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Lime Crime Unicorn Full Coverage Hair Dye, Dirty Mermaid | Green Hair Dye - Temporary Hair Dye, Conditions & Moisturizes, Sugary Citrus Vanilla Scent, Vegan & Cruelty-Free

  • Based on 56 reviews
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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon

Arrives Aug 9 – Aug 13
Order within 22 hours and 54 minutes
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Color: Dirty Mermaid (Seafoam Green)


Features

  • Dirty Mermaid Unicorn Hair Dye: Dyed and gone to Unicorn Heaven! Lime Crime Unicorn Hair is a DIY-friendly, semi-permanent color dye that transforms hair into vibrant colors... all from the comfort of your own home. Dirty Mermaid is a stunning seafoam green that will make your fantasy hair color dreams come true, and its sugary citrus vanilla scent will make your transformation even sweeter!
  • Why You Need It: Not only does our damage-free, vegan hair dye give you fun, vibrant color, but this formula also contains conditioning ingredients like fatty acids and vitamins that help to moisturize your hair and boost shine.
  • Before You Use It: Unicorn Hair deposits super-saturated, vibrant color to pre-lightened platinum to medium blonde hair and adds a tint of color to dark blonde and light brown hair. The life cycle of the color depends on the shade and condition of your hair and how often you wash it. Always do a patch and strand test before coloring your full head because results may vary.
  • Benefits: This formula is free of harsh chemicals like PPD, Peroxide and Ammonia. Lime Crime is certified by both Leaping Bunny and PETA, and we design, manufacture, and assemble quality products using globally sourced ingredients for high performance wear and strong color pay-off.
  • Never Blend In: Lime Crime is a Vegan & Cruelty-Free makeup and hair brand that aims to inspire and invites self-expression. Through our vibrant color products, we encourage all to explore their individuality, embrace their uniqueness and always stand out from the crowd. Find joy through color and re-imagine your boundaries with Lime Crime.

Description

How long does semi-permanent hair dye last? Ideally, your color should last several weeks, but results may vary based on your hair health, how pigmented your dye is, how often you wash your hair, and your lifestyle and hair styling habits. What do you mean by Full Coverage? Our full-coverage hair dyes are our most pigmented, super-saturated formulas and are designed to gradually fade over the course of several weeks. Do I need to bleach before using this hair dye? Our damage-free hair dyes are formulated without bleach or chemical lighteners, so they won’t lighten your hair. As such, you’ll notice the best color payoff when you start with light hair. What colors are best for darker hair? Some of our most pigmented shades include Chocolate Cherry, Sea Witch, Mystic, Valentine, Flaming Red, and Anime. When used on dark hair, these dyes deposit a cute, subtle tint of color. How much Unicorn Hair Dye will I need? We suggest 1 jar for short, bob-length hair, 2-3 jars for hair reaching between the shoulders and waist, and at least 3 jars for hair that reaches beyond the tailbone. Visit the Store Visit the Store Visit the Store

Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 2.5 x 2.5 x 3.75 inches; 0.09 ounces


Item model number ‏ : ‎ L001-84-0001


UPC ‏ :


Manufacturer ‏ : ‎ Lime Crime


Best Sellers Rank: #5,265 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #72 in Hair Color


#72 in Hair Color:


Customer Reviews: 3.7 3.7 out of 5 stars (56)


Color: Dirty Mermaid (Seafoam Green)


Container Type: Jar


Product Benefits: Moisturizing


Brand Name: Lime Crime


Item Form: Paste


Hair Type: All


Number of Items: 1


Manufacturer: Lime Crime


UPC: 816652027230 816652020378


Recommended Uses For Product: Hair coloring at home for pre-lightened platinum to medium blonde hair, and adding a tint to dark blonde and light brown hair


Item Weight: 0.56 Hundredths Pounds


Model Number: L001-84-0001


Manufacturer Part Number: L001-84-0001


Material Features: Cruelty Free


Material Type Free: Paraben Free,Sulfate Free,Ammonia Free


Hair Color Permanence: Semi-Permanent


Unit Count: 6.76 Fluid Ounces


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 9 – Aug 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Fun hair colors
Color: Dirty Mermaid (Seafoam Green)
I love all their color options and they work well.
Reviewed in the United States on August 14, 2025 by M. Thompson

  • Not full coverage very patchy
Color: Dirty Mermaid (Seafoam Green)
This dye looks nothing like it's described. I pre lightened my hair and made sure to remove the existing green before applying. And the dye in the bottle is gray, and if there's any slightly yellow spot doesn't even cover the area. And yes I pre lightened a day in advance and msure my hair was thoroughly washed and dried. I expected it to turn green/blue. But this isn't it. It's not full coverage like the packaging says either. And this is after applying this product twice. So I've now wasted 2 jars and 6 hours for the patchiest and most inconsistent formula. Very disappointing ... show more
Reviewed in the United States on January 23, 2026 by Weeks

  • My favorite hair dye EVER
Color: Dirty Mermaid (Seafoam Green)
I have been using this brand for years and I consistently get good results. It’s last forever, never patchy on me, it smells amazing, and makes my hair super soft afterwards. Highly recommend if you’re looking for a long lasting dye that doesn’t ruin your hair.
Reviewed in the United States on June 25, 2025 by Marley Thomas

  • Pink worked amazing, this blue? Nothing.
Color: Dirty Mermaid (Seafoam Green)
Opt for a darker more pigmented blue over this, my son is platinum blonde and we let this sit for a full hour- absolutely nothing took, no blue whatsoever, so weird. The hot pink is incredible though.
Reviewed in the United States on June 19, 2024 by Dan K

  • Nice color but barely any coverage
Color: Dirty Mermaid (Seafoam Green)
I have lightened hair and naturally light brown / dirty blonde hair. Color will only take with hair that is processed and will not dye any hair that hasn't been processed. Artic fox will dye unprocessed hair
Reviewed in the United States on August 6, 2023 by Mina Gallows

  • No change AT ALL
Color: Dirty Mermaid (Seafoam Green)
My Beloved has grey hair. This didn't work. It made his scalp slightly bluish. But the color - LEDT ON FOR 2 SOLID HOURS after using up the jar didn't do anything outside what a blue rinse could do better. DO NOT BUY FOR UNBLEACHED HAIR
Reviewed in the United States on March 13, 2022 by M Bova

  • Didn’t Take to Hair Very Well
Color: Dirty Mermaid (Seafoam Green)
*Note* this was my first time dying my hair. I loved the color after two rounds of dying my hair/using the entire jar. Could still see blonde peaking through in places, the third picture is a month after dying my hair, it faded from a nice dark teal looking color to green. I bought this from a local hair supply store, I most likely won’t end up buying this brand of dye again. ... show more
Reviewed in the United States on December 24, 2021 by NightElf

  • Doesn’t even look like i dyed it
Color: Dirty Mermaid (Seafoam Green)
I absolutely loved two other dyes from like crime chocolate cherry and some vibrant purple one. This one however dirty mermaid is terrible, it was like a light tint in my Hair and it looks almost the same as it did before I dyed it only now the ends of my hair have greenish tint. It had no full coverage like the others and is a very opaque color on hair, my own hands were barely tinted from the dye whereas the other two stained my hands all over in a vibrant purple. Not a very good dye not sure why this is so bad compared to the rest but I do not recommend and I havent had issues with any semi permanent dye til now ;( ... show more
Reviewed in the United States on May 10, 2022 by Emma

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