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Anime and Manga
- Ichigo Kurosaki from Bleach zigzags between this and Red Is Heroic. His spirit pressure in his normal Shinigami stage has a light blue color, as well as his Getsuga Tenshou technique. When he activates his Bankai, however, it turns black and red. However, when he activates his Final Getsuga Tenshou, it turns black and blue.
- Death Note has L as a Hero Antagonist version of this trope. L is usually associated with the blue color, while Light Yagami is associated with red. This usually represented in the lighting they get.
- Most of the heroes from the Dragon Ball franchise usually portray their Ki Manipulation with this color (Although occasionally some studios have used yellow instead). The most iconic examples, the legendary Kame Hame Ha wave, which is always this color, as well as the Spirit Bomb.
- Saber, from the Fate/stay night franchise. She wears a blue Battle Ballgown. The Visual Novel also usually depict her attacks with blue Sword Lines (as seen in the trope image). The ufotable anime adaptation of Fate/Zero, as well as the upcoming remake of the original Stay Night, also feature that. (The exception would be the Excalibur attack, which power is symbolized by a golden light.)
- Blue and red are the heroes' favorite colors in the Mazinger universe:
- Mazinger Z: The arms, legs and head of the titular Humongous Mecha are blue. Diana-A was the second robot of Sayaka Yumi -the main heroine-. Its whole body was colored with different shades of blue (and its pilot is calmer, more prudent and more kind-hearted than Mazinger's pilot).
- Great Mazinger, UFO Robo Grendizer, Mazinkaiser and Minerva-X keep Mazinger's blue color scheme.
- And in UFO Robo Grendizer, the main character wore a red-and-blue costume. Koji Kabuto and Hikaru Makiba also wore blue suits. Maria was the only that wore red, but her mecha was mostly blue.
- Played with in Naruto with Sasuke Uchiha. Before the Time Skip, he was usually associated with blue due to his costume. However, after his Face–Heel Turn, he drops that color almost completely. Even when he gets his most powerful attacks, his Chakra turns purple..
- Shinji Ikari, the main protagonist from Neon Genesis Evangelion, whose pilot suit is blue in contrast with the other pilots (white for Rei, red for Asuka, black for Kaworu and pink for Mari).
- Kenshin Himura is usually portrayed in an Unnaturally Blue Lighting when he's executing his techniques, while his opponents do in different colors.
- Seiya from Saint Seiya, whose Cosmos and attacks all glow in this color. The Pegasus armor usually gets a blue hue as well, which is specially prominent in the manga. The anime tends to go for a Primary-Color Champion by mixing with some red clothes under the armor and some yellow ornaments.
- Science Ninja Team Gatchaman:
- Ken, the team leader, wears sky-blue gloves, boots and belt.
- Joe, his second-in-command, wears a dark-blue cloak and blue gloves and boots.
- Simon, main character of Tengen Toppa Gurren Lagann, whose clothes are prominently blue. Including his hair and his eyes for good measure.
- Batman sometimes has a blue batsuit (especially the cape and cowl) in some iterations. He tends to be more... stable, when he's depicted in that one (albeit not always).
- Despite his name, Black Lightning's costume sports a dark blue costume with prominent bright blue trims.
- Captain America. Albeit his costume is supposed to represent the American flag, blue is by far the most prominent color. This helps to drive home his straight leadership in The Avengers.
- His fellow Avenger Hawkeye even wears a combination of blue and (royal?) purple, but does not that often appear in a leadership role.
- The Fantastic Four. Full stop. All four of them wear iconic blue skin-tight jump suits. They started out with sky blue suits offset by black gloves and boots, under John Byrne the got dark blue (almost black) suits with white gloves and boots, and from then on the look changed again now and then.
- A-Bomb, Rick Jones's mutated form, resembles the Hulk villain Abomination with the exception of being colored blue. Though he resembles the Abomination, A-Bomb is more heroic than his green colored villainous counterpart and is an ally of Hulk.
- Miracleman, AKA Marvelman. Partly because he was originally a Captain Ersatz of superhero Captain Marvel, and by extension, an Expy of Superman.
- Nightwing's traditional costume uses a prominent blue trim, symbolizing his more level-headed attitude in comparison to Batman.
- Spider-Man has a largely blue costume, although the shade changed over time. In his very first appearance in Amazing Fantasy the costume was more red and black, but soon after the black (with blue highlights) became blue (with black shading). It should be noted that in his darker days, he has been known to wear a black costume to reflect just how mean he's gonna get.
- As part of his Primary-Color Champion status, Superman's suit is prominently blue. Specially after the New 52, where he dropped the red underwear. Although the big red cape is just as prominent, the blue suit conveys more Superman's gentle and kind nature. A Fan Nickname for Superman is "The Big Blue Boyscout".
- Dr. Manhattan, from Watchmen, is a pretty unique tragic, borderline Anti-Hero example.
- Cyclops, the team leader of the X-Men, is usually depicted in a blue spandex in more modern versions. Another iconic example in the same series would be the Beast, with his blue fur, which matches his intelligence and kind nature. Iceman has been known to wear white-sky blue combinations, and one of Jean Grey's least-loved costumes was the blue-orange combo she got from Jim Lee.
- Evangelion 303: Rei's war plane is blue.
- HERZ: During the story Rei gets a new Humongous Mecha, Unit 00-II. Right like its predecessor, it got painted blue.
- Last Child of Krypton: In this crossover Shinji Ikari is Superman and wears his iconic blue outfit.
- Superwomen of Eva 2: Lone Heir of Krypton: Asuka’s Supergirl costume is mostly blue.
Film - Live Action
- The Noble Savage Humanoid Aliens Na'vi from Avatar are blue skinned.
- Zig-zagged in Jurassic World with Blue the Velociraptor. Blue has a blue color scheme, but isn't exactly heroic. However, that's because of her and her sisters' natural predatory instincts, not out of pure evilness. Blue and her sisters turn on the humans, but don't try to hurt Owen. And when confronted with the I. rex, she and her sisters fight it off to protect Owen.
- The Master of Disguise subverts this, as it's actually the villainous Devlin Bowman whose surroundings are often lit with blue lighting, and he wears blue shirts under his white suits. Word Of God was that this was a stylistic choice to have seens with Bowman feel cold and menacing (as opposed to the Disguiseys' world which had lots of warmer colors like red and gold).
- Probably the most iconic example in the medium is the blue lightsaber from the Star Wars series, usually associated with the Jedi, in contrast with red lightsabers for the Sith. With the exception of Return of the Jedi, when green was used instead due to technical difficultiesnote , the main heroes have always used a blue one more often than not.
- Played with in the prequel trilogy with the the laser beams from the Clone army, and during the Anakin Vs Obi-Wan duel. Considering how blue is used prominently as the color of good in this series, this helps to establish the morally messed-up situation of the Clone Wars. Especially in the duel.
Film - Animation
- Played with in Wreckit Ralph. Fix-it Felix Jr., the Adorkable Nice Guy is dressed all in blue, in opposition to Ralph's red. In the "Fix-It Felix" game, they're The Hero and the Big Bad respectively. However, the story of the movie itself is about Ralph trying to move away from his role as a villain and trying to become a hero of his own. Felix, on the other hand, moves to a Lancer role, but without loosing any of his heroic traits.
- The sword Sting from The Hobbit and The Lord of the Rings, which glows blue when orcs are nearby. It was wielded by the main protagonists of both books. And of course, this was carried over to the film adaptations.
- Several of the protagonist engines from The Railway Series and its Animated Adaptation, Thomas the Tank Engine are painted blue, including Thomas himself, Edward, and Gordon.
- The Windrunner Radiants of The Stormlight Archive have blue Tron Lines on their armor and weapons, and their eyes turn blue if they've used their powers recently.
- House Kholin, the most heroic of the ten Alethi princedoms, has blue and silver as their colors.
Live Action TV
- Batman, in his TV series days, was definitely on the bluer end of grey. Not in vain, this is one of the... happier... versions of the character.
- In Star Trek: The Original Series, Spock and McCoy wear blue. In Spock's case, it probably represents his coolness and rationality, while for McCoy, it signifies his gentleness and kindness.
- The heroic god Vishnu and his avatars from Hindu Mythology are blue skinned.
- In Warhammer 40,000:
- The Ultramarines, lauded as the most honorable of Space Marine Chapters, have — guess — ultramarine shade of blue as their primary color.
- Inverted with Tzeentch, whose main color is blue and who's a Smug Snake-esque God of Evil.
- The World Eaters, now feared as a force of Ax-Crazy Blood Knight berserkers, used to be gray-blue before their Face–Heel Turn. Their armor is now entirely red and brass, the colors of the Blood God Khorne.
- The Space Wolves, among the most heroic (by modern standards) Chapters, have armor that's somewhere between light blue and grey.
- The Knights of Justice◊ from Black Moon Chronicles use blue everywhere, to the point where they all use You Gotta Have Blue Hair in a Medieval European Fantasy.
- Kasumi, main heroine of the Dead or Alive franchise. Her most iconic outfit is a blue kimono.
- Elsword: Chung, one of the playable characters, is color coded with blue, and unlike the main protagonist Elsword, Chung is more heroic, noble and innnocent (being a prince helps).
- Cloud Strife, from Final Fantasy VII displays a blue Battle Aura in the compilation works.
- The Fire Emblem series. With a couple of exceptions, the main protagonist is always depicted with a distinguishable blue hair, with blue clothes to boot.
- Guilty Gear: Ky Kiske is primarily associated with blue and he's the more straight-up heroic (to a fault) out of the two main protagonists.
- In Highborn, the Highborn army and buildings they control are blue. It's even Lampshaded by some of the characters, who occasionally say something to the effect of "Oh, he's blue, so he's on the Highborn side". When you play as the Decay in the third chapter, they become blue and the enemy Highborn become red instead.
- In the world of League of Legends, the two most important nations are Noxus and Demacia. Noxians, who wear red, value strength in any form and see brutal ambition as positive thing. Demacians value justice, benevolence and selflessness. They wear blue.
- Though he's associated mostly with green, Link from the The Legend of Zelda series usually gets blue as a prominent secondary color by the Master Sword, whose hilt is purplish-blue, and all his forms of Sword Lines, Sword Beam and such, light blue. Also, the Hylian Shield.
- Mega Man, also known as the "Blue Bomber" because of the color of his body, which is mostly blue. Same goes through his other incarnations in the Sequel Series. Notably, they always tend to be innocent or noble-minded in contrast to other characters, although it never stops them from getting stronger.
- Downplayed in Mega Man Star Force, where Omega-Xis (the Mega Man incarnation of the series) had more selfish motives, at least at first, and he seems to be quite a brash Blood Knight.
- Subverted in Mega Man Zero: The hero Zero is red, and the Big Bad Copy X is blue (and the antithesis of real X in almost every way).
- Solid Snake from the Metal Gear series. His sneaking suits are usually dark greyish-blue, specially in Metal Gear Solid and Metal Gear Solid 2: Sons of Liberty.
- Beck from Mighty No. 9 has a predominant color of blue in his color scheme partly due to being the Spiritual Successor of Mega Man.
- The main hero from Persona3 is associated with dark blue.
- In PlanetSide 1, the New Conglomerate freedom fighters deck out all their equipment in blue trimmed with gold highlights. In comparison, the oppressive Terran Republic has black and red equipment and the fanatical Precursors-worshiping Vanu Sovereignty uses purple and cyan. Averted in the sequel which trends towards Grey and Gray Morality, where the NC are backed by Mega Corps and Private Military Contractors only in it for the profit margins, and the Terran Republic is a democracy forced into drastic measures.
- Sparkster, the main protagonist of the Rocket Knight Adventures series, has a light blue armor which is put in contrast with his Evil Counterpart, Axel Gear, who wears a suit of dark purple armor (Red in the 2010 game, Rocket Knight), as well as the green armor of Emperor Devligus Devotindos' Pig Soldiers in the original game, and the purple armor of King Gedol's Lizard soldiers in the Genesis sequel, Sparkster: Rocket Knight Adventures 2.
- Sonic the Hedgehog. His blueness represents freedom and clear blue skies, as well as his generally easygoing nature. This is put in contrast with Eggman's redness as well as Knuckles' intense red and Shadow's red accents.
- Raynor's Raiders in the Starcraft games are blue-armored (in the first one. You sometimes play as the red Sons of Korhal, but go back to blue once you leave them after their Face–Heel Turn).
- Enter The Daelaam, the whole Protoss Fleet in StarCraft II: Legacy of the Void where you are permanently blue in the bulk of the entire campaign fighting the forces of Amon.
- Ditto to their allies, the Terran Dominion and the Kerrigan-controlled Swarm are sky blue and indigo respectively.
- Enter The Daelaam, the whole Protoss Fleet in StarCraft II: Legacy of the Void where you are permanently blue in the bulk of the entire campaign fighting the forces of Amon.
- The Alliance campaign of Warcraft III gives you blue-armored units (unlike Warcraft II and Starcraft, there are no faction-specific colors).
- The generally-heroic Ultramarines of Warhammer 40K, as their name indicates, have blue armor. To a lesser extent, the Space Wolves (who use grey-blue) who are more Chaotic Good.
- Shulk from Xenoblade, by the blue Laser Blade of the Monado (both the original and the replica) and, specially, the intense blue glow of his eyes each time he has a vision of the future. This eye glow eventually evolves into a full-fledged blue Battle Aura.
- Ben Remmy from Facade. His whole body is blue.
- Superman. While he does have the red cape to signify "action", his costume is predominantly blue. In the intro to Justice League Unlimited, the background for Superman's card is blue. He's usually the voice of reason, especially when paired with Batman (dark red background), or even Wonder Woman, who wears a blue cape over her predominantly red costume.
- Both played straight and subverted on Action League Now. The Chief, the leader of the Action League, wears a dark blue suit, while The Mayor, the series' main villain, wears a light blue suit.
- Finn of Adventure Time wears a light blue shirt and dark blue pants. Although he definitely has the sense of righteousness, his personality is pretty much the opposite of "calm".
- Used to full effect in the Grand Finale of Avatar The Last Airbender. The scene where Aang takes Fire Lord Ozai's bending away, both enter in a Throat Light state, being Aang's light blue and Ozai's red.
- Also, both here and in its Sequel Series The Legend of Korra, where the Avatar enters the Avatar State, their eyes glow light-blue. It was explained in Book 2: Spirits that this is the manifestation of Raava, the Spirit of Light, who is this color in opposition of Vaatu, the Spirit of Darkness, who is dark red.
- Downplayed with Blooregard "Bloo" Q. Kazoo, Mac's small, light blue imaginary friend on Fosters Home For Imaginary Friends. While he is still one of the show's main protagonists, he is extremely selfish, rude, and arrogant, often falling into Designated Hero territory. He seems to take a level in jerkass with every passing episode, to the point where he acts like a Hero Antagonist in several of them. Still, he has a few Jerk with a Heart of Gold moments, namely when he feels remorse for his actions and apologizes for whatever he's done.
- Bubbles from The Powerpuff Girls wears a light blue dress. She is the sweetest and nicest of the three girls, and typically acts as if she were the youngest, despite the fact that there is no age gap between her and her sisters. However, as proven in the episode, "Bubblevicious", taunting her and calling her the smallest and the weakest is an easy way to get on her bad side.
- In Rugrats, Tommy Pickles, the unofficial leader of the babies, is usually seen wearing a light blue shirt. As part of his Primary-Color Champion status, his Cowardly Sidekick best friend, Chuckie Finster, wears a light blue shirt with a yellow and red Saturn on it.
- Leonardo, the leader of the Teenage Mutant Ninja Turtles. His blue bandana is indicative of his calmness, spirituality and reliability.
- Buster Bunny, the main protagonist of Tiny Toon Adventures, has light blue fur. He's generally The Leader and The Straight Man to the more wacky characters he deals with, though he can get wacky himself, too, considering the character on whom he's based.
- The Dinosaucers all wear shades of blue and green in their armor, to contrast with the Tyrannos and their villainous red and orange.
- In Supernoobs Tyler's hair becomes blue when he puts on his battle armor.
- The Trope Codifier is probably the wargame Kriegsspiel, which was developed as a teaching tool for Prussian army officers. Since the color of the Prussian uniforms was blue, it became the default color for friendly units and red the color for hostiles.
- Americans portraying themselves as heroes in the Cold War will have the United States represented by blue mostly due to the Soviet Union officially using red to represent itself (red being the color of communism and all.)
- A lot of police forces around the world choose some shade of blue as the primary color for their uniforms.
- This dates back to the founding of the Metropolitan Police in London. There was a huge public opposition to having a government controlled force of men on the streets. In one of the earliest experiments with PR, the uniforms were designed to be Navy blue instead of Army green, which had the connotations of a defensive force rather than an occupying army.
- In Spanish, there's the term príncipe azul. It literally means "blue prince," but it's often used to mean "knight in shining armor" or "prince charming."
- Italian language has an equivalent of this expression: "principe azzurro".