9 Best Blue Hair Dye Permanent | Blue That Outlasts Shampoo

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Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.

The hardest part of going blue-black at home isn’t picking a shade — it’s finding a permanent dye that actually stays blue instead of fading to flat black in a week. Most box dyes labeled “blue black” lean hard toward black, so the blue only shows up in direct sunlight. This guide cuts through that by comparing what each kit physically is: its shade name, its gray-coverage claim, its formula type, and how the color behaves after the first few washes.

I’m Min — the founder and writer behind Gadgets Feed. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.

Below you’ll find nine permanent blue and blue-black options, sorted by how well each one actually delivers the tone it promises. From ammonia-free gels to salon-style creams and even a water-activated powder, here’s a straight look at the blue hair dye permanent options worth your bathroom shelf, with the honest catch on each.

Our Picks at a Glance

Revlon Permanent Hair Color, Colorsilk 12 Natural Blue Black (Pack of 3)
Best OverallRevlon Permanent Hair Color, Colorsilk 12 Natural Blue Black (Pack of 3)4.7★22,905 ratingsThe three-box kit that made salon appointments optional for a whole generation of gray-coverers. If you want a permanent blue-black that greys disappear under without a harsh chemical smell, this is the one most people end up buying again.Check Price on Amazon
Schwarzkopf Keratin Color 3.11 Deep Dark Blue Permanent Hair Dye
Bond-Building PickSchwarzkopf Keratin Color 3.11 Deep Dark Blue Permanent Hair Dye4.6★119 ratingsA black-in-the-shade, blue-in-the-sun formula with a keratin system that protects curls and texture. If you worry that permanent dye will wreck fine or curly hair, this kit is built for you.Check Price on Amazon
Got2B Metallics Permanent Hair Color, M66 Blue Charcoal
Best Metallic ShineGot2B Metallics Permanent Hair Color, M66 Blue Charcoal4.3★232 ratingsA shimmering blue-charcoal kit whose biggest fans keep it in rotation for the fade-proof color lock. Durability is the main draw, backed by an owner who has kept a blue lock for over 20 years.Check Price on Amazon

How To Choose Permanent Blue Hair Dye That Actually Stays Blue

Permanent dye lifts your natural pigment slightly, then deposits new color molecules deep inside the hair shaft. Those molecules are too large to rinse out, so the color survives dozens of washes instead of washing away like a semi-permanent gloss. Blue fades fastest and misreads worst, so your choice depends on three things: your starting color, how much gray you need to cover, and if you want a vivid-blue payoff or a subtle blue-black sheen.

Know your Starting Shade Before You Buy

Blue pigment is a dark, transparent tone — it cannot lift light hair to a lighter result and it cannot turn very dark hair blue. If your hair is medium brown or lighter, a blue-black dye will deposit visibly and you’ll see the blue clearly. If your hair is already black or close to it, most box dyes will simply deepen the black and the blue will only flash in bright light. This is the single most common source of disappointment with any blue dye, and it is not a defect in the product — it’s the chemistry.

Read the “100% Gray Coverage” Claim Carefully

Almost every permanent kit advertises gray coverage, but the mechanism differs. Cream and gel dyes with a developer lift the cuticle and deposit color, which is why they can cover resistant gray. Deposit-only powders rely on water activation and gentle color deposit, which covers gray beautifully but never lightens. For coarse, stubborn, or wiry gray, a developer-based kit usually grabs and holds better than a gentle formula.

Quick Comparison

Model Best For Shade Formula Type Gray Coverage Claim Amazon
Revlon Colorsilk 12 Natural Blue Black★ Best Overall Covering gray affordably 12 Natural Blue Black Ammonia-free gel, keratin + amino acids 100% gray coverage Amazon
Schwarzkopf Keratin Color 3.11 Deep Dark BlueBond-Building Pick Bond-strengthening blue-black 3.11 Deep Dark Blue Keratin cream, Bond Enforcing System Complete gray coverage Amazon
Got2B Metallics M66 Blue CharcoalBest Metallic Shine Metallic-shine blue tone M66 Blue Charcoal Metallic-shine cream with anti-fading booster Not stated Amazon
Clairol ColorStrong 2.8 Blue Black Ammonia-free with bonding steps 2.8 Blue Black Ammonia-free 3-step with AHA bonding 100% gray coverage Amazon
Schwarzkopf Igora Royal 1-1 Blue Black Salon-style vivid pigment 1-1 Blue Black Professional cream pigment (developer sold separately) Up to 100% white hair coverage Amazon
Naturtint 2NB Blue Black Plant-based ingredient shoppers 2NB Blue Black Ammonia-free, vegan, plant-based Up to 100% gray coverage Amazon
Clairol Nice’n Easy 1BB Deepest Blue Black Rich salon-like blue sheen 1BB Deepest Blue Black Oil-infused cream with 3-tone highlights 100% gray coverage Amazon
Smart Beauty Blue Black Midnight Blue Vegan blue-based color Midnight Blue (Black Sapphire Blue) Vegan cream with anti-breakage plex 100% gray coverage Amazon
Bigen #88 Blue Black Permanent Powder Gentle deposit-only coloring 88 Blue Black Water-activated ammonia-free powder Excellent gray coverage Amazon

In‑Depth Reviews

★ Best Overall

1. Revlon Permanent Hair Color, Colorsilk 12 Natural Blue Black (Pack of 3)

Our pick — over 4.5★ from 22,500+ verified ratings; the strongest balance of quality and price.

Ammonia-Free100% Gray Coverage

The three-box kit that made salon appointments optional for a whole generation of gray-coverers.

If you want a permanent blue-black that greys disappear under without a harsh chemical smell, this is the one most people end up buying again. Each kit is an ammonia-free gel built around keratin and Silk Amino Acid (a protein blend meant to leave hair softer than it started), and Revlon says it delivers 100% gray coverage through its 3D Color Gel Technology. That’s the claim backed by years of repeat buying — the crowd favorite here sits at 4.7 stars across 22,000+ owners, and quality is the thing it gets praised for most, with color right behind it.

The texture is where this kit earns its stripes. The gel glides on thick and clings to roots instead of dripping, so you can work section by section without racing the clock. One long-term buyer moved from shade 52 to 51 to soften her brown and cover gray, and reports the color holds 3-4 weeks before touch-up. The included conditioner is thick enough that it’s worth using as a standalone deep treatment once a week. At 6 x 3.5 x 6.25 inches per box, three kits stack small enough for a bathroom cabinet shelf.

The honest trade-off: longevity. Reds and blues in this formula tend to fade within several washes, though owners who compared it directly to men’s dyes say it holds longer. If you wash daily in hot water, expect a faster fade — cool water and a sulfate-free shampoo stretch it noticeably. The 6 x 3.5 x 6.25 inch box is also lighter in coverage per kit than the Schwarzkopf Keratin Color at 7 x 4.8 x 2.3 inches, so shoulder-length-and-beyond hair may need two boxes rather than one.

Where This Kit Wins

  • Ammonia-free gel with keratin and Silk Amino Acid — no sharp chemical smell during application
  • 100% gray coverage claim, and the thing it’s most praised for is quality
  • Easy at-home root-to-tip process with clear instructions
  • Three kits per pack, so you get a full application plus a root touch-up in reserve

Where It Falls Short

  • Longevity is the weak spot — expect color to soften over several washes
  • Smaller per-box volume than cream-style competitors, so long hair often needs two boxes
  • Some users report skin irritation; do the standard patch test first

The Verdict: The default pick for anyone covering gray on a budget who wants softness and shine rather than a strong chemical lift.

Go Elsewhere If: You need blue that survives daily washing for months without touch-ups — a metallic-booster formula holds longer.

Bond-Building Pick

2. Schwarzkopf Keratin Color 3.11 Deep Dark Blue Permanent Hair Dye

Keratin-InfusedBond Enforcing System

A black-in-the-shade, blue-in-the-sun formula with a keratin system that protects curls and texture.

If you worry that permanent dye will wreck fine or curly hair, this kit is built for you. It’s a 3-step kit — pre-color serum, developer and cream, post-color conditioner — built around what Schwarzkopf calls a Bond Enforcing System. Schwarzkopf claims the system leaves damaged hair 5x more resistant to combing breakage than a non-conditioning shampoo. The pre-color serum is infused with Vitamin B6 and collagen, and the conditioner uses K-Bond Plex technology to help maintain curl pattern and natural texture.

The 8.78-ounce kit runs bigger than the Got2B Metallics at 6.72 ounces, and holds more product per box than the Revlon Colorsilk box above — useful if you’re coloring shoulder-length or longer hair and want to stay in one kit. On dark brown hair that had previously been dyed black, owners describe getting black indoors with a blue flash in direct sun. Gray coverage is where it gets the most praise, and multiple users call the tone genuinely beautiful — the kind of blue-black that reads as intentional rather than accidental.

The catch is box size versus hair length. One reviewer with long hair said she needs four packages to cover everything, and the brand’s own guidance says use two boxes for hair longer than shoulder length. If your hair sits past your shoulders, budget for a double-kit purchase or split your application into two sessions. The other consideration is that on close-to-black starting hair, the blue barely shows — you’ll mostly get a deepened black with a subtle sunlit flash.

On the bond system: The 3-step structure is rare at this size — prep serum first, then dye, then a repairing conditioner. That extra step is what makes the hair feel strong afterward instead of stripped.

On the tone read: Expect blue in sunlight and deep black indoors. That’s the honest read from long-hair owners who weren’t starting from blonde.

Made For: Curly, fine, or damaged hair that needs color protection as much as color payoff.

Look Past It If: You have very long hair and don’t want to buy two or three boxes to cover it.

Best Metallic Shine

3. Got2B Metallics Permanent Hair Color, M66 Blue Charcoal

Metallic-Shine BoosterAnti-Fading Formula

A shimmering blue-charcoal kit whose biggest fans keep it in rotation for the fade-proof color lock.

Durability is the main draw, backed by an owner who has kept a blue lock for over 20 years. One long-term owner reports four months of color before fading, versus the 3-4 weeks she got from other brands. Where Revlon’s Colorsilk leans soft and gentle, the Got2B formula uses a metallic-shine booster designed to leave cool, shimmering tones and an anti-fading effect built into the color itself.

Application is clean thanks to the shake-and-apply bottle: you mix the color cream with the developer lotion inside the provided applicator, and the anti-drip design keeps the process tidy. Owners repeatedly describe the color as soft on the hair and mess-free during application, and the final result reads as a deep blue-charcoal that shifts blue in sunlight. The 6.72-ounce kit is lighter than the Schwarzkopf Keratin Color’s 8.78 ounces, so long hair should plan on two boxes per the brand’s own recommendation.

The real fit note here is the charcoal lean. The shade’s biggest criticism is that on some starting colors, it reads closer to pitch black than blue — owners with dark or previously black-dyed hair occasionally report no navy tint at all. It also stains the scalp briefly, which is normal for permanent pigment and washes out over a couple of showers. If your starting shade is dark brown or lighter, you’ll get the blue flash; if it’s already black, temper expectations.

What Holds Up

  • Reports of four months of color life — drastically longer than the 3-4 weeks typical of other brands
  • Metallic-shine booster for cool, shimmering tones
  • Anti-fading formula built into the dye itself
  • No-mess shake-and-apply bottle with anti-drip nozzle

What’s Mixed

  • Charcoal lean — can read nearly pitch black on already-dark hair
  • Scalp stains briefly after application (normal for permanent dye)
  • 6.72-ounce kit calls for two boxes on shoulder-length-plus hair

Standout Spec: A permanence that survives four months of washes versus the typical 3-4 weeks.

The One Caveat: Its blue reads brightest when you’re starting from medium brown or lighter, not from black.

Best for Sensitive Scalps

4. Clairol ColorStrong Permanent Hair Dye, 2.8 Blue Black (Ammonia-Free)

Ammonia-FreeAHA Bonding System

A three-step ammonia-free kit that trades a harsh chemical smell for a bonding primer and finishing treatment.

If your scalp goes red or itchy after regular dye, this kit is built with you in mind. It’s an ammonia-free kit that runs a full bonding sequence: a Bonding Primer with AHA (an alpha-hydroxy acid that helps prep the hair to receive color evenly), then the permanent color cream with reflective pigments and AHA, then a Bonding Treatment with AHA that seals color in like a top coat. Clairol says the formula is free from ammonia and parabens, and it claims 100% gray coverage. Multiple buyers report no itching or hair-loss reaction — one noted itch-free results on a scalp that normally reacts to other black dyes.

The kit itself is a genuine multi-step process, which is part of the appeal — you’re not just dumping one tube on your head. Owners describe the color as deep, shiny, and uniformly black with a rich blue-black payoff, and they note minimal staining of the skin around the hairline. Coverage is the aspect it’s praised for most, with ease of use running close behind. It’s an 8.78-ounce kit, matching the Schwarzkopf Keratin Color’s 8.78 ounces, so it covers shoulder-length hair in a single box.

The honest limitation: this formula fades faster than some competitors, and the color leans significantly toward black. A couple of owners on dark brown hair report it fading quickly and not always covering their gray completely, and one clearly noted it can dry out your hair if you skip the post-color treatment step. Do not skip that Bonding Treatment — that’s the step holding the color in and keeping hair from feeling brittle.

On the AHA steps: The primer preps the cuticle, the color cream deposits with reflective pigment, and the treatment seals it. Three AHA stages instead of one — that’s the reason this reads as more polished than a single-tube kit.

On the trade-off: Fade speed is the honest catch here. Owners using cool water and washing less often report it holding noticeably longer.

Suited To: Anyone whose scalp has reacted badly to ammonia-based dyes in the past.

Worth a Second Look If: You’re expecting vivid blue rather than a rich blue-black — this one runs dark.

Salon-Grade Pigment

5. Schwarzkopf Professional Igora Royal Permanent Hair Color, 1-1 Blue Black

Professional CreamUp to 100% White Coverage

The salon tube that serious at-home colorists keep coming back to for pigment quality and true tone.

This isn’t a beginner box — it’s a raw 60-gram tube of professional permanent pigment sold on its own. Schwarzkopf Professional (Schwarzkopf’s professional salon line, distinct from the consumer Keratin Color line at position 2) lists it as giving up to 100% white hair coverage, intense color vibrancy, and perfect color equalization even on porous hair. The fiber here is truly professional-grade: 1.6 ounces of pigment concentrate, versus the 8.78-ounce full kits elsewhere on this list. You’re buying pigment, and you’ll supply your own developer.

The reviews read like a long-term relationship. Owners using it two-plus years describe rich, true-to-tone color and glossy, salon-grade results they can reproduce every time. One owner uses a third of the tube per application, works up to full-tube use with no damage, and finds the color lasts longer with cold-water washing. Skin staining does happen, but it fades within two days without any extra effort. Several reviewers simply say they won’t switch to anything else.

The obvious caveat: this is not a one-and-done kit. There’s no developer in the box, no post-color conditioner, no gloves in some listings — you’re sourcing those separately, and you’ll need to know the correct developer volume for the result you want. That’s a real barrier if you’ve never color-mixed before. But if you’ve done any at-home coloring and want the most vibrant, true-to-tone blue-black pigment available, this is what professional colorists grab.

What Pro Users Love

  • Up to 100% white hair coverage from a professional-grade pigment tube
  • Perfect color equalization even on porous hair
  • Repeat owners mention consistent, true-to-tone results over years of use
  • 60-gram tube lasts multiple applications when used section-by-section

What To Know Going In

  • No developer included — you must buy and mix it separately
  • Not a beginner-friendly all-in-one box kit
  • Skin staining takes about two days to fully fade

For the Mixer: Experienced at-home colorists who already own developer and gloves and want salon-grade pigment.

Avoid If: You’re a first-timer — the missing developer and lack of instructions make this one to grow into, not start with.

Plant-Based Formula

6. Naturtint 2NB Blue Black Permanent Hair Color, Ammonia-Free, Vegan

Vegan & Cruelty-FreeUSDA BioPreferred

A vegan, plant-based dye for anyone avoiding ammonia, parabens, and heavy metals in their color.

Where the Revlon Colorsilk is a value-minded everyday dye, this is the alternative-ingredient option for people reading labels. It’s an ammonia-free, vegan, cruelty-free formula enriched with plant-based ingredients, and it holds a USDA BioPreferred certification listing plus ISO 16128 compliance. If parabens, heavy metals, and animal testing are lines you won’t cross with a hair color, this is one of the few permanent blue-blacks that meets those standards while actually delivering.

The color payoff lands somewhere between solid black and true blue-black — the blue is subtle rather than pronounced, so buyers expecting a strong blue cast should look at the Got2B Metallics or Smart Beauty kits instead. The big selling point is the smell or lack thereof: the formula has virtually no ammonia odor, and reviewers with dye allergies report no itching, burning eyes, or scalp irritation. On dry 2b coarse hair, one buyer reports no drying or hair loss. One note for long hair: a lower-back-length user says she needed 2 boxes to cover.

The catch is staining — and lots of it. This dye stains the hairline and skin aggressively, and one owner who has been black-dyeing for over 20 years called it the worst for cleanup. There is a real skill curve involving coconut oil or Vaseline around the hairline before you apply, and thick mix handling. If you are careless, you will have blue-black pigment traces on your neck for a few days.

On the ingredient list: USDA BioPreferred certified, ISO 16128 compliant, ammonia-free, paraben-free, vegan. It’s the shortest list of “no” chemicals on this page.

On the cleanup reality: Staining is real. Line your hairline with a barrier cream before you mix and you’ll save yourself a week of scrubbing.

Chosen By: Label-conscious buyers who want vegan, plant-based, ammonia-free color with strong gray coverage.

The Reason To Pause: Aggressive staining and a mild blue tone — prep carefully and don’t expect vivid blue payoff.

Best Rich Sheen

7. Clairol Nice’n Easy Permanent Hair Dye, 1BB Deepest Blue Black

Oil-Infused Formula3 Tones & Highlights

The traditional liquid-cream dye that delivers raven-black hair with a blue sheen in bright light.

This is the classic grocery-shelf dye updated with a glow. Clairol’s 1BB shade is built with a three-tone-and-highlight system that layers three different pigment tones to mimic the natural variation in hair — the result reads as rich, dimensional black instead of a flat dyed sheet. The oil-infused formula smooths the hair shaft for better color uptake, and the 44-shade lineup makes this the widest range on this list.

Owners describe the result as a “raven’s wing” hue with blue that shines in light — sleek hair with incredible reflectivity, and a level of shine that some compare to salon treatments. This is the Clairol color customers note outperforms pricier brands, and one long-term user says the color lasts weeks without fading after washes. The inclusion of Revitashine Intense Treatment, a bond-strengthening after-dye mask, is what gives it the glossy finish. At 8.15 ounces and 2.37 x 3.56 x 6.31 inches, it matches the Schwarzkopf Keratin Color’s 8.78-ounce fill volume closely enough.

What the reviews flag most honestly: this formula bleeds. Some reviewers point out color running during the first several washes, so reserve a dark pillowcase and old towels for the first week or two. The color condition and application are also mixed — some owners love how it feels, while others need the included treatment to keep hair from feeling dry after coloring. Follow the box: shampoo once, then apply the Revitashine treatment and leave it on for the full recommended time.

Why It Sells

  • Three tones and highlights for natural-looking dimensional color
  • Oil-infused formula smooths hair for better color uptake
  • 44 shades total — the widest lineup on this page
  • Includes Revitashine Intense Treatment for stronger, shinier hair after coloring

The Honest Cons

  • Bleeding during the first several washes — protect bedding and towels
  • Hair condition is mixed — some find it dries hair without the included treatment
  • Longevity varies from user to user

Ideal For: Anyone who wants glamorous, glossy, natural-looking blue-black with the widest shade range available.

Consider Alternatives If: You can’t tolerate the first-week bleed — a metallic-shine formula holds cleaner.

Best for Dark Hair

8. Smart Beauty Blue Black Midnight Blue Permanent Hair Dye

Anti-Breakage PlexVegan & Cruelty-Free

The British-made blue-based kit that’s built specifically for darker starting shades.

Aimed squarely at dark blonde-brown and medium brown hair that won’t budge with a generic blue dye, this is a permanent blue-black from an independently owned British business. It’s a vegan, cruelty-free kit using UK and European-endorsed cosmetic standard ingredients blended into a smooth cream, and it includes a plex hair treatment designed to protect, rebuild, and restore hair structure during the coloring process. Coverage-wise, it handles a full head of color plus root touch-ups, balayage, undertones, and lowlights.

The color story here is unusually direct for a box dye. Owners describe this as one of the only blue-based box dyes they’ve found that isn’t secretly purple-based — a real blue undertone that shows blue in light instead of magenta. On medium brown hair with magenta ends, one user reports even coverage and a true black with navy hue in light. Coverage is what owners praise most, with softness a close second — this one leaves hair noticeably softer than the dye stripped it. The 7.05-ounce kit sits between the smaller 6.72-ounce Got2B and the larger 8.78-ounce Schwarzkopf Keratin Color boxes.

The one thing to be realistic about: durability gets mixed feedback, and this dye tends to wash out faster than the Got2B Metallics. Owners who use cool water and stretch their wash days get a month or more of blue undertone, while others report it gone within two weeks. It’s also a single-use kit — once you mix the color cream and developer, there’s no way to save the rest, so short-hair users waste some product.

On the blue base: This is the pick for anyone who’s been burned by “blue black” dyes that turn out purple. Reports across reviews describe a genuinely blue-based tone, not a magenta one.

On the mid-brown magic: Dark blonde-brown hair is this kit’s balance — that’s the starting color where the blue is most visible.

Best Suited To: Dark-haired colorists who want a true blue-based box dye and can’t find one anywhere else.

Skip It For: Anyone who needs long wash-resistance — the longevity here is shorter than the metallic-shine options.

Gentlest Method

9. Bigen #88 Blue Black Permanent Powder (3 Pack)

Water-Activated PowderNo Ammonia

A water-activated powder that deposits color without lifting — the easiest route to stubborn gray coverage.

The physics of a deposit-only powder matter here. Bigen’s formula is activated by water, and it deposits color into the hair without any of the lifting chemistry that regular permanent dyes use. That means it can’t lighten hair — the manufacturer says so directly, noting the powder will not lift or lighten — but it also means less damage to the strand, and gray coverage that reliably grabs without harsh ammonia contact. In a category where most options push a developer into the mix, this one takes a gentler route.

The results are what draw people in: reviewers describe it as the best permanent hair color around for jet-black with a slight blue tint, and they report it delivers rich, natural-looking color with the kind of shine the powder format is known for. It covers stubborn gray beautifully, and one owner who switched over from semi-permanent says this actually holds the color while semi-permanent dyes simply wash away. The 3-pack here is a convenient format for regular touch-ups, and at 4.2 ounces total, it stores small.

The one point to know up front: this is a deposit-only dye. If your hair is lighter than your target shade, the powder can only deepen it — it will never lift. Reviewers who want to shift their color lighter need a developer-based kit instead. Also, most shoppers say that the powder format is a bit more drying than cream dyes, so pairing it with a good shampoo and conditioner is essentially mandatory.

On the mechanism: Water-activated instead of developer-activated. That difference is why gray gets covered gently, and why hair can’t be lightened — a design choice, not a flaw.

On the shine: Powder formulas tend to leave a distinctive reflective finish, and owners repeatedly call out how shiny and natural the result looks compared to cream dyes.

Precision Fit: Gray-coverage shoppers who want the gentlest possible permanent route and are fine with deepening rather than lifting their shade.

Don’t Pick This If: You’re hoping to lighten your starting color — go for a developer-based cream kit instead.

Understanding the Specs

Shade Names and What They Actually Read

“Blue black,” “midnight blue,” “blue charcoal,” “deep dark blue” — these names describe subtle variations of the same neighborhood. Deep dark blue and blue charcoal are basically black indoors with a blue flash in sunlight. Blue black is a traditional jet-black with a subtle navy undertone. Midnight blue can lean slightly more jewel-toned. When a box promises “blue,” the result on your head depends on how much light is hitting it — real-world owners consistently describe these shades as black indoors and blue in the sun.

Formula Type: Gel, Cream, and Powder

Gel dyes are typically ammonia-free and clings to roots, making them easier to apply section by section. Cream dyes usually work with a developer and smooth the hair shaft for better uptake, delivering richer, more dimensional color. Powder dyes are water-activated and deposit-only — they cover gray gently but never lighten. Each type suits a different hair texture and goal, so matching the formula to your starting shade matters more than chasing a brand name.

Gray Coverage and “Up to 100%” Claims

When a dye says “100% gray coverage” or “up to 100%,” the developer-based kits with a primer step usually grab the toughest gray hair more reliably than gentle deposit-only formulas. On coarse or wiry gray, a cream or gel that lifts the cuticle slightly will deposit color deeper than a gentle ammonia-free formula. If gray coverage is your number one goal, look for a kit that pairs a pre-color treatment with the dye itself.

Bonding Systems and Ingredient Add-Ins

Modern permanent dyes often include bonding technology — keratin, plex treatments, AHA primers, or amino acids — designed to protect the hair structure during the chemical process. These add-ins smooth the cuticle and help hair feel softer afterward. They are not a substitute for post-color conditioning, and they do not eliminate the risk of dryness on damaged hair, but they measurably improve how hair feels in the days right after coloring.

FAQ

Will permanent blue black dye actually show blue on my dark hair?
On medium brown or lighter hair, yes — you’ll see the blue in daylight clearly. On very dark brown or already-black hair, expect the blue to flash mainly in direct sun, with the shade reading black indoors. This is true across every permanent blue-black dye, not a fault of any one brand. If you’re starting from black and want a stronger blue payoff, deposit-only formulas won’t get you there — you’d need to lighten first.
How long does permanent blue black dye last in hair?
Permanent dye stays in the hair until it grows out or is re-colored, but the visible tone softens long before that. Most permanent kits here hold color for weeks, and the Got2B Metallics has owners reporting four months versus the 3-4 weeks typical of other brands. The speed of fade depends on how often you wash, your water temperature, and whether your shampoo is sulfate-free. Cool-water washing and stretching wash days noticeably extends the blue tone.
Do I need to buy two boxes of blue black dye for shoulder length hair?
Yes, for most kits. The Schwarzkopf Keratin Color instruction says to use two boxes for hair longer than shoulder length, and the Got2B Metallics says the same. Reviewers with lower-back-length hair report needing two boxes for a full application. If your hair is very long or very thick, plan on three boxes to cover root to tip without skimping on the ends.
Which permanent blue black dye covers gray hair best?
Developer-based cream and gel kits typically cover resistant gray more thoroughly than deposit-only powders. The Clairol ColorStrong pairs a Bonding Primer with a permanent color cream for its 100% gray coverage claim, and Schwarzkopf Keratin Color uses a 3-step system with a pre-color serum for its complete gray coverage claim. For very stubborn, wiry, or coarse gray, the developer-based route usually grabs better than gentler formulas.
Is ammonia-free blue black hair dye as effective as ammonia based?
For coverage and color deposit, yes — the Revlon Colorsilk 12 Ammonia-Free is a top-rated ammonia-free kit, and the Clairol ColorStrong and Naturtint kits are both ammonia-free with strong coverage claims. What ammonia-free formulas generally don’t do as aggressively is lift your starting color, and the smell is dramatically reduced, which owners with dye allergies specifically appreciate. The trade-off is usually fade speed — ammonia-free kits often need more frequent touch-ups.
Can I use a permanent blue black hair dye on hair I already dyed black?
Yes, you can apply permanent blue-black dye over previously black-dyed hair, and the blue may show more than you expect if there’s any lift in the formula. However, box dyes that are deposit-only — like the Bigen Powder — will simply deepen the black further without adding much visible blue. If your hair is already black, the blue will mostly appear in bright sunlight. Owners frequently describe exactly this result.
Do permanent blue black dyes stain skin and how long does it last?
Most do, at least a little. The Naturtint 2NB and the Schwarzkopf Igora Royal both have documented skin and hairline staining, and owners say pigment traces fade in about 2 days. Lining your hairline with a barrier cream like Vaseline or coconut oil before you start, and wearing gloves during application, dramatically reduces how much skin gets marked. Wipe off any drips immediately with a damp cloth rather than waiting.
Do I need to do a patch test before using a permanent blue black dye?
Yes — the Bigen Powderinstructions explicitly call for a preliminary skin allergy test 48 hours before each use, even for people who have colored for years without issue, and that guidance is worth following for every kit on this list. Mix a small amount, apply it behind your ear or on your inner elbow, and wait the full 48 hours. If you have a known PPD or PTD allergy, check the Clairol ColorStrong warning and consult a professional before using any permanent dye.
Is blue black hair dye safe to use on chemically treated or relaxed hair?
The Smart Beauty kit is described by its maker as suitable for all hair types including chemically treated, Afro, Asian, men, and women. That said, hair that’s been relaxed or bleached recently is more porous, and porous hair takes dye unevenly and can fade faster. Doing a patch test and a strand test before a full application is the safest route. Letting hair rest at least two weeks after a relaxer or bleach session gives the strand time to recover.
Does the semi permanent version of blue hair dye fade differently than permanent?
Yes, and significantly. Semi-permanent dyes coat the outside of the hair shaft and wash away gradually over several weeks. Permanent dyes deposit color molecules inside the shaft, so they won’t rinse out completely — the shade only softens with repeated washing. The Bigen Powder is permanent but deposit-only, which sits between those two worlds. If you want color that doesn’t disappear by wash three, permanent is the category to shop.

Final Thoughts: The Verdict

For most people shopping for permanent blue hair dye, the Revlon Colorsilk 12 Natural Blue Black is the safest bet — it’s ammonia-free, delivers 100% gray coverage, and the crowd of owners who keep re-buying it makes the 4.7-star score the strongest case on the page for a first-time blue-black purchase. If a bond-building kit that protects curls and texture matters more to you, grab the Schwarzkopf Keratin Color 3.11 Deep Dark Blue. For the fade-resistant blue that buyers report lasting four months of washings, reach for the Got2B Metallics M66 Blue Charcoal.

How We Picked

We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.

Sources & Methodology

Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of September 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.

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