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How To Use L'Oréal Paris Colorsonic for Your Best Hair Color at the Press of a Button

Salon-quality hair color is as easy as 1, 2, 3.
  • Leann Garofolo
May 15, 2024

At-home hair color technology seems to be more advanced than ever. Between balayage kits that can give you sunkissed strokes akin to a colorist’s and high-lift bleaches, dyeing your hair has never been more convenient. But it’s about to get even easier.

L’Oréal Paris recently debuted Colorsonic, a device that revolutionizes how you apply DIY hair dye. At the touch of a button, the first-of-its-kind device automatically mixes your dye, parts your hair, and evenly deposits color from root to tip for salon-worthy results. Ahead, we’re giving you a sneak peek at how to dye your hair with the innovative device, which launches exclusively online and in Target stores starting June 5, 2024. We’re also providing pointers on using at-home hair dye, plus maintenance tips that can help keep your new hue as vibrant as possible.

How To Dye Your Hair at Home With Colorsonic

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L’Oréal Paris spent more than 10 years developing the Colorsonic, which is the first device of its kind ever to hit the market (it has 29 patents to date, and was already named one of the top 100 inventions by TIME). The smart device brilliantly simplifies the process of dyeing your hair at home, eliminating the need to mix your own color or figure out how to apply it evenly. In the box, you’ll find the following:

  • Colorsonic wand

  • Instruction manual

  • Rubber gloves

  • Charger

  • Lengths adaptor

  • Color cleaning cartridge

With this lineup on hand, you can begin dyeing your hair. Three steps and five minutes are all it takes to get salon-quality results.

Step 1: Pick a color

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Like with any hair dye, you’ll have to select your preferred color. To accompany the Colorsonic, L'Oréal Paris has also introduced the brand’s first multi-usage permanent hair color cartridge. You can use each color cartridge up to three times (one full head application or three root retouches), so there’s less chance of any precious formula going to waste.

And, the colors themselves are stunning. There are more than 20 rich, dimensional shades available in the collection, all of which are ammonia-free and formulated without silicones, parabens, SLS, SLES, or phtalates. The nourishing formulas are suitable for all hair types, textures, and lengths, and leave the hair looking (and feeling) healthy, with long-lasting expert color and shine.

Step 2: Pop in the color cartridge

Once you’ve picked your shade, insert your cardboard color cartridge into the Colorsonic and press the power button. The tool will automatically mix colorant and developer in a perfect 1:1 ratio for the freshest, non-oxidizing formula.

Step 3: Brush the wand through your hair

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Now, you’re ready to start the actual hair dyeing application. Begin by placing the brush-like bristles of your Colorsonic wand at your hairline. Then, hold down the button as you stroke the device through the ends of your hair as if you were running an actual brush through it. With every pass, the oscillating smart bristles automatically part your hair while saturating your hair from root to tip with rich, high-quality color. The bristles can also adapt to your hair length and curl pattern, delivering the perfect amount of professional-grade color every time.

Tips for Dyeing Your Hair at Home

Regardless of the method used to dye your hair, preparing for a new hair color generally remains the same. Heed the following advice to help make your next color transformation even more seamless.

Unwashed hair may be best

Although dyeing both clean and dirty hair can yield the same color results, many pros recommend the latter if you have sensitive skin. This way, your scalp’s natural oils can build up and create a barrier between the dye and your skin, reducing the risk of irritation. If possible, try to wait two or three days after shampooing before coloring your hair.

Do a patch test

Speaking of irritation, carrying out a patch test can also be helpful to avoid any potential side effects. According to the National Health Service (NHS), the ingredients found in certain permanent dyes can cause a rashy, bumpy reaction known as contact dermatitis. As such, the NHS recommends swabbing a small amount of dye behind your ear or along your inner elbow, letting it dry, and seeing how your skin reacts. If the area appears red or inflamed when you remove it, do not use the product to color your hair.

Apply dye to dry hair

One of the biggest questions about at-home hair color is whether it’s better to dye your hair wet or dry. The short answer is that it depends on the formula. Some hair dyes, like demi-permanent and semi-permanent, can be applied to wet hair for an intentionally sheerer result. Permanent hair color, on the other hand, should typically be applied to dry tresses for vivid, saturated color. The reason is that when hair is wet, moisture can dilute the chemicals that help alter your hair color on a deeper, more permanent level. Reducing the potency of these ingredients can result in dull or uneven coverage. As always, we advise reading the instruction label of your chosen hair dye before getting to work.

Set a timer

Hair dye application instructions often vary by shade, so it’s important to read the included label so you know how long your color needs to process. In addition, there are a few factors that can influence how long it takes for your hair dye to work. These can include your starting shade, hair texture (finer hair tends to process more quickly), and whether your hair is virgin or color-treated. Leaving your dye on longer than recommended can lead to overprocessed hair. We suggest setting a timer on your phone based on the dye’s instructions so you don’t go overboard. When the time is up, thoroughly rinse your dye until the water runs clear.

What Color Should I Dye My Hair?

With so many gorgeous hair color trends floating around social media, choosing just one can feel overwhelming. But instead of thinking of a new hue in terms of light, medium, or dark, we recommend narrowing it down based on your skin’s undertones. Put simply, undertones are the subtle underlying pigments in your skin that influence its overall tone. Coordinating your hair color with your undertones can help illuminate your complexion versus washing out.

Undertones can be either cool, warm, or neutral, and determining yours is fairly easy: Turn your hand over and see whether the veins visible on the underside of your wrist appear green (warm), blue (cool), or a mix of both (neutral). With this knowledge in mind, you’ll want to select hair colors with the same undertone. For example, golden, caramel, and bronze hair colors look striking against warm-toned skin, while platinum blonde, jet black, and ash brown tend to pair well with cool-toned skin. If your undertones are neutral, you can try almost any hair color with flattering results. Use our L'Oréal Paris Virtual Foundation Matcher if you need more guidance on accurately assessing your skin tone, or take our Hair Color Quiz to find a range of shades that’ll work well for you.

Remember, these are just guidelines to consider and not strict rules. At the end of the day, you should pick a new hair color that makes you feel the most beautiful and empowered version of yourself.

How To Care For Dyed Hair

Learning how to dye your hair using the Colorsonic may be step one in achieving gorgeous salon-like results, but what comes next matters, too. After coloring your hair, it’s important to tweak your haircare routine to help maintain your new hue. Here’s how.

Pick up color-safe products

A color-safe, sulfate-free shampoo and conditioner is essential for keeping your dyed strands looking healthy and vibrant. Try L’Oréal Paris EverPure Sulfate Free Bond Repair Shampoo with Citric Acid and L’Oréal Paris EverPure Sulfate Free Bond Repair Conditioner with Citric Acid to help preserve your color and repair your hair in one fell sweep. The duo, which features citric acid, penetrates inside the hair’s cortex to help rebuild weakened hair bonds from coloring services without dulling your color.

Refresh with a hair gloss

If your dyed hair has lost its luster, give it a refresh with a hair gloss, like the L’Oréal Paris Le Color Gloss One Step In-Shower Toning Gloss. In as little as 15 minutes, this in-shower hair treatment helps enhance your hair color, refresh its tone, and deeply condition your strands. Try using the universal clear shade to give your locks a glassy shine, or select one of the 14 other shades designed to match a variety of hair colors.

Reduce heat styling

Limiting heat styling is one of the best ways to help reduce hair damage. However, if you still want to use hot tools to perfect your look, be sure to apply a heat protectant and turn your tools to their lowest temperature setting. We’re partial to our L’Oréal Paris Elvive Dream Lengths Frizz Killer Serum Leave-In and L’Oréal Paris EverPure Sulfate-Free Weightless Blow Dry Primer, Heat Protectant to help shield your mane.

Sign up for more Colorsonic launch information here.

Next Up: Introducing L'Oréal Paris Colorsonic, The New At-Home Hair Color Device

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