Color Charm uses LEVEL + LETTERS: 8A = level 8, ash reflect (Light Ash Blonde).
- Level (1-12): depth, from black to high lift.
- Letters: N natural, A ash, G gold, W warm, R red, V violet in combos.
- Doubled letters: NN = intense natural (gray coverage), AA = intense ash.
- Combos: NW natural warm, NG beige, RG copper (red-gold), RV red-violet, WV warm-violet.
Quick equivalence with Wella's European slash numbering: A ≈ /1 (ash), G ≈ /3 (gold), R ≈ /4 (red), RG ≈ /43 (red gold). The converter does that translation for you.