Yellow uses a dot between level and reflect: 7.66 = medium intense red blonde.
- Level (1-10, plus 11 High Lift): depth, from black to platinum blonde.
- Reflect: .1 ash (blue base), .2 iridescent (violet), .3 gold, .4 copper, .5 mahogany, .6 red, .7 matte (green).
- Repeated digit = very intense reflect (7.66); a trailing S means super intense (5.66S); a leading 0 before the reflect desaturates it (10.01).
The natural series split into Rich Natural (1-10), Intense Natural (5.00-9.00, extra-full effect) and Rich Cool Natural (4-9 Cool, blue base for cool results).