History Main / PowerDyesYourHair

* In ''Anime/{{Pokemon}}'', Mallow, Lillie, and Lana go through this in their MagicalGirl episode when they transform. Mallow's hair turns pink, Lillie's turns blue and Lana's turns yellow.

* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fandom has this for Celestia. Young Celestia has pure pink hair compared to her modern iridescent mane. The changing point for most fans is when she used the Elements of Harmony to seal Nightmare Moon, best shown in the Lullaby for a Princess animation.

** After Hody Jones overdosed on Energy Steroids, he became much more muscular and powerful, and his hair turned white as a result. [[spoiler:Which is a subtle early clue regarding [[RapidAging one of the Energy Steroids' nasty side effects.]]]]
** Much later, in the Whole Cake Island arc, [[spoiler:Carrot's transformation into a Ceylon under the full moon has her gain MysticalWhiteHair, and [[PowerMakesYourHairGrow grows it a LOT longer]]]].
** [[spoiler:Luffy's Gear 5 form turns his hair slate white, and even dyes his jacket and pants as well.]]

* When a magical girl's powers awaken in ''Webcomic/SleeplessDomain'' their hair changes color to reflect their powers. The hair color stays the same even when they're untransformed, making them easily identifiable as celebrities, and it lasts as long as they're magical girls. Usually it goes back to normal when they lose their powers upon adulthood, but [[spoiler:Tessa loses her pink hair when she gives up her powers to save Undine.]] Their eyes also change into the same or similar color, which is why it's unusual that Kokoro/Heartful Punch has pink hair but ''blue'' eyes. [[spoiler:It was because she had been conceived while her mother Mitsuki [[TeenPregnancy was still a magical girl]] - the blue eyes come from her mother's powers, which left Mitsuki when she gave birth (signified by her hair color changing during a flashback montage).]]

* [[ShrinkingViolet Akane]] in ''LightNovel/{{Kampfer}}'' turns into a FieryRedhead in her Kämpfer form, Shizuku's normally black hair turns white on the underside and Mikoto's hair turns white.

** In the anime version, Ichigo's TransformationSequence, in addition to turning her into a CatGirl and giving her nice MagicalGirl clothes, changes her hair from dark red to pink, and the rest of the girls also have their hair colors changed to brighter shades.

** In addition to getting absurd hairstyles, Pretty Cures' hair get a lot brighter in color -- a great example is in ''Anime/HeartcatchPrettyCure''.

*** ''Anime/GoPrincessPrettyCure'': Haruka's orange-brown hair turns blonde with pink streaks as Cure Flora, and Towa's red hair changes to pink as Cure Scarlett. Downplayed with Minami/Cure Mermaid and Kirara/Cure Twinkle, whose hair colors brighten and gain differently-colored highlights but don't change color completely.
*** ''Anime/KirakiraPrecureALaMode'': Ichika's orange hair becomes magenta as Cure Whip, and Ciel's blonde hair becomes pink as Cure Parfait.
*** ''Anime/DeliciousPartyPrettyCure'': Yui and Ran both have brown hair, but their hair colors respectively change to pink and blonde as Cure Precious and Cure Yumyum. Amane's dark purple hair changes into blonde as Cure Finale.

** Yusaku’s blue and pink hair changes into yellow, red and pearl pink when he assumed Playmaker form.

* ''LightNovel/TheCombatBakerAndAutomatonWaitress'' has a {{Justified}} example in book 2 - [[RobotGirl Sven]]'s hair was designed as a radiator to vent excess heat, so releasing her PowerLimiters burns away the black hair dye she'd been using as a disguise, reverting it to its natural silver colour.
* ''LightNovel/TheDevilIsAPartTimer'': Emilia's hair turns white when she uses her "sacred power" abilities, which is basically [[HolyHandGrenade Holy Magic]]. There doesn't seem to be much of difference between it and regular magic in the series however [[MagicByAnyOtherName other than the name]].

* ''LightNovel/{{Slayers}}'': Lina's [[DangerousForbiddenTechnique Giga Slave]] puts a severe drain on her energy whenever she uses it and thus leaves her [[FieryRedhead red hair]] a platinum blonde that is so light it's almost silver for a day or so after she casts it. Not to mention that time it [[PowerGlows glowed golden]] because [[spoiler:the spell involved channelling the Lord of Nightmares, who replaced her soul when it backfired]].

* In ''VideoGame/TheLegendOfHeroesTrailsOfColdSteel'', whenever Rean uses [[SuperMode Spirit Unification]], his hair turns from black to white, his BattleAura is showing, and his eyes turn red. [[spoiler:After losing control of his power in ''III'' and starting the Great Twilight, he becomes trapped in an enhanced version with [[SupernaturalGoldEyes demonic eyes]]; once Class VII old and new manage to bring him back to his senses in the next game's Fragments chapter, he reverts back to his original Spirit Unification form sans Battle Aura and is trapped in that form for the rest of the game, the demonic form he had been trapped in becoming his new enhanced form.]]

* [[VideoGame/DragaliaLost Dragalia Lost]]: Euden’s [[spoiler: Bondforged Form has the lower end of his hair turn green.]]

* Yuu, the protagonist of ''Anime/MagicalAngelCreamyMami'', has blue hair in her normal form, and purple hair as her pop star alter ego, Creamy Mami.

* ''LightNovel/BofuriIDontWantToGetHurtSoIllMaxOutMyDefense'': Maple's black hair turns blonde when she transforms into an angel.

* In the ''Anime/FutariWaPrettyCure''/''WesternAnimation/TurningRed'' crossover fic, Miriam's red hair turns green when she becomes Cure Clover.

** His alternate universe counterpart Kale's hair also turns a green tinted gold, so it's likely in the nature of the transformation

* Happens two times for a Primagista performs in ''Anime/WacchaPriMagi'':

** Yusaku’s blue and pink hair changes to yellow, red and pearl pink when he assumed Playmaker form.

** There are some Primagistas undergo a complete change in appearance. Matsuri’s hair went from orange to hot pink and peach ombre with pastel blue streaks on her braid, while Amane’s hair went from light brown to dark red with silver streak as an accent. Jennifer’s pale green hair becomes yellow with pink and blue streaks.

* ''Anime/FlipFlappers'': The three main girls' hair colors turn drastically different when they enter their MagicalGirl forms; Cocona goes from dark bluot pink, Papika shifts from bright orange to cyan blue while [[spoiler:Yayaka's]] pink-streaked blond becomes neon green with lavender streaks.

* ''Anime/FlipFlappers'': The three main girls' hair colors turn drastically different when they enter their MagicalGirl forms; Cocona goes from dark bluot pink, Papika shifts from bright orange to cyan blue while [[spoiler:Yayaka[[spoiler:

* Variation: the wings of "Charcoal Feathers" in ''Anime/HaibaneRenmei'' slowly turn from light charcoal grey to inky black if [[spoiler:they become "sin bound" by doing poorly in their RedemptionQuest]].