Martin Luther King and Malcolm X have sometimes been described as the yin and yang of the civil rights movement. In this trope's terms, the militant X would be red oni while the pacifist King would be blue.
In 1970s New Zealand politics Prime Minister Sir Robert Muldoon was the Red Oni to Opposition Leader Bill Rowling's Blue Oni.
In Rhodesia, PK van der Byl was red to Ian Smith's blue.
Keeping with Africa, Louis Botha was the red oni to Jan Smuts'blue. Also during the Apartheid era the leaders were as follows: DF Malan blue, JG Strijdom red, HF Verwoerd red, BJ Vorster blue, PW Botha red and FW de Klerk blue
Then there were Franz Josef Strauss and Helmut Kohl, the two most prominent conservative politicians of 1970s and 1980s West Germany and bitter rivals for chancellorship. Strauss was a head-strong, polarising Bavarian patriot who was most used to making fiery, aggressive Stammtisch speeches and operating in equally unsubtle political leaps. Kohl was a slick, calculating Palatinatian who was best at finding party friends through favours and political flummery, and never put his foot where it didn't belong. While both men were fairly corrupt and had their share of sponsors and ulterior business, Strauss' relative impulsiveness meant he couldn't hide it; eventually the Spiegel Scandal cost him his political posts, and forever damned him to regional politics (though he ultimately became both much bluer and very successful there). Kohl, on the other hand, found that his political maneuvering and flattery eventually earned him the 6th federal chancellorship in time for German reunification.
In the British Isles the Republic of Ireland is the Red Oni to the United Kingdom's Blue Oni.
Model company Tamiya has a logo consisting of two white stars; one on a red background, one on a blue background. And indeed, the red star stands for passion and the blue one for precision.
In politics, red and blue portray the opposing movements this way:
During the Cold War, communist countries were represented by a red star, symbolizing the passion associated with revolution and subversion of "the system", while capitalist ones were associated with the color blue, representing the "cold" and calculating nature of the capitalist ethos.
Inverted in the American Revolution, where the British already had red uniforms and the revolutionaries were left with blue (when they had uniforms, anyway).
In the USA, Red represents Republican states or regions, Blue represents Democratic states or regions.
Played straight as far social issues go. The red Republicans are as a whole more passionately religious, containing the Christian right, and supportive of laws pushing a certain moral view point, and also support gun rights and are more likely to be War Hawks. Democrats on the other hand support a live and let live mentality concerning social rights, except when it comes to supporting gun control, and are more likely to be Peace Doves.
The colors were arbitrarily changed around until the 2000 presidential election, where Tim Russert started talking about "red states" and "blue states" and the monikers stuck. The old way can be seen in older institutions like National Review. The website's masthead and the borders of every issue's cover are blue and always have been.
And reversed in the United Kingdom and Canada, where the main left-leaning parties (Labour and Liberals, respectively) are identified by the colours red and yellow, while their opponents in the Conservative Party are identified by blue. In this case, the use of red is derived from the socialist and social democratic associations of each party, while blue was traditionally associated with the monarchy and other such traditional institutions.
Red-left and blue-right is the standard in most of the Western world for the reasons listed in the UK and Canada entry above. American conservatives can be heard, from time to time, lamenting being assigned the "wrong" colour in a freak occurrence. For example, the Cold Warrior line "Better dead than Red" no longer holds in domestic politics.
Theodore Roosevelt and Woodrow Wilson, the two famous Progressive-era Presidents. They aren't color-coded, but they fit the personalities well and the colors associated with their modern day parties. Theodore Roosevelt is also the Red Oni towards his Secretary of War and Presidential successor William Howard Taft, who was definitely the Blue Oni. The boisterous TR was also the Manly Man to Taft's Sensitive Guy (that's right, folks, TR was such a Manly Man that he was more of a Red Oni than his own Secretary of War!). TR endorsed Taft to succeed him in the 1908 election, but soon grew impatient and dissatisfied with the Taft administration and ended up running against him, first in the GOP primaries, and then running with a brand new party of his own creation when he lost the primaries.
Admirals Halsey and Spruance who regularly exchanged commands of the Central Pacific sub-theater in World War II. Halsey was the Red Oni and Spruance the Blue Oni. True to form, when under Spruance's command the fleet was more conservative but took fewer risks, while under Halsey the navy suddenly became bolder but prone to Leeroy Jenkins. Compounding the confusion for the enemy was the fact that the fleet changed its name whenever the command turned over: 3rd Fleet when under Halsey, 7th when Spruance. The Japanese, at first baffled by the U.S. Navy's apparently schizophrenic nature, eventually figured it out and made it a major part of their plan at Leyte Gulf.
Robert E Lee's two wing/corps commanders in the Army of Northern Virginia (Lee himself was basically The Kirk of a Power Trio when he's included in the mix) - Red Oni Thomas "Stonewall" Jackson and Blue Oni James Longstreet.
McCain was also a Red Oni to Mitt Romney's Blue Oni, and Obama played Blue Oni to Hillary Clinton's Purple Oni (some Red Oni traits, some Blue Oni traits) during the respective primaries. Mike Huckabee was arguably another Red Oni, although he doesn't fit it quite as well as McCain (Huckabee is often just as fiery when talking about issues, but otherwise seems quite personable, even to opponents, so he doesn't quite fit the Red Oni designation as well as McCain). So perhaps he'd be a Green Oni?
Speaking of Mitt Romney, as of the 2012 Republican primaries, he's now the Blue Oni to ALL the other candidates' Red Onis! And not surprisingly, within the Republican Party, those who favor the Blue Oni approach to campaigning—i.e. focus on the economy and don't bother with the fiery and divisive "culture wars" issues—seem to be lining up behind Romney, while those Republicans who favor the Red Oni approach, where the "culture war" issues are front-and-center, are divided between Newt Gingrich (who's the most Red Oni personality-wise too, in stark contrast to Romney's Blue Oni temperament) and Rick Santorum. Oddly enough, there's also a second category of Red Oni in this year's GOP primaries: Representative Ron Paul and his supporters, who, interestingly enough, support a platform that avoids the "culture wars" issues, which should put them in the Blue Oni category, if not for the fact that they are so loudly passionate about it that Ron Paul and his supporters' approach is definitely Red Oni, despite the fact that their actual platform seems more suited to Blue Onis.
Sarah Palin is also a Red Oni to Obama's Blue Oni; McCain would also play Blue Oni to Palin, but only really in comparison. Similarly, Joe Biden is the Red Oni to Obama's Blue.
Bush was also a Red Oni to Dick Cheney's Blue Oni.
In the 2004 election the Bush (red)/Kerry (blue) contrast was striking (almost as much as Bush/Gore in 2000). Edwards would have been the red VP to Kerry's blue had they been elected. (As for Gore and Lieberman, it's hard to say which one would have been the red because they were both fairly blue.)
Other Presidential election contests: 1960 had red Kennedy vs. blue Nixon; 1964 had blue Johnson vs. red Goldwater; 1968 had blue Nixon vs. blue(r) Humphrey vs. red Wallace; 1972 was blue Nixon vs. red Mc Govern; 1976 was red Carter vs. blue Ford; 1980 was blue Carter vs. red Reagan; 1984 was red Reagan vs. blue Mondale; 1988 was red G.H.W. Bush vs. blue Dukakis; 1992 was red Clinton vs. redder Perot vs. blue G.H.W. Bush; 1996 was red Clinton vs. blue Dole.
Recent President-Vice President pairings: Reagan (red)/G.H.W. Bush (blue); G.H.W. Bush (still blue)/Quayle (red); Clinton (red)/Gore (blue); G.W. Bush (red)/Cheney (blue); Obama (blue)/Biden (red). Ryan would have been red to Romney's blue, and (as mentioned above) Palin would have been red to Mc Cain's blue (although both were fairly red overall).
Other President/VP pairings: Kennedy (red)/Johnson (blue); Johnson subsequently turns red to Humphrey's blue; Nixon (blue)/Agnew (red); hard to say with Carter and Mondale (both fairly blue, Carter probably the red of the two though).
The 2012 Presidential election has rivals Rick Perry, a Red Oni, and Mitt Romney, a Blue Oni, Michele Bachmann, another Red Oni, and Newt Gingrich, another Red Oni. Herman Cain and Rick Santorum have both Red Oni and Blue Oni qualities, and Ron Paul would be a Yellow Oni.
A slight inversion with ex-presidents turned best buds, George W. Bush and Bill Clinton. Democrat Bill is the Red Oni, while Republican Dubya is the Blue Oni.
In general, this is a common theme in picking Vice-Presidents; if, say, an ideologue is at the top of the party's ticket, he will usually select a moderate to assuage concerns about radicalism (and vice-versa). JFK picking LBJ is probably the most famous example.
Thus far in the 2016 presidential primaries, the Republican party's contenders have included red oni Donald Trump, Carly Fiorina, and Chris Christie, with blue oni Ben Carson, Ted Cruz, Marco Rubio, and Jeb Bush. The Democratic party's primaries have Bernie Sanders (red) and Hillary Clinton (blue), with Martin O'Malley falling between the two.
South Korea's flag is the yin-yang with blue and red instead of the usual white and black.
South Korea itself is the restrained, well-behaved sibling of the boisterous, blustering North.
Unsurprisingly, siblings can be like this. This is especially pronounced when they're twins, or when there are only two children in a family. For larger families, there may be more than one red/blue sets.
Jon Stewart is the Blue Oni to Stephen Colbert's Red Oni. Lampshaded in the Rally to Restore Sanity and/or Fear, in which Stewart rallied for "sanity" while Colbert rallied for "fear".
L.A. street gangs: The Crips and the Bloods wore blue and red bandannas respectively to distinguish themselves from one another. Whether either group tended to be more emotional and hot-tempered though, is up for debate.
Swedish monarch Gustavus Adolphus and his chancellor Axel Oxienstierna, at least in Hollywood History. An anecdote has an exasperated Gustavus telling Oxienstierna "If it wasn't for me, this country would be frozen solid!" and Oxienstierna calmly replying "And if it wasn't for me, it would be burnt to ashes."
Queen Elizabeth II is the blue oni - blue is her favorite color and all - since she is so prim and proper, always practical and no-nonsense. Her late sister Margaret was the red oni. Which one is the Tomboy and which one the Girly Girl is harder to determine.
Another example of siblings fitting this: the Gyllenhaals. Look at their film roles and their offscreen personalities: Maggie is the Red Oni and Jake is the Blue Oni.
There are two main different types of personality that define this trope - Red Oni is extrovert and Blue Oni is introvert.
Richard Feynman and Julian Schwinger. Feynman was rough, energetic, informal, and uncouth. Schwinger was dignified, reserved, formal, and proper. They took completely different approaches to quantum electrodynamics and came up with essentially the same solutions. They (along with Sin-Itiro Tomonaga) shared a Nobel Prize for this work in 1965.
In Australian Politics, Opposition Leader Tony Abbott plays the Red Oni to the Blue Oni of Prime Minister Julia Gillard (and her immediate predecessor Kevin Rudd).
In a similar case, Patton and Montgomery. Patton who is an aggressive newbie, and eager to get to the front, and one of the first American Pioneers of Mobile warfare, while Monty is a reserved veteran and has more experience in fighting the Germans, who prefered to wait until he had an overwhelming advantage before moving at all. In a subversion, however, Montgomery was one of the few equal matches for Patton in terms of ego and boastfulness.
In yet another case, Patton vs Rommel. Again, Patton was the red oni while Rommel was the blue one. The Hot-Blooded Patton even named Rommel a calm Magnificent Bastard.
Also in World War II, Adolf Hitler and Heinrich Himmler. Hitler (red) originally aspired to be an artist, was more charismatic, more aggressive, and was able to inspire supporters with his speeches, but he was very bad with paperwork and details and cared little for economics. Himmler (blue) had no artistic talent at all, was socially awkward, and was described as a better listener than speaker, but he was far more organized and methodical than Hitler was and more on top of things when it came to bureaucracy and money.
Jefferson was himself the Red Oni to Alexander Hamilton's Blue Oni when the two men served as secretaries of state and treasury, respectively, under President Washington. Jefferson was also Red Oni to James Madison's Blue Oni when Jefferson himself became president and Madison his secretary of state.
Jefferson and Adams had switched roles by the 1800 election, with Adams all but accusing Jefferson of being an anarchist, and Jefferson accusing Adams of being a crypto-monarchist.
In the US Congress, the House of Representatives is often considered the Red Oni to the Senate's Blue. It's an Invoked Trope on the part of the Constitution writers - the intention was to have the House, whose entire membership is elected every two years and whose distribution among The Several States is based on each state's population, be more responsive to "the people", which they generally considered fickle and moody (back in the late 18th Century, "democracy" was a somewhat pejorative term that had more connotations of mob rule). The Senate, meanwhile, is distributed two to every state and its members are elected to six-year terms (only 1/3 of the body would be up for election each time), thus its composition would change less drastically; the Senate is meant to be the more deliberative body. Each house's unique duties delegated by the Constitution are also reflective of this idea: for example, only the House can introduce a bill that involves the Federal budget or taxes, while the Senate is the body that ratifies treaties with other nations.
Among the First Triumvirate in Ancient Rome, the red was Pompey the Great, the fashionable and charismatic maverick who loved the spotlight, and the blue was Marcus Crassus, the behind the scenes wheeler-dealer who preferred to stay in the shadows. Gaius Julius Caesar fell somewhere between the two.
The People's Assemblies provided the Red to the Senate's Blue, serving more or less the same roles (for obvious reasons, Rome having invented separation of powers). Also invoked by the offices of the Consuls (basically two simultaneous Presidents): each month one would rule directly, and the other would be available for appeals and to veto the first's decisions in case they were too rash.
Prime Ministers William Gladstone (red) and Benjamin Disraeli (blue).
Cats and dogs can be stereotyped as this, with dogs (Red) being more outgoing and energetic and cats (Blue) being more independent and reserved.
Crows (red) and Ravens (blue). Crows are loud, flap their wings fiercely in flight, and twitch about nervously when perching, while Ravens are more quiet, soar through the air, and keep a more stable footing when perching.
Former French President Nicolas Sarkozy (red oni), and his Prime Minister François Fillon (blue oni).
In the Chinese Civil war the Communist Party of China who are the red communist, to the blue nationalist Kuomintang. Today they are the People's Republic of China, and the Republic of China respectively.
Chairman of the Communist Party of China Mao Zedong was the Red to Premier Zhou Enlai's Blue.
In pathology, bacteria thrive in hot, marshy, and tropical environments (red oni) while viruses thrive in cold, boreal, and tundric environments (blue oni). Both can infect mammalian life of any kind and can prove difficult to eradicate.
The two most common Doritos flavors are Nacho Cheese and Cool Ranch. They fit the red oni and blue oni labels in both packaging and taste.
Among the Allied Forces, America was the very late, Heroic, and dangerously overpowered Red Oni (responsible for turning Japan into a Blue Oni), while England was the enduring, rational and fought most of the war Blue Oni. France fell in the middle.
The four temperaments have this trope down too. Cholerics and Sanguines are described to be Red Onis while Melancholics and Phlegmatics play the Blue. According to some people, they aren't only like this in terms of behavior, but also their primary motives. The Melancholics want perfection. The Phlegmatics want peace and to be able to relax. The Cholerics want power and control. While the Sanguines want just some fun.
The Apostles St. Peter and St. Paul. Peter was the Red Oni (think him about striking the ear off one of the Roman soldiers! and also how he over promises to Jesus Christ die with Him although Jesus knows that he will deny Him and yet it is happened.), while Paul was the Blue Oni (he had studied under Gamaliel the Great and was very eloquent).
Steve Jobs (red) and Bill Gates (blue). Jobs and Wozniak also fit.
The co-emperors of the Roman Empire after the death of Antoninus Pius fit this. Lucius Varrus was the red, with Marcus Aurelius being the blue.
Mark Antony and Octavian from the Second Triumvirate.
In his book Thinking Fast and Slow, the behavioral psychologist Daniel Kahneman posits that people use two different modes of thinking: one that is "fast, instinctive, and emotional", and one that is "slower, more deliberative, and more logical". Extend this to distinguish the types of people who rely more on the first mode and those who rely more on the second, and you have some scientific basis for the existence of this trope.
Adolf Hitler and Josef Stalin. In public, Hitler was the Red Oni. During his speeches he was very animated and explosive, whipping himself and the audience up into a frenzy. Meanwhile, Stalin's speeches were more dreary and tranquil, making him the Blue Oni. However, in private, it was reversed. Those close to him described Hitler as being very relaxed, simple, and easygoing. Some historians have even pointed to Hitler's easygoing nature as a reason for losing the war. He often shrugged off problems that later became much bigger problems, such as Hermann Goering's repeated failures with the Luftwaffe. Stalin, on the other hand, was known for his sudden fits of rage and paranoia which usually led to the infamous Soviet purges. More high-ranking Communists were actually killed by Stalin than by Hitler.
The three major countries on the North American continent: Canada (Blue), Mexico (Purple), and the USA (Red).
In the past during the Cold War, of the two major communist powers the USSR was the red (active player in the Cold War and the worldwide spread of communist ideology) while China was the blue (more inwardly-focused on building China and, as they have been for much of history, aloof to global politics). Now, arguably, the roles are reversing: Russia (no longer communist) is stagnating demographically and playing mostly rearguard militarily (blue) while China ("communist" in name only) is becoming more dynamic and assertive economically and militarily (red). However, in an economical sense, Russia's foreign policies idealistically focus very much on its direct neighbours and traditional Soviet brethren (Ukraine, Belarus, Serbia, Azerbaijan, etc) and minor, obscure 'Enemy Mine' allies in the theatre (like Syria and Iran), while China, in a extraordinary fit of Realpolitik, is expanding on a global scale, including into North America and Europe (its former ideological enemies' turf) as well venturing into new and relatively untapped environments like Africa.
Athens (which valued learning and culture) was blue to Sparta's red (where military glory was valued).
The Superpower Polar-Opposites. America is the Outspoken, Boastful (and sometimes annoying) Red, While Russia is the deadly serious, no nonsense and hardworking Blue, China is in-between.
Their counterparts also fit: England and Japan serve as the Blues to America and China, while Belarus (Blue) has created less issues compared to Ukraine (Red) recently that Russia always tries to solve to their own advantage.
The Sun and the Moon: The Sun takes up most of the day but can be very dangerous (Red), However The Moon has less time and is pale and more calming (Blue). Works both ways since the sun is the only thing keeping the whole solar system in order while the Moon has a tilted axis, making exact dates of eclipses hard to tell.
England's most popular races tend to qualify: Polish (Red) mix fun and work together and sometimes be cocky, Nepalese (Blue) are highly traditional, open-minded and loyal to a fault. Indians are in-between.
In the long-lasting rivalry of the top two US premium cable networks, HBO is blue and Showtime is red. Going all the way back to the 1980s, the perception has always been that HBO=prestigious and Showtime=edgy, even though they've always had similar programming philosophies. It helps that their logos are the proper contrasting colors.
Ex-US President George W. Bush and Ex-UK Prime Minister Tony Blair were popularly seen as this by media; Bush as the impulsive, clueless, ditzy American Cowboy, and Blair as the principled, inoffensive, yet utterly spineless British College Boy.
John Belushi and Dan Aykroyd: Onscreen, Belushi was often typecast as the partier and the emotional one (red) while Aykroyd usually played his more level-headed friend/neighbor/sibling/what have you (blue). Offscreen, they flip flopped: while Belushi was generally a bit more levelheaded and calm than Aykroyd, Belushi was also prone to emotional fits and mood swings while Aykroyd had a tendency to be so quiet and often awkward that he earned the nickname "Frosty the Robot."
Red Oni Penn Jillette teams up with Blue Oni Teller to create the magic/comic duo Penn & Teller.
The four seasons have this affect on humans:
Spring (The season of new born animals, new beginnings and optimism) (red)
Summer (Often the hottest season which means holidays and less work to be done) (red)
Autumn (Beginning of hard work and preparation towards nature and profession) (blue)
Winter (The season of ending, a time of embracing both tradition and forgiving past mistakes) (blue).
The comedy team of Ricky Gervais and Stephen Merchant. Gervais is exuberant, excitable and volatile, prone to cackling laughter and angry outbursts. Merchant, on the other hand, has a a more deadpan delivery and reserved personality in which he usually acts mildly amused. It also helps that they're a study in physical opposites as well.
Motorbikes and Cars can be seen this way. Although designed to be faster and more versatile, Motorbikes (Red) are often loud, harder to control and not very endurable. Compared to Cars (Blue) who are mostly built to take considerable pressure, have more room and can deal far greater damage despite being slower than the latter mostly.
Planes and Helicopters are a good example of this trope too. Though faster, planes can only fly in one direction at a time making them a lot harder to control than Helicopters. Helicopters may be slower than planes but their versatility and steadiness in the sky make them a worthy rival in combat.
Bellatrix (a large blue giant star) and Betelgeuse (a red supergiant), both located in the "shoulder" parts of the constellation Orion, opposite each other. Bellatrix is a very hot star, while Betelgeuse is a relatively cool one. Both are nearing the end of their stellar lifespans, and both are likely to go out in a supernova. Bellatrix will most likely become a magnetar or a black hole, and Betelgeuse will most likely become a pulsar or neutron star. This is because Bellatrix is more massive than Betelgeuse.
America and Vietnam in The Vietnam War may explain a lot. Paying a very hefty price for attacking a land they barely knew, Red Oni, America lost the conflict purely from lack of knowledge of the land and jumping into battle against very cunning opposition. Blue Oni, Vietnam may only have a small country but are fiercely deceptive, committed and proved to give even bigger countries a black-eye through Guerrilla Warfare. However some argue that America pulled out by political means but still lost the conflict that fact is solid for sure.
Played with a bit in the famous duel between Miyamoto Musashi and Sasaki Kojirō in 1612. Musashi, with his brash nature and unkempt appearance, would seem to be a classic red oni, but he was actually far more clever and calculating than most red oni. Proud, cultured Kojirō is a more classic blue oni. When Musashi showed up late to their duel, Kojirō was so upset that it broke his calm fašade and he lost the duel and his life.