For anyone with blonde, highlighted, bleached or platinum hair whose colour drifts towards yellow or orange between salon visits, including natural blondes. It also suits lightened hair that has become dry or fragile from bleaching. It is a home-use rinse-out mask, simple to fit into a weekly wash routine.

Purple masks often trade condition for toning, leaving bleached hair squeaky and stiff. This one carries its violet pigment in a hyaluronic acid conditioning base, so a single weekly treatment both cools the brass and puts moisture back into lightened lengths. It is a practical choice if your blonde turns warm between appointments and also feels dry.

• Shampoo, ideally with a purple or blonde shampoo, and towel-dry.
• Apply evenly through damp hair, paying attention to the brassiest sections.
• Leave on for 3 to 5 minutes; use the shorter time on very light or porous hair.
• Rinse thoroughly.
• Use once a week to maintain the tone.

Pros

• Tones and deep-conditions in one step, instead of a purple product followed by a separate mask
• Hyaluronic acid targets the dryness that comes with bleaching
• Short 3 to 5 minute processing time
• Sulfate-free and paraben-free per the brand

Cons

• Purple pigment is meant for blonde and lightened hair; it does nothing useful on brunette shades
• Very pale or porous ends can pick up a violet cast if left on too long, so start at the shorter time
• No full ingredient list published by the brand