---
product_id: 178030935
title: "Blue Black Hair Dye Permanent with Anti-Breakage Plex Hair Care, Vegan Hair Dye & Cruelty-Free, 100% Grey Coverage, Midnight Blue, For All Hair Types. Smart Beauty"
brand: "smart beauty"
price: "€ 49.71"
currency: EUR
in_stock: true
reviews_count: 9
category: "Smart Beauty"
url: https://www.desertcart.gr/products/178030935-blue-black-hair-dye-permanent-with-anti-breakage-plex-hair
store_origin: GR
region: Greece
---

# Vegan & Cruelty-Free Formula Permanent Blue-Black Shade Plex Hair Treatment Protection Blue Black Hair Dye Permanent with Anti-Breakage Plex Hair Care, Vegan Hair Dye & Cruelty-Free, 100% Grey Coverage, Midnight Blue, For All Hair Types. Smart Beauty

**Brand:** smart beauty
**Price:** € 49.71
**Availability:** ✅ In Stock

## Summary

> 🔷 Own the night with Blue-Black brilliance — color that commands attention!

## Quick Answers

- **What is this?** Blue Black Hair Dye Permanent with Anti-Breakage Plex Hair Care, Vegan Hair Dye & Cruelty-Free, 100% Grey Coverage, Midnight Blue, For All Hair Types. Smart Beauty by smart beauty
- **How much does it cost?** € 49.71 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/178030935-blue-black-hair-dye-permanent-with-anti-breakage-plex-hair)

## Best For

- smart beauty enthusiasts

## Why This Product

- Trusted smart beauty brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Hair Health Revolution:** Infused with plex treatment to rebuild and protect hair structure during coloring.
- • **Ethical Beauty Commitment:** UK & EU cosmetic standards, vegan, cruelty-free, and eco-conscious for guilt-free glam.
- • **Unmatched Color Longevity:** Permanent dye that covers greys and roots flawlessly for a bold, lasting look.
- • **Inclusive for All Hair Types:** Designed for every texture and tone, from chemically treated to Afro and Asian hair.
- • **Effortless, Mess-Free Application:** Precision nozzle and smooth cream formula ensure a drip-free, salon-quality experience at home.

## Overview

Smart Beauty’s Permanent Blue-Black Hair Dye offers a rich, long-lasting color transformation with 100% grey coverage. Enhanced by a protective plex treatment, it rebuilds hair structure while delivering a smooth, mess-free application. Suitable for all hair types and ethically crafted with vegan, cruelty-free ingredients, this award-winning kit ensures professional results at home with minimal environmental impact.

## Description

desertcart.com : Blue Black Hair Dye Permanent with Anti-Breakage Plex Hair Care, Vegan Hair Dye & Cruelty-Free, 100% Grey Coverage, Midnight Blue, For All Hair Types. Smart Beauty : Beauty & Personal Care

Review: So far so good! - I’ve had purple hair since 2018 so I would say I have years of experience with a variety of bright color hair dyes from many different brands. My natural hair color is medium dark brown, but I’ve had gray hair since I was a kid and 30-35% of it is gray. Semi-permanent color doesn’t really cover my grays, so I had to use Ion Permanent Brights in purple for my roots, and ArcticFox for the rest, which after trying MULTIPLE brands, this was the one that worked the best for me. I’d still had to co-wash my hair only once a week to make the color last as long as possible, re-color it once a month, and re-touch my roots every 6-8 weeks depending on growth. I love my purple hair but the maintenance process is exhausting! I NEEDED to find a more permanent solution. I stumbled upon Colour-Plex in Amethyst so I decided to give it a shot. I washed my hair with a clarifying shampoo before applying to get rid off as much of the previous color as possible. First impression: Colour-Flex was very easy to mix, it smelled good, application was smooth, and there was just enough product to fully cover my entire shoulder length thick hair. The recommended processing time is 25 minutes, but I left it on about an hour before washing it with cold water using only conditioner and rinsed it until the water was clear. I have to say that I’m very impressed with the results and I like it so far! Once my hair dried, I noticed that my grays were completely covered and it deposited enough color on the rest of my hair so I didn't need to use a color mask after to get it to the shade I like. The color is a deep purple with blue undertones that looks almost black inside and bright purple in natural light, my hair smells amazing and it is sooo soft! Also, I noticed that my hands and nails weren’t stained after styling it, which is a problem I’ve dealt with my previous method. It might be too soon to tell, but I’ll comeback with an update after wash day.
Review: Soft hair, perfect color! - The color came out perfectly and exactly the purple color I wanted. :)

## Features

- Hair dye for dark hair. Transform dark blonde-brown hair to a new look with a permanent Blue black hair dye kit, with a plex hair treatment that protects, rebuilds, and restores your hair's structure
- Permanent dark blue hair dye; for a full head of color, covers grey, root touch-up, balayage, undertones, and lowlights. For all hair types, including chemically treated, Afro, Asian, men, and women
- Vegan, cruelty-free black hair dye. Using UK and European-endorsed cosmetic standard ingredients blended into a smooth cream for home use. Part of the award-winning Smart Beauty hair color collection
- Mess-free application. Mix the black color cream and developer in the provided bottle, evenly apply with the precision nozzle, and work through with gloved hands for a non-drip coloring experience
- Smart Beauty is an independent-owned British business that produces premium vegan hair dye coloring kits. Committed to non-animal testing, ethical practice and minimal environmental impact

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B07QHX1JW5 |
| Best Sellers Rank | #19,574 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #179 in Hair Color |
| Customer Reviews | 4.0 4.0 out of 5 stars (6,760) |
| Item model number  | Black Sapphire Blue Permanent Hair Dye |
| Manufacturer  | Smart Beauty |
| Product Dimensions  | 3.54 x 2.36 x 6.69 inches; 7.23 ounces |
| UPC  | 830577001519 |

## Product Details

- **Brand:** Smart Beauty
- **Color:** Blue Black
- **Item Form:** Cream
- **Package Information:** Tube
- **Product Benefits:** Conditioning, Hair Coloring, Moisturizing, Nourishing, Strengthening

## Images

![Blue Black Hair Dye Permanent with Anti-Breakage Plex Hair Care, Vegan Hair Dye & Cruelty-Free, 100% Grey Coverage, Midnight Blue, For All Hair Types. Smart Beauty - Image 1](https://m.media-amazon.com/images/I/81lmWJlqS2L.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ So far so good!
*by L***O on August 4, 2025*

I’ve had purple hair since 2018 so I would say I have years of experience with a variety of bright color hair dyes from many different brands. My natural hair color is medium dark brown, but I’ve had gray hair since I was a kid and 30-35% of it is gray. Semi-permanent color doesn’t really cover my grays, so I had to use Ion Permanent Brights in purple for my roots, and ArcticFox for the rest, which after trying MULTIPLE brands, this was the one that worked the best for me. I’d still had to co-wash my hair only once a week to make the color last as long as possible, re-color it once a month, and re-touch my roots every 6-8 weeks depending on growth. I love my purple hair but the maintenance process is exhausting! I NEEDED to find a more permanent solution. I stumbled upon Colour-Plex in Amethyst so I decided to give it a shot. I washed my hair with a clarifying shampoo before applying to get rid off as much of the previous color as possible. First impression: Colour-Flex was very easy to mix, it smelled good, application was smooth, and there was just enough product to fully cover my entire shoulder length thick hair. The recommended processing time is 25 minutes, but I left it on about an hour before washing it with cold water using only conditioner and rinsed it until the water was clear. I have to say that I’m very impressed with the results and I like it so far! Once my hair dried, I noticed that my grays were completely covered and it deposited enough color on the rest of my hair so I didn't need to use a color mask after to get it to the shade I like. The color is a deep purple with blue undertones that looks almost black inside and bright purple in natural light, my hair smells amazing and it is sooo soft! Also, I noticed that my hands and nails weren’t stained after styling it, which is a problem I’ve dealt with my previous method. It might be too soon to tell, but I’ll comeback with an update after wash day.

### ⭐⭐⭐⭐⭐ Soft hair, perfect color!
*by M***S on January 14, 2026*

The color came out perfectly and exactly the purple color I wanted. :)

### ⭐ Product stripped my color from most of my hair, but is vibrant on the roots.
*by L***O on January 6, 2026*

UPDATE: I have only washed my hair twice since I used this product letting it sit on my hair for 30 minutes just like I was instructed and here are the latest pictures. I read the directions and did exactly step-by-step. What they told me to do. I have extremely purple roots in places and the rest of my hair was stripped of all of its color. It also dried my hair out so much I had to layer it and now I have a mullet. The last photo was what the color looked like before I used this hair color. I didn’t know it would strip out all of that violet color that I had. I just wanted to cover my roots as you can see in the three prior photos, my hair is brownish silver now with purple roots. I am extremely unhappy.

## Frequently Bought Together

- Smart Beauty Blue Black Permanent Hair Dye, Vegan & Cruelty-Free, 100% Grey Coverage, Midnight Blue, Anti-Breakage Plex Hair Care, For All Hair Types
- KISS Lift Up Complete Hair Bleach Kit with Revitalizing Plex Serum to Protect from Damage, Maximum Strength to Lighten Dark or Resistant Hair, Complete DIY 6-Pc Kit
- Schwarzkopf Got2b Metallics Permanent Hair Color, M49 Smoky Violet

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**Shop now:** [https://www.desertcart.gr/products/178030935-blue-black-hair-dye-permanent-with-anti-breakage-plex-hair](https://www.desertcart.gr/products/178030935-blue-black-hair-dye-permanent-with-anti-breakage-plex-hair)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-12*