Highlights: what they are, techniques, and how to maintain them

Hair highlights remain one of the most requested coloring techniques in professional salons because they brighten the hair without completely changing the base color. Doing them well is only half the battle: proper maintenance makes all the difference. Correctly executed lightening enhances the cut, movement, and complexion, while improper care leads to dryness, dull tones, and sensitized lengths.

What are highlights

The term highlights refers to selected strands of hair that are lightened compared to the natural or cosmetic base color. Unlike a uniform color, the work is localized and serves to create contrast, light, and depth. The final effect can be very noticeable or soft, depending on the thickness of the strand, the level of lightening, the starting base color, and subsequent toning.

There isn't just one version: they can be thin and diffused for a natural result, or more pronounced to create a greater visual impact. On brown bases, the goal is often to achieve honey, hazelnut, or caramel tones. On blonde bases, the focus is on maintaining luminosity and a clean tone, preventing yellowness.

Difference between highlights, sun-kissed highlights, and balayage

This is where much of the confusion arises. Highlights do not always coincide with sun-kissed highlights and are not the same as balayage.

Sun-kissed highlights aim for a more delicate and diffused effect, as if the hair had been naturally lightened by the sun. Highlights can be more structured and visible. Balayage, on the other hand, is a freehand technique that concentrates light on strategic points, with more gradual and less regular blending compared to a classic foil application.

The choice depends on the objective: if you want definition and contrast, highlights are very effective. If you prefer softer, less noticeable regrowth, balayage can be more practical. There isn't one technique that is absolutely better: what matters is the desired result and the condition of the hair being worked on.

Who suits highlights best

They work well on many hair colors, but not in the same way on all. On fine hair, they immediately create a visual effect of greater dimension, as the play of light makes the hair appear fuller. On thick or very dark hair, they require more careful planning: lightening too much or without adequate toning can create excessive contrasts.

Texture also matters: on wavy and curly hair, light is distributed differently than on compact straight hair, so the placement of the strands must follow the natural movement. A decisive aspect is maintenance: if you don't want to constantly worry about the tone or regrowth, it's better to ask for a less defined effect.

Maintenance: the critical point

Highlighted lengths are, to all intents and purposes, treated hair. Even when the result appears natural, the hair fiber has undergone a lightening process that makes it more porous, dry, or reactive to heat. The post-service routine is not a minor detail: it is part of the result.

Shampoo for highlighted hair

The first step is to use shampoos designed for colored or sensitized hair. A good professional shampoo cleanses without stripping the color and without drying out the lengths. Among the most effective options are Joico K-PAK Color Therapy for colored and sensitized hair, or Matrix Color Obsessed, excellent for preserving color vibrancy wash after wash.

If highlights tend to yellow, an anti-yellow shampoo used once a week helps maintain a cool and clean tone. Kérastase Blond Absolu Bain Ultra-Violet is one of the most popular for blonde and platinum highlights, while Joico Blonde Life Violet is a valid alternative with excellent value for money.

Mask and treatments

The second point is treatment. Nourishing masks, acidic conditioners, and leave-in products with a disciplining action serve to seal the cuticle, improve combability, and maintain shine. When highlights begin to look dull, the problem is often not the color itself, but the fiber that has lost its compactness.

For blonde and lightened hair, Schwarzkopf Blondme All Blondes Rich is a specific mask that deeply nourishes without weighing down the hair. A very effective alternative is L'Oréal Blondifier, which brightens and strengthens lightened hair fibers.

Heat and styling: the most common mistakes

Flat irons, blow dryers, and curling irons can quickly alter the result if used without protection. Excessive heat accentuates porosity and dehydration, making highlights duller and less uniform. A professional heat protectant is not an extra: it is a technical foundation of the routine.

GHD Bodyguard Heat Protect Spray is one of the most reliable for treated and lightened hair, with protection up to 230°C. Alternatively, Wella EIMI Thermal Image offers light protection and doesn't weigh down the hair fiber.

Also, pay attention to brushing: on lightened hair, aggressive brushing increases breakage and frizz, especially at the ends. Another common mistake is using any pigmented product to revive blonde hair. On beige, honey, or caramel highlights, an overly cool pigment can dull the result and alter the color scheme.

When to get them redone

Highlights are not redone at a standard frequency that applies to everyone. It depends on the technique, the contrast with the base, and the growth rate. On average, a refresh can be considered every 8-12 weeks, but rushing is not always the best choice.

If the lengths are already stressed, it makes more sense to work on toning, a reconstructive treatment, and a maintenance cut before repeating a lightening service. This is what truly makes the difference between luminous blonde hair and hair that quickly loses its quality.

Professional products for highlights on Planethair

On Planethair, you'll find a selection of professional products to maintain your highlights with salon-quality standards at home, choosing the routine based on color, structure, and level of sensitization. Planethair has been online since 2000 — the first Italian e-commerce specializing in salon brands — with over 25 years of experience and dedicated assistance to help you choose the right products for your color routine.