"Make it blue!"Blue is a common color to represent femininity. Thus a girl or woman wearing blue is a sign that she is fair and gentle. This could have started at least as far back as ancient Greece and Rome, and why the Virgin Mary is often depicted in a blue robe. The logic was that blue symbolizes peace, serenity, kindness, and other such aspects that were considered womanly virtues. (In the Mediterranean, it was also a sign of high rank, as the dye/paint color had to come from indigo, woad, or lapis lazuli which must be imported from a great distance and was therefore quite expensive). From the early to mid 20th century, some argued that blue should be the color for girls, and red should be the color for boys. Yet even though we ended up with Pink Girl, Blue Boy after World War II, putting a woman in blue is still considered a sign of her femininity, if not as obvious as colors like pink and purple. Blue has other meanings, such as sadness and loneliness. These can overlap with this trope (as in representing both femininity and sadness). Or that she is gentle (with blue representing peace and serenity). This can apply to any feminine woman at any age, some more than others, like a Winter Royal Lady. A Sub-Trope of Tertiary Sexual Characteristics. A Sister Trope to Pink Means Feminine, Princesses Prefer Pink, Graceful Ladies Like Purple, Heavenly Blue. Compare Shy Blue-Haired Girl, Woman in White, Princess Classic. Contrast Lady in Red.
— Merryweather, Sleeping Beauty
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Anime & Manga
- Hikaru Makiba from UFO Robo Grendizer -one of the Mazinger Z series- was feminine, gentle and caring and wore a blue uniform. On contrast, her best friend, Maria was a tomboyish Tsundere and usually wore red or pink.
- Sailor Moon:
- Notably Sailor Neptune is color-coded with turquoise and blue. She is the Lipstick Lesbian in contrast to Sailor Uranus's butch. She's also a Cultured Warrior. Not to mention that her hair is blue too. Also references her elemental powers.
- Sailor Mercury is a demure Shrinking Violet who often acts as The Heart to her team - her hair and costume are blue. This is more pronounced in the live action where the character receives a Girliness Upgrade.
- Downplayed with Sailor Venus but still there. She's a Girly Bruiser who dreams of becoming an Idol Singer (and actually is one in the live action). Although her signature colour is orange, she has a blue bow on her costume. And her Sailor V costume is coded with a blue skirt.
- Undefeated Bahamut Chronicle: There is no way around it, blue is Krulcifer Einfolk's favorite color. All her dresses features blue in some way, blue is used to identify her in advertisements, even her eyes and hair are blue.
- Marnie from When Marnie Was There favors wearing blue dresses. Her style of dress could be foreshadowing to the fact she's not a modern day child. She is a sweet, outgoing Girly Girl in contrast to the shy and somewhat tomboyish Anna.
Films — Animation
- Princess Kida of Atlantis: The Lost Empire plays with this. She does indeed wear blue throughout the whole movie, and switches to a darker shade of blue at the end when she is crowned Queen. But then again Kida is a Tomboy Princess and all the other Atlanteans wear blue as well.
- Several outfits Barbie has worn have been blue, as well as several characters in the Direct-to-Video movies. Ro's standout dress in Barbie as the Island Princess is mostly blue, including part of the feathers on the peacock tail.
- Sally Carrera from Cars is portrayed as a light blue Porsche 911 Carrera. Other female blue cars include a racecar sponsoring RevNGo and the Queen of England.
- The princess in The Care Bears: Adventure in Wonderland has a light blue dress, though she's never seen wearing it (it's worn by Alice in training to impersonate her).
- This is perhaps the most common dress color for the Disney Princesses, even more than pink. The first three involve blue in their Pimped Out Dresses, while later ones more often use them in their non-fancy dresses.
- In Aladdin, Jasmine's main outfit is turquoise, a greenish shade of blue, accompanied by a blue jeweled headband.
- Belle's simple blue dress and white apron in Beauty and the Beast is perhaps the most familiar of her outfits aside from her golden ballroom gown.
- Brave: Merida has a turquoise silk dress as part of her royal attire, though she's more seen and much more comfortable with her dark green cotton one. This is likely being invoked by her mother, who resents Merida's tomboyish nature and wishes for her to be more ladylike.
- Cinderella's dress is only blue in products from the "Disney Princess" line. The dress is supposed to be silver (although the glass slippers were always blue tinted), but Digital Destruction caused her dress to become silvery-blue, a problem that still exists in the blu-ray releasenote . However, her nightgown was definitely blue. Her sweet and kindly Fairy Godmother also wears a blue dress.
- In Frozen, Queen Elsa pretty much wears exclusively blue dresses, save for the blue-green dress in Frozen Fever and her coronation attire. Princess Anna inverts this, as most of her dresses are green, save for the blue winter dress (paired with the pink cape and hat) she wears when trying to find Elsa. Elsa is regal and the "girly girl" to her sisters "tomboy". It also symbolizes loneliness as Elsa had been very aloof and distant from others most of her life due to fearing her powers. After Elsa breaks out of her shell she begins wearing a blue dress made of ice.
- In The Little Mermaid, Ariel wears a blue ribbon in her hair and a dress that is no less than three different shades of blue in the scene where Eric gives her a tour of his kingdom. Her dress at the end when Triton grants her wish and she emerges from the sea is a shimmering silvery-blue number.
- The dress Mulan wore to infiltrate the invaded palace, disguised as a courtesan. The rest of the men, disguising themselves as women, also wore blue dresses.
- Tiana briefly borrows a fancy blue dress in The Princess and the Frog. On a side note, since it took place in The Roaring '20s, that color would have been seen as more feminine than the rest of Charlotte's wardrobe.
- Sleeping Beauty played with this by making two of the fairies have a bit of a war over the color of Aurora's dress. It is blue for most of the movie, including the iconic kiss, despite being pink in merchandising.
- Snow White's dress, though mostly yellow, has a blue bodice and sleeves.
- Lady from Lady and the Tramp was given a blue collar. Her owner's son has an extremely pink wardrobe so the colors are probably in used in the older "Blue=Feminine, Pink=Masculine" way.
- The Blue Fairy from Pinocchio is dressed in blue.
- In 101 Dalmatians, Anita is usually seen wearing blue. Perdita, like Lady, wears a blue collar. In the animated movie, all her daughters have blue collars (In the live action film, the boys have blue, and it's mixed up in the TV show). In the series, Cadpig and Two-Tone both wear blue collars.
- In an inversion of Pink Girl, Blue Boy, Wendy Moira Angela Darling from Peter Pan is portrayed as wearing a long, blue nightgown with a blue hair ribbon, while her youngest brother Michael is portrayed as wearing pink footie pajamas.
- Miss Kitty (a female dancer/showgirl mouse) showgirl outfit in The Great Mouse Detective.
- The Ingenue Thumbelina from Thumbelina primarily wears a dress with a blue skirt.
Film — Live-Action
- In Ferris Bueller's Day Off, Sloane, the kinder and gentler of the two female leads, wears blue and white.
- In Pitch Perfect, the Bellas' primary color is blue (the other being yellow and white). Their uniform is a navy blue flight-attendant like attire, while The Leader's pitch pipe (which symbolizes her authority) is baby blue. This is to highlight their femininity and contrast with the all-male (and red clad) Treblemakers.
- Yvaine chooses a blue gown when she boards Captain Shakespeare's ship in Stardust and it also coincides with her and Tristan falling in love. She completes the image with a blue travelling cloak. Tristan's mother Princess Una also wears a blue dress - she's much nicer and calmer than her brothers.
- Bridget Jones is gentle-hearted and very girly, along with favoring blue in her wardrobe, which is likely chosen to match her eyes.
- In Cinderella (2015), Ella is color-coded with soft blues to emphasise her nurturing femininity. The beautiful dress she wears for the ball is of course blue as well. This is in stark contrast to the bold and loud colours her stepfamily wear. Her stepmother is occasionally shown wearing bold blue dresses, which makes perfect sense once it's revealed she was once similar to Ella, marrying for love and becoming bitter and cynical after her husband died - effectively making her a Foil for her stepdaughter.
- Ricki and the Flash has the titular Ricki donning a baby blue dress for her son's wedding. As she's a rock star who's usually seen in leather and jeans, she's a little uncomfortable at the change. But the dress marks her motherly side coming out a lot more, particularly as she reassures her depressed daughter Julie.
- Pauline - the most beautiful, charismatic and feminine of the Fossil sisters - wears a glamorous gown of royal blue to her film premiere in the 2007 film of Ballet Shoes. She's played by Emma Watson, which is hilarious if one looks at the Harry Potter example below.
- The Dark Knight Rises: In the ending, Selina Kyle wears a blue dress, as opposed to the black dresses she wore in previous scenes. It is meant to symbolize that she has left the Catwoman identity behind and has started a peaceful new life with Bruce Wayne.
- Dorothy Gale from The Wonderful Wizard of Oz (and especially in the film adaptation) is traditionally shown wearing a blue gingham dress. She's an empathic character who convinces all three of her True Companions to pursue their dreams and goals, and is also a Friend to All Living Things.
- Song at Dawn: When a lady wears blue it is consistently referred to as '(Virgin) Mary's color'. When the Arch Bishop sees Emerganda or Alienor wearing it he scoffs at the hypocrisy because (in his mind) they are anything but 'fair and gentle'.
- The Belgariad: Polgara the Sorceress, when not wearing gray wool travel garbs, prefers blue reserved for special occasions.
- Chalion: The Daughter's (or Lady of Spring's) color is blue, symbolizing youthful femininity, among other things.
- In Harry Potter and the Goblet of Fire has the Yule Ball, essentially the Hogwarts version of a High-School Dance. Hermione - who is best known for her bushy hair and no concern with her appearance - stuns everyone by pulling a She Cleans Up Nicely. The image is completed with a dress in periwinkle blue - showing that Hermione does have a girly side to her. But this is only in the book, as the dress is pink in the film.
- Game of Thrones: In Season 1, Sansa is seen wearing a romantic ice blue gown. In Season 6, she switches back to the mainly blue clothing like her mother used to do, which underlines her coming back to the North and the Northern ways.
- Although most Super Sentai/Power Rangers Blue Rangers are male, the few times they are female, this comes into play. True to trope rules, when the female Ranger is blue it's of a considerably lighter and softer shade than her male counterparts (with the notable exceptions of the very first female blue ranger, Choujuu Sentai Liveman's Blue Dolphin, who was more or less the same color as the previous blue rangers and the blue ranger from Ninja Sentai Kakuranger/Alien Rangers who wears a light cyan costume despite being male). Both canon female Blue Rangers, Tori and Madison, are very feminine characters. In Tori's case, she's The Chick and Madison is the Girly Girl contrasted with her Tomboy sister Vida (who ironically is the Pink Ranger).
- In Downton Abbey, Lady Sybil Crawley (later Branson) has many blue outfits, possibly to represent her role as the youngest and most innocent of the family and ultimately Too Good for This Sinful Earth.
- In Mad Men this is the Beauty focused and traditional Betty Draper Francis's favored color along with white, given how it highlights her Grace Kelly-esque beauty, Teutonic coloring (light skin, blonde hair, and blue eyes). Not only does it serve a purpose in highlighting her looks, it also highlights her role as housewife and mother.
- On an episode of  discussing male/female dynamics and oddities Stephen brought up that the Pink Girl, Blue Boy trope used to be reversed, as well as specific reasons why. The panelists seem quite stunned at just the sheer oddity of the reversal to the trope.
Stephen: For a long while, the colors would be pink for a baby boy, and blue for a baby girl.
Jack Dee: How did they get it wrong for so long?
- In Doctor Who, Clara Oswald, an introverted and lonely, but usually very compassionate and kind companion, is fond of wearing articles of clothing in various shades of blue. Given its sheer frequency throughout her entire run, it's probably her subconscious favourite colour. Outside of the original Clara, this habit even extends to some of her time paradox spawned doubles in different eras, especially the Victorian governess one. Possibly a symbol of loss too, as she lost her mother in her teens, which affected her rather profoundly. She's also occassionally seen in a predominant red or green from time to time, reflecting other sides of her personality. When she wears blue, she's mostly quiet and thoughtful, green-clad Clara is an adventurer, pragmatist and tends to be crankier, and wearing red clothing often coincides with her showing a 'cheery romantic dreamer' streak.
- Vocaloid: Hatsune Miku is the most well-known blue-color-scheme character (and the most well-known overall). Of the female Crypton characters, her official personality is the most traditionally feminine, in contrast to Rin (yellow), or the "cool" and mature Luka (pink) and Meiko (red). She is often used for songs that do not fit the "gentle feminine girl" theme, but in these cases, any art associated with the song usually changes her coloring to something darker or redder.
- Lucy Van Pelt of Peanuts usually wears a blue dress, although she's typically anything but "fair and gentle". She likes to think of herself as beautiful and adorable, though.
- When WSU became an all women's company, purple and blue became its primary colors, on the logo and the title belt plates, respectively. In this case they symbolized bruising more than grace or peace. When CZW took over the promotion was increasingly signified by pink, however.
- Bayley's first recognisable outfit was a light shade of baby blue, to reflect her innocence as The Ingenue. While she eventually wore more colours, she frequently has plenty of blue on her gear as well.
- Alexa Bliss in her Face incarnation was a cute 'Fairy Princess' who loved sparkles - making her one of the most feminine of the NXT women. Almost all of her outfits were blue, as were the graphics in her titantron. She also had blue tips in her hair. Notably when she underwent a Face–Heel Turn, her costumes and hair became red.
- As mentioned above, the Virgin Mary is often depicted dressed in blue. Another explanation for this convention is that medieval artists wanted to dress the Mother of God in the richest clothing they could think of, and ultramarine (which is made of ground-up lapis lazuli) was the most expensive dye. St. Peter is also usually shown dressed in blue, but usually a lighter shade (i.e. with little or no ultramarine in it) or in blue and orange-y yellow.
- Edward Albee's Tiny Alice has the Original Cast Precedent of Alice wearing blue. As theatre critic Otis L. Guernsey pointed out, though many people took this as symbolic, "nowhere does the Tiny Alice script specify that Miss Alice wear blue, though it does describe her boudoir as 'Feminine, but not frilly. Blues instead of pinks.'"
- The iconic glittering "good witch" gown that Glinda ultimately wears in Wicked (at least in the original production and its replicas) is pale blue – a change both from The Wonderful Wizard of Oz, where it's white, and the classic film, where it's pink.
- In Bioshock Infinite, Elizabeth at first wears a blue skirt with a white shirt that has blue details. She then changes into a long blue skirt and blue shrug (which are a replica of clothes Lady Comstock wore who also is an example of this trope). Here the blue symbolizes sadness, peace and isolation.
- In Fate/stay night, Saber (Arturia Pendragon) wears blue armor thus combining this trope with Lady of War.
- Rinoa in Final Fantasy VIII wears a blue coat, and is perhaps the most feminine of the female player characters (aside from Selphie, who is more perky).
- In Disney's Guilty Party, the matron Olivia Dickens wears a long blue evening dress as an ensemble with her white fur coat.
- Harvest Moon:
- Elli from Harvest Moon 64 is the granddaughter of Ellen from the first game. She is a gentle baker who wears a blue dress and apron. In all subsequent appearances, besides Harvest Moon: Tree of Tranquility, she is based on her Harvest Moon: Back to Nature appearance, who is now a nurse but keeps the same attire.
- Muffy from Harvest Moon: A Wonderful Life switches from her red dress to a more conservative, light blue dress when you marry her in the Playstation 2 version (Special Edition). She's the most stereotypically feminine of the bachelorettes, not really liking getting her hands dirty and wearing make-up.
- Aqua from Kingdom Hearts: Birth by Sleep. She has blue hair, matching blue eyes, wears blue in her outfit, and is graceful in battle and a motherly figure to the lost boys and Ventus.
- While the many incarnations of The Legend of Zelda's titular Zelda have run a gamut of colors over the series, her A Link to the Past incarnation dons a casual blue dress (though her princess attire is pink), and both her regal and traveling outfits in Breath of the Wild are predominately blue. Furthermore, she is also the bearer of the Triforce of Wisdom in a lot of entries in the series, which is usually associated with blue.
- Amitie Florian of Magical Girl Lyrical Nanoha A's Portable : The Gears of Destiny generally wears blue clothes that reflect her kind and friendly demeanor. It also matches well with her sister's very pink motif.
- Yurika Kirishima of Project Justice wears a bright blue dress, and is very clearly the most feminine character in her series.
- In Shining in the Darkness, the bodice of Princess Jessa's dress is blue.
- Rosalina from the Super Mario Bros. series primarily wears a Simple, yet Opulent cyan gown, which goes along with her elegant character.
- Alisa Bosconovitch of Tekken wears an outfit with blue flowers and blue jewels.
- Kitana from Mortal Kombat II (and all subsequent appearances) wears blue, has from her very first appearance. The only times she hasn't has been in the film, where she wears a dark bluish/black outfit, and her Dark Empress skin from Mortal Kombat X, which is also a blackish-navy blue color.
- Posthumous Character Maria Robotnik from Sonic the Hedgehog wore a blue dress, blue shoes, and a blue headband. She was a sweet, Friend to All Living Things Ill Girl who had a sibling-esque relationship with Shadow. It's possible that her blue attire is supposed to date her, as she died 50 years ago, though what this means in the series is unknown (her flashbacks are very technologically advanced compared to the real 1950s so it's unknown if the Sonic series takes place 20 Minutes into the Future or if their world is just advanced).
- In Alice and the Nightmare, kind and quiet Edith wears blue and has blue as her Suit's colour.
- In the Dudley Do-Right cartoons, Nell wears a blue dress. She is an innocent girl and frequent damsel in distress.
- Sarah Phillips from Liberty's Kids.
- Charlotte of Making Fiends is completely blue. Her skin, eyes, clothes and hair are all blue. She's the epitome of a Cheerful Child.
- Bubbles of The Powerpuff Girls, the girliest of them, is color-coded with a blue dress.
- While in the comics she wears a variety of clothes, the sweet and feminine Sabrina in Sabrina and The Groovie Goolies mainly wears a blue dress.
- Princess Sally Acorn of Sonic SatAM media wears blue boots and vest. She's feminine, but strong, even giving (G-rated) cusses to Robotnik.
- Steven Universe:
- Lapis Lazuli combines this with Amazing Technicolor Population- not only is she featured wearing a skirt and top in shades of blue, but her hair, eyes, and even skin are shades of blue as well. Along with Rose Quartz and Sapphire she's the only Gem thus far whose primary outfit features a long skirt.
- Sapphire, as well, who is the Girly Girl to Ruby's Tomboy. And like Lapis, she also combines it with blue skin and hair (though Sapphire does have patches of white in her outfit.)
- My Little Pony: Friendship Is Magic:
- Sparkles in The Grossery Gang webseries is a light blue soda can, while also being the only girl of the team. While she's a bit more rough-and-tumble and sarcastic than most girls, she has the most tact and sympathy for others out of the gang as well, acting like a big sister to Egghead, while also being the grounding force to Pizza Face's riskier ventures.