AGEbeautiful uses level + letters, no separator: 5N = medium natural brown.
- Level (1-10): depth, from black to very light blonde.
- Letters: N neutral, A ash, G gold, B blue, V violet/plum, R red, WB warm beige, RC red copper (Strawberry), RM red mahogany, RB raspberry.
- Double letters = intensified: NN intense neutral (extra coverage), AA double ash, RR intense red.
Official gray rule: on hair with more than 50% gray, mix B, V, R and RR shades with equal parts of the N shade of the same level to secure coverage.