Are you tired of your regular hair color and looking for a change? Blue-black hair is a popular trend that can give you a unique and edgy look.

Achieving the perfect blue black hair is an exciting venture for those looking to make a bold statement with their hair color. Blue black is a stunning combination that boasts the depth of midnight black interwoven with subtle blue undertones, creating a strikingly glamorous look.
Whether you’re starting with dark hair or looking to darken your lighter locks, there are several methods to consider, each with its own set of techniques and maintenance requirements. This guide will explore the different approaches on how to achieve blue black hair, including selecting the right dye, application techniques, and tips for maintaining the vibrancy of your blue black hair.
What Will You Need?
Before getting started, ensure you have all the necessary supplies to achieve your desired blue black hair. This can include:
- Hair dye kit in a blue-black shade – there are many options available from different brands, so choose one that suits your preferences and budget
- Gloves
- Mixing bowl and brush for application
- Plastic shower cap or foil to cover hair while the dye is processing
- Shampoo and conditioner specially formulated for color-treated hair
- Deep conditioning treatment or hair mask
Once you have all your supplies ready, it’s time to start the process of achieving blue-black hair.
8 Easy Steps on How to Achieve Blue Black Hair
Step 1: Prepare Your Hair
Preparing your hair is crucial for achieving the best results when dyeing it blue-black. Start by ensuring your hair is clean and free of products such as oils, gels, or sprays that might hinder dye absorption.
It’s advisable to wash your hair a day or two before dyeing to allow your natural oils to build up, which can help protect your scalp during the dyeing process. If your hair is damaged or chemically treated, consider deep conditioning it beforehand to improve its health and elasticity.

Next, gently detangle your hair using a wide-tooth comb to prevent breakage or unnecessary pulling while applying the dye.
Step 2: Choose the Right Shade
Selecting the appropriate blue-black shade is vital to ensure the final result complements your skin tone and personal style. Blue-black hair can range from a dark, almost charcoal-like hue with slight blue undertones to a vibrant blue that pops against a deep base.
To find the right shade, consider your complexion; for instance, more relaxed skin tones often pair well with shades with a more prominent blue tint, while warmer tones may benefit from blue blacks that lean slightly towards violet or deep indigo.
Additionally, consider the longevity and maintenance of your chosen shade. Some dyes offer semi-permanent options that can last for a few weeks, while others are more permanent and require touch-ups every 4-6 weeks.
Step 3: Mix the Dye
Mixing the dye correctly is essential to achieving a vibrant, long-lasting blue-black color. Start by putting on your gloves to protect your hands from staining. Carefully follow the instructions on the dye kit; typically, this involves combining the dye and the developer in a mixing bowl.
Using the correct proportions as indicated is essential to ensure the dye activates appropriately. Stir the mixture with your brush until it reaches a smooth and uniform consistency, free of clumps. If you have any extra additives, such as a color booster, you can incorporate them at this stage for enhanced effects.
Once mixed, do a quick patch test on a small section of hair to ensure the desired result before proceeding to apply the dye all over. Prepping everything in advance will lead to a more manageable and efficient application process, allowing the dye to work its magic effectively.
Step 4: Apply the Dye
Now that your dye is mixed and ready to go, it’s time to apply it to your hair. Start by sectioning your hair into manageable parts, typically dividing it into four sections: top, bottom, left, and right. Use hair clips to secure the sections you’re not currently working on.

Begin one section at a time, using the brush to apply the dye from the roots downwards, ensuring even coverage. For the best results, work in small subsections within each more extensive section. Be generous with the dye and work it into the hair strands thoroughly to prevent any patchiness.
Make sure to avoid getting dye on your skin, as it can stain; if it happens, wipe it off immediately with a damp cloth. Once all sections are coated, gather your hair and secure it with a plastic shower cap or foil to help retain heat and enhance the dye’s effectiveness.
Step 5: Set the Processing Time
After applying the dye to your hair, allowing it to develop properly for the right amount of time is essential. Refer to the instructions on your dye kit for the recommended processing time, which typically ranges from 30 to 45 minutes.
During this time, avoiding exposing your hair to excessive heat or moisture is crucial, as this could impact the dye’s effectiveness. To help the dye set, wrap your hair in a plastic shower cap or use a warm towel around your head.
Keeping the hair insulated will help maintain a consistent temperature and allow the color to penetrate more deeply into the hair strands. Use a timer to ensure you stay within the recommended time, as leaving the dye on too long can lead to unwanted results or damage. Once the time is up, prepare to rinse your hair thoroughly.
Step 6: Rinse Out the Dye
Once the processing time is complete, it’s time to rinse out the dye. Begin by standing in the shower and rinsing your hair with lukewarm water, ensuring the water runs clear. Avoid using hot water, as it can strip the hair of moisture and lead to fading of the new colour.

As you rinse, gently massage your scalp to help remove any residual dye. After the water runs clear, apply the conditioner that came with your dye kit, or use a color-safe conditioner designed for dyed hair.
Leave the conditioner in for a few minutes to nourish and hydrate the strands, then rinse thoroughly with cool water to help seal the cuticles and add shine to your new blue-black hair.
Step 7: Dry and Style Your Hair
After rinsing the dye and conditioning your hair, gently pat it dry with a soft towel. Avoid rubbing your hair vigorously, as this can cause friction and damage the newly dyed strands. Instead, blot the hair to remove excess water.
Once your hair is damp, you can air dry or use a blow dryer on a low heat setting. If you opt for styling tools, applying a heat protectant spray beforehand is essential to safeguard your hair from heat damage. Once dry, you can style your hair, whether straightened, curled, or left natural, showcasing your vibrant blue-black hue. To maintain the vibrancy of your color, consider using shampoos and conditioners specifically formulated for color-treated hair and limiting heat styling tools.
Step 8: Maintain Your Blue Black Colour
Regular maintenance is critical to keep your blue-black hair looking vibrant and fresh. Start with a color-safe shampoo and conditioner that helps preserve the intensity of the shade. Aim to wash your hair less frequently, ideally two to three times a week, to extend the life of the color.
When you do wash your hair, use cool water instead of hot, as this helps to lock in moisture and pigment. Additionally, consider incorporating a deep conditioning treatment every few weeks to nourish your hair and prevent dryness.
If you notice any fading, use a color-depositing conditioner or a touch-up dye to refresh your look. Lastly, protect your hair from sun exposure and harsh weather by wearing a hat or using UV protection products, as this can help prevent color fading and keep your hair looking its best.
Following these steps and tips can achieve a vibrant and long-lasting blue-black hair color at home.
5 Things You Should Avoid

- Using Shampoo with Sulfates: Avoid shampoos that contain sulfates, as they can strip your hair of its natural oils and lead to quicker fading of your blue-black color. Instead, opt for sulfate-free formulas that are gentler on your hair and help maintain the vibrancy of your color.
- Exposing Hair to Excessive Heat: Frequently using high-heat styling tools can damage color-treated hair, causing the blue-black dye to fade faster. Always use heat protectant sprays when styling and try to limit heat exposure to preserve your colour.
- Washing Hair Too Often: Washing your hair daily can lead to fading, as water and shampoo can strip away color. Aim to wash your hair only two to three times a week to help maintain the longevity of your blue-black hue.
- Skipping Deep Conditioning Treatments: Neglecting deep conditioning treatments can leave your hair dry and more susceptible to damage. Incorporate a deep conditioning treatment every few weeks to keep your hair hydrated and healthy, which will also help to protect the color.
- Exposing Hair to Sunlight without Protection: Direct sunlight can cause color fading and damage to your hair. Always protect your hair from UV rays by wearing a hat or using UV protection products, especially during prolonged sun exposure.
Conclusion
How to achieve blue black hair requires careful preparation, application, and ongoing maintenance to ensure lasting vibrancy and health.
By following detailed steps—from thorough pre-dyeing hair care to proper dye application and rinsing—you set the foundation for a beautiful color transformation. Post-dye, consistent upkeep with color-safe products and minimizing exposure to heat and sunlight will nourish your hair and keep your blue-black hue looking fresh.
You can enjoy your new hair color with dedication and proper techniques while keeping it healthy and radiant. Embrace your vibrant look and express your unique style with confidence!
About the Author
Jane Hubbard is a passionate beauty expert with a wealth of experience in makeup, hair, and overall beauty techniques. After years of working as a hairdresser specialist, she followed her entrepreneurial spirit and started her own consultancy business.
Jane has always been driven by her desire to help others feel confident in their own skin, and she does this by sharing her knowledge, experiences, and practical beauty tips. Through her consultancy, she empowers individuals to embrace their unique beauty, offering tailored guidance that boosts both self-esteem and personal style.
Professional Focus
- Specializes in makeup, hairstyling, and beauty consulting.
- Provides personalized beauty advice, tips, and techniques to help individuals feel confident in their appearance.
- Dedicated to staying up-to-date with the latest industry trends and developments.
- Passionate about creating a comfortable and empowering experience for every client.
Education History
- University of Craft and Design – Bachelor of Fine Arts (BFA) in Woodworking and Furniture Design
- Woodworking Apprenticeships – Extensive hands-on training with skilled craftsmen to refine carpentry and furniture making techniques
- Online Courses & Masterclasses – Continued education in advanced woodworking techniques, design principles, and specialized tools
Expertise:
- Makeup artistry, hairstyling, and beauty consulting.
- Personalized beauty techniques to enhance confidence and self-expression.
- Educating clients on how to maintain their beauty routines at home.