FACTION8 uses level-dash-reflect: 7-1 = medium ash blonde.
- Level (1-10, plus 11 High Lift): depth, from black to high lift.
- Reflect: -0 natural, -00 double natural (100% white hair), -03 natural gold, -1 ash, -2 violet, -3 gold, -34 gold copper, -4 copper, -5 red violet, -6 red, -7 matte, -8 brown.
- Doubled digit = same family, intensified: 6-66 is the level-6 red with a double pigment dose (same for -22, -44, -55).
Official technical note: the naturals (-00, -0, -03) are cool-based. The -11/-22/-44 boosters are level-less intensifier additives — they do not count as shades.