red, NBc brown copper, NCr copper red.
The double natural base is what sets it apart from Color Fusion: every shade is built for gray, not adapted to it.