Wella Professionals organizes shades as level/reflect:
- Level (1-10): Color depth. 1 = black, 10 = lightest blonde.
- Primary reflect: First digit after the slash. /0 = natural, /1 = ash, /3 = gold, /4 = copper, /5 = mahogany, /6 = violet, /7 = brown.
- Secondary reflect: Second digit (optional). /43 = copper gold, /16 = ash violet.
Koleston Perfect ME+ is the permanent line: lifts and deposits, ideal for gray coverage and level changes. Color Touch is demi-permanent: deposits only, ideal for toning blondes and refreshing color.