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* [[TransformersGeneration1 Transformers Generation 1]]. Blaster is loud, outgoing, spontaneous (and red) while Soundwave is quiet, introverted, and calculating (and blue).
** Jazz (Red) and Prowl (Blue) also count in some continuities, especially in the IDW comics and TransformersAnimated.
** [[color:#ff0000:Starscream]], the gung-ho backstabber, with [[color:#0000ff:Thundercracker]], the more reluctant henchman.
** Galvatron, the [[AxCrazy psychotic]], [[MoodSwinger unpredictable]] [[BadBoss Decepticon leader]] is the red to his most [[UndyingLoyalty loyal]], [[TheStoic calmer and patient]] lieutenant, Cyclonus' blue.
** An (almost) literal contrast in 80's animated film WesternAnimation/TransformersTheMovie: Hot Rod, impulsive and flame-themed (well, his name is a hint), is red (in a color tone tending a bit to magenta). Kup, calmer and more experient, is greyish blue (or blueish gray).
** Also in Transformers' eyes. The wild, violent Decepticon have red eyes; The good-hearted, rigtheous Autobots have blue eyes.
* ''WesternAnimation/TeenTitans'' has two sets: [[BadassNormal Robin]] and [[GenkiGirl Starfire]] are represented by Red and are more brash, stubborn, and passionate than the others (Starfire displays this most in the [[Comicbook/TeenTitans comics]], to which the flashback/origin episode "Go" paid tribute). [[GeniusBruiser Cyborg]] and [[DarkMagicalGirl Raven]] are represented by Blue and are more intelligent, analytical, and, in Raven's case, cold.
** That, when they are in combat, but when they just hang along, Starfire and Beast Boy are more on the Red side, due to the fact that they are almost always happy, laid-back, and carefree, while Raven and Robin have blue traits, being controlled, calm, and down to earth. Cyborg falls in the middle.
** In the current ''Comicbook/TeenTitans'' comic, Red Devil (literally a Red Oni) and the new BlueBeetle have become a comic relief dynamic duo that fans have dubbed Beevil. While both characters have similar personalities, Beetle tends to be level headed while Devil is more impulsive.
** Don't forget about Thunder (blue) and Lightning (red).
** Slade is definitely the villainous Blue to Robin's heroic Red.
* ''WesternAnimation/AvatarTheLastAirbender'' has played with the red vs. blue color game quite a bit. Probably the most clear cut case for this in actual characters is the contrast of angry, defiant {{Determinator}} Zuko, who lives and dies with the IndyPloy (although he is by far one of most complex reds), and the DangerouslyGenreSavvy [[TheChessmaster Chessmaster]]/[[TheDragon Dragon]] Azula, who even makes blue fire (which is actually hotter). Some other notable examples of playing with red vs blue include:
** Zuko's DreamSequence, where his [[TheObiWan Uncle Iroh]] is represented by a red dragon and Azula by a blue one.
** Best friends [[RivalTurnedEvil turned enemies]] Avatar Roku and Firelord Sozin both had dragon companions. Roku's was red, Sozin's blue. [[spoiler:Sozin tricks Roku, leaving him to his death.]]
** Zuko also plays Red Oni to every one of Team Avatar's Blue Oni's (except for Toph).
*** Aang and Zuko are taught a different version of Firebending philosophy, formed, at least in part, by a red and blue dragon. Zuko is being taught to move beyond destructive motivations (his red oni background) while Aang is being taught to accept his destructive potential (against his blue oni background). Also the contrast in their facial markings. Zuko's Red Scar and Aang's Blue Tattoos.
*** Zuko and Katara in general Zuko is angry and passionate while Katara is caring and nurturing, however in the interactions between just the two of them, they switch roles. Katara is constantly angry and emotional and extremely protective of Aang and her own interests. Zuko is calm and thinks about how to deal with her. Katara is typically dressed in blue and Zuko in red.
**** Except, of course, in each of their 'spirit' alter-egoes: the ''Blue'' Spirit and Katara's reddish Painted Lady. In that commonality, their color schemes reverse.
*** During the Boiling Rock infiltration Sokka was the Blue Oni, A non bender Water Tribesmen strategist and TheLeader vs Zuko's Red, a Firebending Fire Nation fighter and TheLancer.
** Aang is, appropriately enough, a combination of the two. Aang normally can be both foolish and passionate (represented by his normal saffron clothes [[spoiler:and temporary Fire Nation wardrobe change, which he later salvages to make a new set of robes]]). But when in his glowing blue Avatar State, Aang can become frighteningly cold and ruthless, to the point where Aang himself has nightmares about it.
** More broadly, this applies to the Fire Nation and Water Tribe. Fire Nation are typically dressed in red (and black) compared to the Water Tribe, who are typically dressed in blue (and white or gray). Firebeinding is offensive, Waterbending is mostly defensive.
*** In terms of personality this is inverted in the case of [[TheGift the vastly gifted]] [[MissingMom motherless]] young daughters of important leaders on the opposing sides. Katara a passionate and somewhat impulsive TeamMom whose will sabotage her own plans to help people in need, while Azula is a calculating manipulator who has a hard time dealing with people on a personal level at all.
*** The Siege of the North - the Fire Nation troops are the aggressive attackers whose deluded military leaders (General Zhao and Prince Zuko) are busy with insane schemes ([[spoiler:to kill the Moon spirit]] and capture the avatar respectively). Meanwhile, the Northern Water Tribe are defending themselves, planning to infiltrate the Fire Nation navy]] and seek help from the spirit world. The color scheme throughout those episodes fits this trope to a t - the moon and night sky become blood red when [[spoiler:the Fire Nation Admiral Zhao begins to kill the Moon Spirit]], foolishly risking the destruction of the earth in order to prevent water benders from bending, thereby making the city an easy target. The response from the Northern Water Tribe is exceptionally non-aggressive, [[spoiler:as the princess, something of an incarnate of the Moon Spirit, sacrifices her mortal life]] with the aim of restoring balance to the world and enabling others to fight against Fire Nation imperialism.
*** Also, the ([[ColorCodedForYourConvenience red]]) Fire Nation and the (green, not blue) Earth Kingdom during [[spoiler:the attacks and sieges of Ba Sing Se]] and the establishment of Fire Nation colonies, where the Fire Nation are pretty clearly the (unsustainably) aggressive party. Of course, the Earth Kingdom has the Dai Li, who dress in cooler colors and [[spoiler:engage in more underhanded aggression, like brainwashing]].
** Its sequel series, ''WesternAnimation/TheLegendOfKorra'', features hero Korra and her [[TheLancer lancer]] Mako [[spoiler:who also double as the OfficialCouple]] as this trope. Their ChromaticArrangement is the opposite of their oni; Korra, the Avatar, is a hotheaded native waterbender, and Mako is a cool and controlled firebender.
** In season 2, Varrick and his quiet assistant Zhu Li played very straightly. Also Desna and Eska count, Eska becomes a rather terrifying Red (matching or even more scarier than Azula), while Desna plays a submissive and somewhat more understanding Blue twin.
* Although, at first, Stan and Kyle from ''WesternAnimation/SouthPark'' had similar personalities, later on, they were differenced. Stan was an introvert, calm DeadpanSnarker, while Kyle was an impulsive, bold HotBlooded SnarkKnight, especially in Cartman's presence.
** Tweek and Craig fit this trope, as well. The former is hyperactive, paranoiac and anxious, who shows his emotions easily, while the latter has a darker personality, being stoic, pragmatic, monotonic, and ironic.
* Possibly unintentional, but Blitzwing of ''TransformersAnimated'' has a SplitPersonality represented by his three faces. The black face is TheMadHatter, but the red and blue faces are textbook red and blue oni: the blue face is cold, calm, and calculating (and uses ice powers), while the red face is brash, impatient, and agressive (and uses a flamethrower).
** Even his alternate modes reflect this; the blue face wanted to choose a fighter jet, maneuverable and good for attacking from a distance, while the red face insisted on an assault tank, heavily armored and bristling with firepower, ideal for being right in the middle of the action. After they'd argued for a bit, the crazy face stepped in and, cackling madly, scanned both; which one he uses depends on which of him is driving.
** Interestingly, while you'd expect [[WesternAnimation/TransformersAnimated Jetfire and Jetstorm]] to follow the trope (they even have red and blue color schemes, respectively), they avert the trope by both acting pretty red. Of course, they are working for [[{{Jerkass}} Sentinel Prime]], so who knows how that affects their personalities.
** Sentinel Prime is the red who is reckless and an arrogant jerk, Optimus Prime is blue, being far more level-headed and humble to everyone. Ironically, Sentinel's primary color is blue, while Optimus' is red.
** Then there's Bumblebee, who's HotBlooded, and Prowl, who is more mature and more experience in fighting.
* ''WesternAnimation/SWATKats'': Chance 'T-Bone' Furlong and Jake 'Razor' Clawson. And when they're seen outside their vigilante and work clothes, they're wearing their respective colors.
* Sparx the red monkey and Gibson the blue monkey from ''WesternAnimation/SuperRobotMonkeyTeamHyperForceGo!''.
* In ''WesternAnimation/JusticeLeague'', Hawk and Dove, who are also [[SiblingYinYang brothers]], [[spoiler:then one brother and a girl, then two girls, according to the DC Encyclopedia.]]
* In ''WesternAnimation/XiaolinShowdown'', good examples on the villain side are Jack Spicer (red) and Chase Young (blue).
** Good examples on the heroes side are Omi/Kimiko (red) and Raimundo/Clay (blue).
* Leonardo (blue) and Raphael (red) in ''Franchise/TeenageMutantNinjaTurtles''. Reversal in that Leo is the leader of the team (aside from [[OldMaster Splinter]]). Raph does the BloodKnight bit when he takes the guise of [[spoiler: Nightwatcher]] in the CGI movie.
** In fact, they pretty much summed up the trope in four words with this exchange from the first episode of the [[WesternAnimation/TeenageMutantNinjaTurtles2003 '03 series]]:
-->'''Raph:''' Teacher's pet!
-->'''Leo:''' Ninja dropout!
** Even the other two turtles, Donatello & Michelangelo, fit this trope. Michelangelo being the wild, extroverted, and more emotional Red to Donatello's calm, introverted, and more logical Blue.
* Inverted with Pablo and Tyrone of ''TheBackyardigans'': Pablo's blue, hot headed, and panicked a lot in season 1, placing him as the Red Oni. Orange-furred Tyrone, on the other hand, is calmer and more level-headed, which are true aspects of a Blue Oni.
* In the cartoons series for Disney's ''Disney/{{Hercules}}'', Ares the God of war and Athena the Goddess of wisdom, who were siblings and rivals, were perfect representations of this trope.
** The crossover between Aladdin has Jafar and Hades under these with their colors.
* ''WesternAnimation/AladdinTheSeries'': [[TheHero Aladdin]]: red/purple and white, uses his own strength, lives with a mess of friends, has a monkey sidekick, versus [[DracoInLeatherPants Mozenrath]]: dark blue and black, uses magic, lives alone in a ghost city, has an eel sidekick.
* In ''TazMania'' the Taz/Dingo shorts, Taz plays the role of the HotBlooded red oni while Digeri Dingo plays the role of the cool and cunning blue oni. Also, Molly and Jake, with Molly being the easily-stressed red and Jake being the more cheerful blue.
* In ''WesternAnimation/{{Bonkers}}'', Bonkers (red) and detectives Lucky Piquel and Miranda (blue).
* In ''InvaderZim'', Gir seems to show some signs of this trope, though the colors are reversed. The first few seconds when he was active, the episode "Gir goes Crazy and Stuff", and occasionally through-out the series, Gir's colors switch from blue to red and back again. When red, he seems to show the traits of the Blue oni and is intelligent, calm, and eager to serve his master (often saying "Yes my Master!"). When Blue, he acts more like the Red Oni and is wild and over the top, with no control over his own urges or actions.
** There is also the scene were Zim hypnotises Dib and the scene shows the ground falling apart with Zim in red and Dib in blue. Makes sense, since Zim is known for being impulsive and not thinking before acting, where as Dib is more scientific and logical (if only by a little bit).
* Corneil (blue) and Bernie (red) from ''WatchMyChops''.
* Dagget (red oni) from ''AngryBeavers'' is highly emotional and prone to DonaldDuck-esque rages; stark contrast to his older brother, Norbert (blue oni), who is cool-headed and considers himself suave.
* Trevor and Aeon from ''WesternAnimation/AeonFlux''. Subverted, in that Aeon, despite being a cool, calculating, cause-oriented Blue Oni, is meant to represent chaos and anarchy, whereas Trevor, the vain, arrogant, people-oriented Red Oni, represents order and stability.
* Out of the stretchy superheroes in ''WesternAnimation/BatmanTheBraveAndTheBold'', ComicBook/PlasticMan, who wears red, is much more blunt and okay with stealing valuables from the scene of the crime, while Elongated Man, who wears purple (it's a kind of blue) is much more analytical and noble. Plas has a similar dynamic with Batman himself.
** Likewise, Batman (Blue) and Comicbook/{{Aquaman}} (Red), Atom (Blue) and Aquaman (Red), heck, ''anyone'' and Aquaman.
* In ''WesternAnimation/TitanMaximum'', the original Titan Force Five had the HotBlooded Palmer and his [[TheLancer Lancer]] Gibbs (they even wear red and blue respectively). However, the fact that Gibbs was the OnlySaneMan of the team (as well as Palmer leaving him to die just so he wouldn't miss a hot date) led to Gibbs turning evil in the first episode.
* ''WesternAnimation/TheAmazingChanAndTheChanClan'' has two examples, one with an inversion in color: sweet-tempered Suzie wears blue while boisterous tomboy Anne has a lot of orange in her outfit, but responsible Henry wears orange while impulsive goofball Stanley wears blue and green.
* One episode ("Alter Ego") of the 1970's era Filmation ''Sabrina, Superwitch'' cartoon featured Damina, a raven-haired Sabrina lookalike with a shrill, grating voice. Depending on who you ask, Damina is Sabrina's "magical mirror image," Sabrina's alter ego, or merely Sabrina's cousin, but what is clear is that she and Sabrina are literal examples of the trope; the rowdy and rambunctious Damina wore a red dress, and the demure and proper Sabrina wore a blue dress.
* Henry and June in ''WesternAnimation/KaBlam'': Henry is the red oni (he's energetic, idiotic (not to extreme levels)), while June is the blue oni (cool, cynical, smart). With June, it kind of makes some sense: she does have blue hair, after all.
** Ironically, Henry wears a blue shirt, where as June wears a red jacket.
** In ''Life with Loopy'', Loopy is the red oni (energetic, life-loving) to her older brother Larry's blue oni (inteligent, shy). Oddly enough, the colors of their hair are the opposite (Loopy has blue hair, Larry has red).
* The Mooninites from ''WesternAnimation/AquaTeenHungerForce''. While they are both still immature jerks, Ignignot is much more level-headed and sarcastic than the vulgar, in-your-face Err.
** the Plutonians also follow this, with loud, dictative, and stubborn Oglethorpe, and calm, easy going, and sensible Emory
** Among the main characters, Master Shake is definitely red; Meatwad can be red or blue depending on circumstances or pairing; and Frylock is generally blue.
* WesternAnimation/BeavisAndButthead are a borderline case. While both of the boys are active pranksters and neither of them show good judgement, Beavis is HotBlooded, brash, irritable, and violent, while Butthead is more laid-back, calmer, and (barely) smarter. Ironically, Beavis wears a blue shirt while Butthead wears red shorts.
* Two sets of them in ''WesternAnimation/WingCommanderAcademy'': Payback and Archer (the former is a BloodKnight, the latter often hesitating to end another's life) and, to a lesser degree, Maniac and Maverick (Manic is HotBlooded, Maverick is by-the-book enough to have earned an IronicNickname)
* ''WesternAnimation/{{Wakfu}}'' has this dynamic between [[TheChick Amalia]] and [[TheLancer Evangeline]]. Amalia is a RebelliousPrincess who absconds for little reason other than boredom and brattiness. Meanwhile, Evangeline starts as a [[TheStoic stoic]] TykeBomb with UndyingLoyalty to the Sadida royal family. She is all about duty and self denial and doing what's right. But as things go on, they both learn from each other and end up reaching more balanced positions on the matter of responsibility. Amalia learns from the example of Evangeline's courage and commitment, taking up the challenge of living up to her royal responsibilities and defending the Sadida kingdom at its darkest hour. Evangeline, at the same time, learns how to enjoy herself without compromising her duty.
* [[FunPersonified Freakazoid]] and [[TheStoic Cosgrove]] in ''WesternAnimation/{{Freakazoid}}''. In the episode "Two Against Freak", [[ManInAKilt Roddy]] [[NoIndoorVoice MacStew]] fills in as the Red Oni while Freakazoid is in the hospital. They're even - albeit unintentionally - in the right colors: Freakazoid's in red tights and Roddy's kilt is red, while Cosgrove is always in his blue police uniform.
* Used a bit with the main six in ''WesternAnimation/{{Recess}}'' when broken into three groups of two:
** T.J. as the red oni (hot-headed, easily excitable) with Vince as the blue oni (cool, sarcastic)
** Spinelli as the red oni (hot-tempered, tough) with Gretchen as the blue oni (smart, laid back)
** Mikey as the red oni (outgoing, drama king) with Gus as the blue oni (shy, quiet)
* ''WesternAnimation/LegendOfTheDragon'' has the dragon twins Ling and Ang. You may think from looking at pictures that Ling is the blue Oni and Ang is the red Oni. However, in terms of personalities, Ling is the red Oni and Ang is the blue Oni.
* ''WesternAnimation/FostersHomeForImaginaryFriends'': Bloo (red oni) is obnoxious, self-centered, and rude, while Mac (blue oni) is intelligent, shy, and always wants to do the right thing (most of the time). Ironically, Bloo is well, [[ExactlyWhatItSaysOnTheTin blue]], while Mac wears a red t-shirt.
* WesternAnimation/TotalDrama: Gwuncan, also fits for this trope, as Duncan is a red oni, while Gwen is a blue oni.
* ''WesternAnimation/AvengersEarthsMightiestHeroes'':
** Outside of battle, red-clad Comicbook/IronMan often acts more brash and short-tempered than the calm, reflective, and blue-clad CaptainAmerica.
** For most of the first season, TheWasp loves the exciting and beneficial qualities of crimefighting, but her colleague, ComicBook/AntMan (whose red costume seems ironic in this case), prefers to confront criminals by talking things out and rehabilitating them. They switch roles during scientific projects, which Ant-Man enjoys more than Wasp does.
** One of Wasp's friends, red-clad Comicbook/MsMarvel, confronts invaders with violence while Ms. Marvel's blue-skinned alien protector, {{Captain Mar-Vell}}, believes in finding peaceful resolutions. Their first appearance, as ordinary Army majors, contained another visual metaphor: Ms. Marvel wore a red scarf and Mar-Vell (disguised as an earthling) wore a blue suit.
** The Heroes For Hire include hot-blooded [[LukeCageHeroForHire Luke Cage]] and restrained [[ComicBook/ImmortalIronFist Iron Fist]]. Their different temperaments get lampshaded while Iron Fist meditates.
* OzzyAndDrix has this with a color inversion just like [[OsmosisJones the movie it was based on]], mentioned above, with Ozzy as the Red Oni and Drix as the Blue Oni. This is despite Ozzy being blue and Drix being red.
* In ''WesternAnimation/LooneyTunes'', DaffyDuck serves as the hot-tempered, overacting, obnoxious red oni to BugsBunny, who is a calm, cool, intelligent blue oni.
* The ''Dungeons and Dragons'' cartoon featured Eric as the red oni and Hank as the blue oni.
* ''MonsterAllergy'' has Elena as the red oni and Zick as the blue oni.
* ''YinYangYo'' has Yang who is the aggressive red oni who like to go all melee, and Yin who is the calm blue oni who prefers to use magic. Their colors are inverted as Yang is blue, while Yin is pink.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'': Each type of pony has two representatives and each duo provides a clear contrast between them:
** Earth pony Pinkie Pie is a GenkiGirl and a CloudCuckoolander, compared to Applejack, who is down to earth and more straightforward.
** Turning to the unicorns, Rarity is prone to [[LargeHam theatrics]], often descending into DramaQueen territory, which contrasts with Twilight's [[GrumpyBear serious and somewhat grumpy nature]].
** Meanwhile, the pegasus Rainbow Dash is an extremely confident {{Tomboy}} to Fluttershy's [[TomboyAndGirlyGirl shyer and uncertain Girly Girl]].
*** All three are exemplified in "Hearth's Warming Eve" where, in a pageant, the reds were cast as [[TheCaligula their]] [[RoyalBrat race's]] [[ProudWarriorRaceGuy leaders]] while the blues played their {{Beleaguered Assistant}}s.
*** Conversely, Rainbow is a blue oni relative to the reckless JerkJock Lightning Dust from ''[[Recap/MyLittlePonyFriendshipIsMagicS3E7WonderboltsAcademy Wonderbolts Academy]]''.
** Other relationships show signs of this; for instance, Applejack is a BlueOni to the more gung-ho and impulsive Rainbow Dash, but a RedOni compared to the [[NeatFreak prim]] Rarity.
*** Ironically, despite being the Red Oni in pretty much ''any'' pair (except ''maybe'' when teamed with Pinkie Pie; that one has been shown going both ways), Rainbow Dash is a [[IncrediblyLamePun blue pony]].
*** This is a list of the Mane Cast (and Spike) by order of most red to most blue: [[color:#ff0000:Pinkie Pie]], [[color:#d5002b:Rainbow Dash]], [[color:#aa0055:Applejack]], [[color:#800080:Spike]], [[color:#5500aa:Rarity]], [[color:#2b00d5:Twilight Sparkle]], and [[color:#0000ff:Fluttershy]]
** The Cutie Mark Crusaders count as well. Scootaloo being the RedOni to Sweetie Belle's BlueOni. Applebloom is generally the BlueOni to Scootaloo, and can be either the RedOni or BlueOni to Sweetie Belle.
** Also done with the Princesses, though played unexpectedly. Celestia, brightly colored Monarch of the Sun and the Day, is quite clearly the calm, rational, and wise blue oni while Luna, dark-colored Monarch of the Moon and the Night, is the short-tempered and emotionally driven red oni.
** As far as the [[{{Fanon}} fanbase]] is concerned, Lyra is the overly excitable and emotional RedOni to Bon Bon's grumpier and shyer BlueOni.
** Another fanon example: Electronic musician "DJ Pon-3" Vinyl Scratch vs. sophisticated cellist Octavia Melody.
** Back to established canon, hyperactive party pony Pinkie Pie is the [[RedOni Red Pony]] to her quiet, rarely-emotional sister Maud.
** Princess Twilight is a red pony to the blue Princess Cadance.
** In ''Rarity Takes Manehattan'', [[OpportunisticBastard Suri Polomare]] is the red pony to both her {{beleaguered assistant}} Coco Pommel and Rarity herself.
* ''MyLittlePony'' as a whole had several of these. The most obvious being Firefly-Medley and Cheerilee-Rarity.
* ''WesternAnimation/AdventureTime'': Their color scheme is backwards though: Marceline is a mischievous, loud, and careless Red Oni who has a bluish complexion (although she does wear red, which is weird since she [[OurVampiresAreDifferent eats red]]) while Princess Bubblegum is a polite, calm, and caring Blue Oni who is pink and wears a lot of pink (she ''is'' made out of bubblegum after all).
** [[ZigZaggingTrope Zig-Zagged]] with Finn and Jake. It can be pretty hard to tell if Finn was the HotBlooded and headstrong Red Oni who relies on force and charges in headfirst and Jake is the wise and reasoning Blue Oni, or if Jake was the mischivous and bone-headed Red while Finn acts as a good natured and friendly Blue.
* ''WesternAnimation/TheSimpsons'': Impulsive Homer and practical joke artist Bart clearly form the Red Oni half of the Simpson household to pragmatic, tradition-worshipping Marge and bookworm Lisa's Blue Oni.
* ''WesternAnimation/KingOfTheHill'': Dale and Bill are generally the red, Hank and Boomhauer the Blue. Though Hank ''is'' dedicated to the point of near-blindness and refuses to admit he has an anger problem
* In RegularShow, Mordecai (blue) and Margaret (red) deliberate follow this trope - both in appearance and personality. To a lesser extent, there's the relationships between Mordecai and Rigby, and the relationship between Muscle Man and High Five Ghost.
* ''WesternAnimation/EdEddNEddy'': Eddy is short-tempered, has NoIndoorVoice, hates following the rules, and follows his gut (Red Oni) while [[TheSmartGuy Edd]] ([[InSeriesNickname Double D]]) is willing to follow the rules, intelligent, rational, and thinks before he acts (Blue Oni).
** Eds (relatively nice guys, trying to succeed via cunning rather than brute force) are blue to the Kankers' (blunt, insensitive molesters, always solving their problems by violence) red.
* ''WesternAnimation/SamuraiJack'' has Jack (Blue) and the Scotsman (Red). Jack is quiet, stoic, and relaxed; the Scotsman is loud, boisterous, and passionate.
* ''WesternAnimation/TinyToonAdventures'' has Buster who is the more intelligent and calm of the 2 stars as the Blue Oni, and Babs who is the more crazy and mischievous of the 2 stars as the Red Oni.
* ''WesternAnimation/MikeLuAndOg'': Mike is the red oni to Og's blue oni, although she becomes a blue oni when contrasted with a certain green wearing [[RoyalBrat island princess]].
* In the Disney WartimeCartoon [[http://www.youtube.com/watch?v=gluGa_trlHw Reason and Emotion]], Reason is the blue to Emotion's red. They even happen to be colored blue and red. The cartoon also argues that UsefulNotes/AdolfHitler destroys the blue and plays on the red to gain power.
* In ''WesternAnimation/YoungJustice'' the main team has ComicBook/{{Superboy}}, Kid Flash and Ms. Martian as the Red to Aqualad, Robin and Artemis's Blue respectively.
* ''WesternAnimation/JackieChanAdventures'' has Jade being all impulsive, insistent, and violent while Jackie is relaxed, thoughtful, and peaceful.
* ''WesternAnimation/MrBogus'' (red) and his best friend Tommy Anybody (blue). However, ironically enough, Bogus actually wears a pair of blue pants, while Tommy wears a pink shirt (to be completely fair would be the closest thing to red) though he does wear blue jeans.
* ''WesternAnimation/GravityFalls'' has the studious and thoughtful SeekerArchetype Dipper (Blue Oni) and the loud and boisterous GenkiGirl Mabel (Red Oni).
** Coindicentally, Dipper wears a navy-blue vest, whereas Mabel wears red (or any different shade of the color) on several occasions.
* ''{{Family Guy}}'': Stewie is red to Brian's blue, and Peter is red to Lois' blue. Other pairings within the family can be all over the place, but Brian is definitely the bluest overall. Among the guys, Cleveland is probably the bluest, Joe is generally blue but can get [[NoIndoorVoice REAL RED REAL FAST AND REAL LOUDLY]], Quagmire is usually red, and Peter is almost always red.
* Helga Pataki from ''HeyArnold'' is an aggressive and hot-tempered red, her best friend Phoebe Heyerdahl is an intelligent and laid-back blue.
* The titular WesternAnimation/VentureBrothers [[DivergentCharacterEvolution become more and more different over the series]]. Hank is a FearlessFool [[IJustWantToBeBadass badass]]-[[SmallNameBigEgo wannabe]] with shades of CrouchingMoronHiddenBadass and CasanovaWannabe. Dean has grown up to be more cautious, shy, and intelligent, but also learned to stand up for himself and others.
* ''Series/SquareOneTV'' inverts this trope with there animated sketch series ''Zook & Alison'', The boy, Zook, is loud, nervous, and outgoing, but is Blue in color, while his Pink sister, Alison, is calmer and smarter.
* In Sidekick! Vanna while an AlphaBitch, usually (When she isn't pissed off at Eric) hides her emotions and acts pretty chill most of the time (Blue) As opposed to Kitty who is extremely hyper and excitable (Red) as well as Eric is the rational OnlySaneMan (Blue), while Trevor is impossibly impulsive and does literally everything he possibly can without thinking ahead (Red)
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