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GDY Kowabunga

Rated 5.00 out of 5 based on 18 customer ratings
(18 customer reviews)


A radioactive shade of neon green for all our bitchin’ and bodacious babes.

  • Creamy Vegan & Cruelty Free Formula 5 oz tube
  • Botanically Infused with Natural Sunflower Extract
  • Ammonia Free, Formaldehyde Free, Peroxide Free, PPD Free 

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In stock

SKU: 858351006550 Categories: , ,
What does it do?

Our semi-permanent hair dye line combines salon-grade pigments with a nontoxic, conditioning formula that deposits ultra vibrant color. Semi-permanent hair dyes do not damage the hair, in fact they’re super conditioning! GDY’s formula combines a high-quality cream base, like a hair mask with essential oil benefits. The color is deposited on top of the hair shaft and acts like a stain that will fade out over time each time you wash your hair. Color can last anywhere from 4-6 weeks. We recommend using color protecting hair care like our GDY Color Kind Line to keep color vibrant longer.

What does it smell like?
Fragranced with Bergamot essential oil, our semi-permanent dye has a light citrus scent that is mood lifting.

Is this for my hair?

Our semi-permanent dyes will show the truest color on pre-lightened hair, levels 8-10. We recommend using our Lightening Kit to get the perfect base shade for your color.

What to know?
Semi-perm is a thick, conditioning formula, no need to mix with a conditioner.
Color payoff will vary based how much hair is lightened as well as on the porosity of the hair and underlying hair chemistry. We recommend a hair strand test to determine color payoff.

Safe on:
All hair textures, pre lightened, chemically treated, keratin treated, and color treated hair.

  • Healthy hair focused, no PPDs, Ammonia, Sulfates, Parabens or other harsh for hair chemicals or additives.
  • Sunflower Extract adds extra UV protection from the sun and hot tools that fade hair.
  • Fragranced with essential oil Bergamot, known for its mood-lifting properties.
  • Ultra creamy formula that deeply conditions while depositing color.

Our Semi-permanent dyes are free from:

  • 4-ABP
  • Ammonia
  • Peroxide
  • Formaldehyde
  • PPD’s
  • Persulfates
  • Paraben
  • Resorcinol
  • MEA
  • Nickel
  • Bleach
  • Phthalates
  • All of our products are vegan and cruelty free
  • Step 1: To create the best canvas for your color, we recommend lightening your hair using our GDY Lightening Kit.
  • Step 2: Mix color in the GDY Color Mixing Bowl and use gloves to prevent staining hands.
  • Step 3: Ensure you strand test first before applying color all over your head.
  • Step 4: Section and apply directly onto dry hair. Make sure color is fully saturated at every step by combining product through each section.
  • Step 5: Let the color sit for at least 30 minutes.
  • Step 6: Rinse with cold water and style as desired with GDY Prime.

  • Allow at least 24 hours before your first shampoo.
  • Rinse hair with cool water each time you wash to minimize fading process.
  • Reduce hair washing days to extend color.


  • While color is processing, use a cap to keep the color damp.
  • Coloring your hair is an investment. Make sure to use color protecting hair care like GDY’s Color Kind Line to keep color vibrant longer.
  • Product will stain, so protect hands, all surfaces and clothing.
  • Apply shea butter, coconut oil or thick conditioner to the hairline to prevent staining.
  • Check out our FAQ’s for more information
  • Kowabunga is a true green. Want a neon green instead? Mix Kowabunga and Steal My Sunshine in a 1:2 ratio! (1/2 tube Kowabunga with 1 tube SMS)
  • Kowabunga will add a tint to darker hair and show up vividly on level 7+ hair.
  • Add a few drops of None More Black to create forest green!

Want more tips? Email Hey@gooddyeyoung.com to ask our expert!

18 reviews for GDY Kowabunga

  1. Laceysomething (verified owner)

    I LOVE this color. Did my hair two toned with Kowabunga and Ex-Girl, and the blue undertones adds the perfect amount of tone to the green. My new favorite GDY color by far!

    • Jackie from GDY

      Hi There!

      So glad to hear you found your new favorite GDY color. Thanks for your review!

      XX Jackie from GDY

  2. Ema Kenyon (verified owner)

    i haven’t even rinsed it out yet and im already in love with the color!! I shaved my head recently and i didn’t need to use too much dye so it’s convenient that i can cap the dye and keep it for touch ups!!

    • Jackie from GDY

      Hi Ema,

      So glad to hear you love the color! In addition to using it for touch ups I also suggest mixing it with your conditioner to create a color deposition conditioner to keep your color fresh. Our hair expert Becca made a YouTube video on it, check it out on our page.

      XX Jackie from GDY

  3. Elizabeth Vick (verified owner)

    First time using a green hair color and VERY happy.
    Vivid color that took really well and does not bleed or stain.

    • Jackie from GDY

      Hi there!

      This is what we like to hear! So glad you are happy with your green hair!

      XX Jackie from GDY

  4. Sarah Ferguson (verified owner)

    Kowabunga is by far the best green dye I’ve used! After using the Lightning Kit I had some very light parts and some medium parts (my hair had grown out after being dyed black, I consider the amount of lift quite good) and applied the green. The very light hair is a bold and bright green (nice!) and the darker hair is a lovely emerald with some lighter parts throughout. Overall wonderful experience, it smells SO GOOD.

    • Jackie from GDY

      Hi There!

      Yes, green queen! So glad you are loving Kowabunga. Im sure you hair looks AWESOME! Happy to hear your had a wonderful experience.

      XX Jackie From GDY

  5. jauffre (verified owner)

    This is definitely the best hair dye formula I have found for my hair. I am naturally blonde, and I prefer not to bleach where possible, and this dye stains my hair so well and fades so beautifully that other hair dyes seriously don’t compare. Not to mention I have to purchase it much less frequently because of how well it stays in my hair. I recommend GDY to everyone who asks me for hair dyeing advice just because it’s so ****** good.

    • Jackie from GDY

      Hi There!

      I am so glad to hear you are loving the green dye! We packed it with pigment so you don’t have to dye as often.

      XX Jackie from GDY

  6. Valorie (verified owner)

    I’ve used this since it came out and it is super bright and lasts forever! I always bleach my roots and dye it green and I love that it glows in blacklight! I’ll keep buying it again and again.

    • Jackie from GDY

      Hi Valorie,

      Thank you for your review! I am so glad you are loving our green. Keep rocking your glowing roots.

      XX Jackie from GDY

  7. toridw317

    This is a very late review, but I purchased this dye back in October of 2019. This was my first time going green and until January 31st of 2020 the green was STILL in my hair.

    This is a pro and con, but this color does last. To me, I think it even fades to a nice pale green, which is a huge plus in my book. As I like to give my hair breaks from the bleaching and dying, this is a color I would recommend for how long it keeps.

    • Jackie from GDY


      Thanks for your review on Kowabunga. So glad you love the color and the lasting power of it. Can’t wait to see your next look.

      XX Jackie from GDY

  8. erintaylor645

    I have never used this product before but I would 10/10 recommended it to any of my friend I but it over slightly orange hair and it came out as this very green gorgeous color

    • Hallie

      Hello Erin!

      Thank you so much for letting us know how Kowabunga worked out for you! We love this vibrant shade of green and we’re glad you do too!

      xx Hallie from GDY

  9. ilikepunkrock

    (i’ve used this product before and it’s definitely 5 stars) okay just a question so I have black hair, and I wanna dye my hair that emerald green color. Should I use this and add none more black, i don’t really wanna bleach my hair, would this color alone just make my hair that emerald? or should I add a bit of none more black

    • Becca Sievers

      Hey! Our dyes work best with pre-lightened hair. Unfortunately, semi-permanent dye will not show up on black hair to give you that emerald green. We suggest pre-lightening your hair to about a level 6-7 and then adding Kowabunga with a little bit of None More Black to achieve an emerald green! If you have any other questions, please email us at hey@gooddyeyoung.com!
      xx Becca from Good Dye Young

  10. mikey :^)

    I was wanting to try out GDY ever since it came out, and I got the poser paster a little while back. Because it was so good, I saved up a little money and got Kowabunga and I was absolutely AMAZED at the colour. I did a half-blue and green look with Manic Panic for the blue, and GDY outlasted MP over a week!! This is simply the best semi-permanent hair dye I have ever used and will forever be a fan.

    p.s. it outlasted the colour I got done the first time professionally (which was also green) and it made my hair feel like heaven.

    • Hallie from GDY


      Thank you so much for giving GDY a go! We’re so pleased that our Kowabunga surpassed your expectations! Our dyes are formulated with sunflower extract and a blend of essential oils which help to condition and strengthen hair while also providing that great scent!

      If we can help you with anything, please let us know!

      xx Hallie from GDY

  11. Ahoycaptinmattie

    We finally started selling GDY in the Sally’s I work at and I was more then excited to try it out being a huge Paramore fan. It is the BEST semi-permanent color I have ever used! The color is gorgeous and it keeps my hair feeling amazing but, the most important part is the color lasts foreverrr. 1000 out of 10 will recommend to every customer and everyone I know!

  12. Ahoycaptinmattie

    We finally started selling GDY in the Sally’s I work at and I was more then excited to try it out being a huge Paramore fan. It is the BEST semi-permanent color I have ever used! The color is gorgeous and it keeps my hair feeling amazing but, the most important part is the color lasts foreverrr.

  13. meLiA (verified owner)

    Amazing! The $8 shipping still came fast af and oh man the packaging does not disappoint. I did hang it up on my wall. The dye itself is so vibrant, conditioning, and it smells amazing. The coverage is to dye for. I finally am living my Teenage Mutant Ninja Turtles dream. Gonna go get some pizza now.

    • Hallie from GDY


      We’re SO excited that you’re getting to live out your TMNT dream! Thank you so much for your kind words and support of GDY!

      xx Hallie from GDY

  14. Anny

    sis !! if you’ve ever wanted that grass lookin vibe here she is! in all seriousness, kowabunga fades so beautifully and it’s so pretty I’m general. gdy has ruined me for any other dye.

    • Hallie from GDY

      Hi Anny!

      We’re so glad you love Kowabunga as much as we do! Thank you so much for loving and supporting GDY!

      xx Hallie from GDY

  15. AhoyAiryn (verified owner)

    Green is my new favorite color!

    I added just a touch of None More Black, as my hair is slightly warm toned, and the color is so vibrant and intense! Because I’m extra, I’ve got a spot in my bangs that is straight Kowabunga sans NMB, and it’s so beautiful and insanely vibrant! I recolor every two weeks to keep it super bright, though I’m positive I could get away with waiting longer between applications. It applies like a dream and smells absolutely fantastic. Totally recommend!

    • Hallie from GDY


      This sounds like such a cool look, please be sure to tag us in your photos on social media so we can see! Thank you so much for taking your time to leave us such kind feedback!

      xx Hallie from GDY

  16. PatrickPeavy (verified owner)

    I had previously lightened hair and wanted to do something new. I started with a mix of Narwhal and Blue Ruin but the next day used the lightening kit and then Kowabunga. The next day I used some None More Black to create some dimension and had an awesome emerald green going on. I called it “From The Edge of The Deep Green Sea” after the song by The Cure. Very pleased with this green color. I also like how you can use it to cancel out the voilet undertones of None More Black.

    • Hallie from GDY


      Even though there’s not a photo of your look posted here, we absolutely love it! Thank you so much for supporting GDY and being part of our colorful community!

      xx dye happy,
      Hallie from GDY

  17. Uffie

    I have very short hair and one whole bottle was used on mine. I mixed the green with a bit of black to get a much less bright color, I also did not bleach or lighted my hair (it’s naturally an ash blond/light brown) and it was just the color I was going for. It did fade some but after 3 months is still pretty green. I’m going to redye it to make the color more green as well as because my hair has grown out about 2 inches. Anyway I love this dye, I got just the color I wanted with it, it lasted very long, and it smells phenomenal! The first two washes after dyeing the shampoo on my hands was only very slightly green.

    • Hallie from GDY


      Thank you so much for leaving this review! We’re SO happy to hear that you were able to get the exact color you wanted from Kowabunga and None More Black. If there’s anything else we can help you with, please let us know!

      xx dye happy,
      Hallie from GDY

  18. Meredith Allen

    I LOVE this green and I love how much product I got from one tube.

    • Hallie from GDY


      We are SO happy you love our Kowabunga! One tube has a TON of product and is usually perfect for those with shorter hair!

      xx dye happy,
      Hallie from GDY

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