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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To not let 14yo dye her hair blue!

127 replies

narcASD · 28/07/2026 18:43

Daughter has just turned 14, she's ordered herself a crazy colour bottle of sapphire blue hair dye and wants to dye her very long, dark brown hair blue.

We have a big family wedding on the 15th August, plus I doubt it'll all wash out before she returns to school.

Now having a major meltdown but I don't think I am being unreasonable to say no, do you? A

OP posts:
DrinkFeckArseBrick · 28/07/2026 22:05

I think fine to let her do it, other than the wedding. She's in the bridal party! Normally I think that brides shouldn't try and change people's appearance but unless the wedding is mega relaxed I think a lot of brides would be upset if someone in the bridal party deliberately died their hair an unnatural colour that could stand out in pictures, just before their wedding. They might say they're OK with it but personally I think it's a bit rude

Summerunlover · 28/07/2026 22:11

I let my 12 year old dye the ends of her hair green for the summer. Her hair her choice. I think are being untranslatable she could at least do the ends.

Runningswanker · 28/07/2026 22:20

Let her do it, but only because it won't do anything on unbleached dark brown hair. It might make her hair look a bit muddy, or have the faintest blue tinge, but that's it.
As everyone has said, it needs to be bleached to get blue, and not just a bit lightened, the hair needs to be peroxide (yellow blond + blue would go green, and lightened to a coppery colour would end up muddy brown)
It will stain her skin though, so protect that (vaseline on hairline and forehead is good) and lots of towels, plus have a bottle of spray bleach ready in the bathroom for any stains!

If she really wants a nice look, get her in a salon to have the tips lightened and put a colour on those, still subtle enough for a wedding.

ToKittyornottoKitty · 28/07/2026 22:33

VimesandhisCardboardBoots · 28/07/2026 21:42

Eh, if she's old enough that me and her Mum have to bloody listen to it, she's old enough that I can call it shagging.

She'd have been more disgusted the other week if I asked her to "keep the noise down when you and X are 'making love'"

You can call it sex you no

VimesandhisCardboardBoots · 28/07/2026 23:02

ToKittyornottoKitty · 28/07/2026 22:33

You can call it sex you no

We could, but we don't. It's been shagging in our house, pretty much since DD was 15 and we were watching Buffy and Spike said "Cup of tea, cup of tea, almost got shagged, cup of tea"

It's just a word. It means having sex, but. It's no more or less vulgar than "having sex" is.

sanityisamyth · 28/07/2026 23:23

IronEverything · 28/07/2026 20:03

I'd tip it down the sink in front of her. Not a chance in hell I'd allow that in my home.

Its hair dye, not crack cocaine!

Mumtobabyhavoc · 28/07/2026 23:33

ForLoudUmberScroller · 28/07/2026 21:56

I’ve dyed my 12 year old daughter’s hair blue. I helped her do it . Shes been asked for a few years . We bleached it first then dyed it , only peekaboo (just the underneath) come September we will dye it back to normal for school . We had a few issues with attitude for the last year or so, I think it’s certainly made us closer . She likes to curl it and it looks bloody amazing.

An excellent approach. 💕👏

ExtraOnions · 28/07/2026 23:39

DD first dyed her get at about 14.. washed it out before school. Has beeb dying it “properly” since 16, is 20 now.. still dying, 3 lip piercings, and off for her first tattoo next week. I’ve always told her I believe in Female bodily autonomy, it’s not for me, or anyone else, to tell her what to do with her own body.

(as yea she has ASD, plays D&D, has lots of online friends …and real ones)

TrixieFatell · 28/07/2026 23:42

Blue is a bugger to get out. My child ended up going back to school with hair that had a green tinge as apparently 6 weeks isn't enough time to wash a semi permanent blue out. Looked good though but the school.were not happy

ToKittyornottoKitty · 29/07/2026 00:20

VimesandhisCardboardBoots · 28/07/2026 23:02

We could, but we don't. It's been shagging in our house, pretty much since DD was 15 and we were watching Buffy and Spike said "Cup of tea, cup of tea, almost got shagged, cup of tea"

It's just a word. It means having sex, but. It's no more or less vulgar than "having sex" is.

It is when referring to your own kids. Anyway, agree to disagree.

ToKittyornottoKitty · 29/07/2026 00:22

narcASD · 28/07/2026 21:35

Thanks for all the replies, update - we are doing it together tomorrow 😖
Ive checked with the bride and she is ok with it, fingers crossed it won't look too bad

Glad you are doing it with her OP! You may need to patch test though first, check the packaging first

TheWonderhorse · 29/07/2026 00:31

My DD14 did hers the other day, she wanted it brighter blue but it's a dark almost petrol blue. It's gorgeous. Last summer she went bright red.

I love her natural reddish gold hair but it's not my head, so I get behind whatever the hell plan she comes up with and get the gloves on. It's a lot of quality chatting time and that's priceless.

avilsdedvocate · 29/07/2026 00:46

It wont go blue

YouMightLikeIt · 29/07/2026 07:14

As most have said, to make dark hair actually blue, it would need to be bleached (to white). Any hint of yellow and the hair would appear green.

Assuming it's going over her natural colour and it's very dark brown with no lighter tones running through it, at best it will look ashy and slightly more dull/less shiny.

It will wash out. Crazy Colour is a temporary dye meaning it sits on the surface of the hair.

Be warned, if there are naturally lighter areas in her hair, you may get tinges of green.

Make sure you wear gloves and old clothes. Do it somewhere you can use a dash of household bleach to clean up any splashes - such as a bathroom.

She will have a very blue scalp so make sure it doesn't get all over her face!

greencatwitch · 29/07/2026 08:10

I don't see anything wrong with this.

Just make sure it is temporary dye that will wash out. On dark hair it is unlikely to come out that blue anyway.

I think the wedding thing is about yourself trying hard to get your family to look prefect in picture...

Let your daughter have fun instead and enjoy her holiday.

getupdostuffgotobed · 29/07/2026 08:12

PashaMinaMio · 28/07/2026 19:05

My daughter did it at 14. Its a rite of passage.
Help her do it. Just shrug and get it done.
My daughter never did blue again. Lesson learnt!
It’s fun! Go with the flow.

This.

Just be pleased she hasn't convinced a tattooist/piercer that she's 18.

All of mine have had weird colourings/cuts. Including DD3 shaving her head.

I think they are all back to normal now. Sadly DD1's tattoos are there for good.

Sharptonguedwoman · 29/07/2026 09:44

ToKittyornottoKitty · 28/07/2026 18:46

Don’t be so controlling, she’s not a baby and it’s not your hair

It's not control it's the fallout. My DD used to dye her fringe red in the school holidays. If it wasn't completely gone by September the school head would be on the warpath. It's not worth the agro. Dye the ends by all means and a good trim in September.
DD's hair currently cerulean blue for friend's wedding.

Mischance · 29/07/2026 13:02

I have no idea why schools get their knickers in a twist about blue hair or any other colour. You can still learn whatever the colour of your hair, as indeed students at sixth form colleges and universities manage to do perfectly well.

Jasmin71 · 29/07/2026 14:00

It won't work anyway. It will just leave a sludgy tint on anything darker than a level 8 hair colour.

Let her do it= Life lesson as it will look awful

Cherrysoup · 29/07/2026 15:37

IronEverything · 28/07/2026 20:22

Because it looks absolutely ridiculous and because it's now a symbol of being part of some chronically online group of people who love self-diagnosing with illnesses and disabilities they don't have and "identifying" as bizarre things.

Dons tin hat and this isn’t my opinion, kids at school aren’t allowed to use ‘unnatural’ colours (not my wording!)

Wasn’t going to respond to this thread, but a police officer remarked that blue hair-mental health issues, in his experience. He says anyone he deals with who has blue hair=someone with mh.

crackofdoom · 29/07/2026 15:48

squirrelchops2 · 28/07/2026 19:23

Yeah, unless she wants everyone to assume she's ND, don't do it.

I'm neurodiverse and I dye my hair blue. I don't consider it to be a signifier of anything, but if it lets people know I'm not a (shudder) neurotypical, that's all to the good. I certainly wouldn't want to be mistaken for one of those.

Boomer55 · 29/07/2026 15:50

narcASD · 28/07/2026 18:43

Daughter has just turned 14, she's ordered herself a crazy colour bottle of sapphire blue hair dye and wants to dye her very long, dark brown hair blue.

We have a big family wedding on the 15th August, plus I doubt it'll all wash out before she returns to school.

Now having a major meltdown but I don't think I am being unreasonable to say no, do you? A

If it’s a ‘wash out quickly’dye then let her do it in the holidays.

If it’s not, then no.

crackofdoom · 29/07/2026 15:51

Cherrysoup · 29/07/2026 15:37

Dons tin hat and this isn’t my opinion, kids at school aren’t allowed to use ‘unnatural’ colours (not my wording!)

Wasn’t going to respond to this thread, but a police officer remarked that blue hair-mental health issues, in his experience. He says anyone he deals with who has blue hair=someone with mh.

How many normal, stable people do police officers have business with?

Is it just hair colour this stellar individual jumps to conclusions about, or is he the same with skin colour? 🤔

Cherrysoup · 29/07/2026 15:54

crackofdoom · 29/07/2026 15:51

How many normal, stable people do police officers have business with?

Is it just hair colour this stellar individual jumps to conclusions about, or is he the same with skin colour? 🤔

That’s a massive jump and no, least racist person I think I know. What a ridiculous comparison.

crackofdoom · 29/07/2026 16:00

Cherrysoup · 29/07/2026 15:54

That’s a massive jump and no, least racist person I think I know. What a ridiculous comparison.

No, I wouldn't say it was that much of a jump, especially given the historic institutional racism endemic in most police forces.

It's all judging people by their appearance- perhaps relatively innocuous at one end of the spectrum, but very definitely not at the other.

Anyhoo, great to know that if I got assaulted or something I'd be judged to be mentally unwell (and therefore less credible) if I reported it to someone like this 🙄.

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