What it is:
Schwarzkopf Professional Fibre Clinix Purple Vibrancy Neutralising Booster

What it does:
Formulated with AHA for enhanced colour vibrancy, Fibre Clinix Vibrancy Blue Booster contains a special blend of purple and blue pigments that help to neutralise unwanted orange undertones in medium to light blonde hair.

What else you need to know:
You cannot mix blue and purple boosters.