Hayley: Going? Where are you going?
Tommy: Shopping. I checked my closet this morning, and there's a serious shortage of black in there.
Everyone recognises Captain Superhero! He wears a blue cape, a red tunic, and green tights! And no-one suspects he's the mild mannered Steven Ulysses Perhero...who always seems to wear a blue jacket, red shirt, and green pants.
This is where a superhero's Secret Identity wears clothes that somehow match his superhero costume, in order to make him easier for the audience to identify.
Compare Astonishingly Appropriate Appearance, especially if he always dressed like that, but didn't choose their costume colours. If a shapeshifting superhero wears the same colours in his superhero identity because of the clothes he's wearing, that's Morphic Resonance.
- Sailor Moon:
- Sailor Moon's costume as a magical girl looks almost exactly like the sailor-style school uniform she wears as Usagi Tsukino: a white Sailor Fuku with a blue collar and pleated skirt and a red bow on the chest. The difference is mostly that Sailor Moon's outfit is a snug-fitting bodysuit rather than a loose middy blouse, the skirt is shorter, and the ensemble includes elbow-length gloves and red knee boots. (The resemblance becomes increasingly less pronounced as her transformation upgrades in later story arcs, adding more colors and Frills of Justice in the process.)
- The school uniforms of the other girls mostly don't bear so close a resemblance to their magical girl outfits beyond the general sailor style (notably, Minako's uniform has the same color scheme as Usagi's and Ami's, despite studying at another school whose uniform uses the traditional sailor neckerchief instead of the bow), and adaptations vary on how strongly the color-coding is in effect where it comes to their street clothes. In Sailor Moon Crystal they almost uniformly dress in their signature colors, while in the '90s anime adaptation everyone wears a range of clothes in different colors from one day to the next and any color-coding is mostly coincidental.
- The Samurai Pizza Cats' civilian outfits were so similar to their mission gear (and they always wore the same helmets!) that it was often hard for the viewer to tell which they were in, yet the villains of the show couldn't even identify the heroes when in their civvies. Lampshaded at least once.
- In Tiger & Bunny, Kotetsu's Powered Armor is black, green, and white. His casual clothes? Black slacks, green shirt, black and white vest with matching hat. Barnaby also has similar color coding, but he has the excuse of not actually having a secret identity.
- The casual clothes of the heroes tend to be similar in colour to their costumes (Pao Lin in yellow, Nathan in red/pink, Keith and Ivan get blue/purple-ish shades). Karina is an exception, wearing warmer/darker colours than her skimpy blue outfit as Blue Rose. Possibly intentional, given how uncomfortable she is with her hero persona. Even Lunatic gets in on this, as when we see Petrov at the end of episode 9, he's wearing a grey suit with a blue-and-green patterned tie, similar to the colours of his costume.
- The Pretty Cure franchise takes this to ridiculous lengths since Yes! Pretty Cure 5 as they not only wear color-coded civilian clothes, most of them have color-coded hair. The only one defies this trope is Ako/Cure Muse of Suite Pretty Cure ♪, who wears pink and blue despite wearing black at first then going into yellow.
- In general, the Cures tend to use color-coded objects as well that correspond to their Cure theme color (which is implied to be their favorite color even before they get their powers), such as mugs, umbrellas, bowling balls, and even toothbrushes.
- Tokyo Mew Mew: the heroes' magical girl outfit has the same colour as the uniform they wear to work part-time in the cafe.
- The kids from Digimon Frontier. Except for Koji and Koichi, they mainly wears colors very similar to their Legendary Warrior Digimon forms (Takuya wears red and yellow like Agunimon, Zoe wears pink like Kazemon, etc).
- Lyrical Nanoha:
- Justified with Nanoha. Her Barrier Jacket is based off her school uniform in-universe (it was the first thing to pop into her head when she was asked to come up with a design). This continues in StrikerS, where her uniform as an Air Force instructor is also white. That said, her choice of casual outfits tend to be more varied.
- Fate also tends to prefer black clothing (according to supplementary material, it's her favorite color). And just like with Nanoha post-Time Skip, her Enforcer uniform is black.
- Golden Age and Silver Age Clark Kent always wore a blue suit with a red tie. (Also seen in Superman: The Animated Series.)
- Lampshade Hanging in Smallville - Clark favoured wearing a blue shirt and red jacket...and that's why he became known as the Red-Blue Blur before he started wearing a costume.
- When Electro-Superman was split into Superman-Red and Superman-Blue, the businesslike Clark-Blue wore a grey suit with a blue tie, while the more relaxed Clark-Red wore an open-necked red shirt.
- Golden Age Bruce Wayne frequently wore blue and grey outfits, and Dick Grayson wore red and green.
- They actually tried to avert this in the first season of Batman: The Animated Series and have Bruce Wayne not wear clothes the color of Batman's outfit. Due to color palette limitations, that meant he spent a lot of time wearing a rather ugly brown suit. In later episodes, Bruce usually wears a dark suit and Dick wears a red sweater vest. Barbara Gordon favoured purple, perhaps reflecting Batgirl's costume in the 1960s TV series.
- Like his predecessor Tim Drake almost exclusively wears red or green shirts in his civilian life.
- In the current DC Comics and dating at least from the 1970s Shazam TV series, Billy Batson always wears a red shirt with a yellow collar.
- In Superior Foes of Spider-Man and its Spiritual Successor Astonishing Ant-Man (both written by Nick Spencer), Janice Lincoln, the new Beetle wears some shade of purple whenever shown in civilian attire, whether in flashbacks or the present (i.e. her valedictorian graduation robes, her business dress as an Amoral Attorney, and a swimsuit) evoking the color of the Beetle costume. The former series also parodies this trope with the Shocker having a couch with the same eye-watering red and yellow check as his costume.
- Wonder Woman: While her normal outfit back in the Golden Age when she spent a lot of time maintaining her secret identity was a USAAF uniform Diana has always had a propensity for wearing red shirts, red dresses and blue skirts with star patterns on them while she's not acting as Wonder Woman, though she generally only wore the later out in public after her identity was public.
- Accel World: In the Accelerated World, each duel avatar is themed after a unique colour based on the user's personality. The majority of Burst Linkers wear a similarly-coloured Neurolinker around their neck in real life, and some take it further with clothing or even their hair and eyes. Lampshaded when Chiyu notes that she's been unconsciously adding more green to her wardrobe since becoming Lime Bell, and Haru cautions her not to get a green case for her Neurolinker unless she wants to make their group's identity too obvious. He's quick to defend his own silver Neurolinker by pointing out that he had it long before he became Silver Crow.
- The Power Rangers, a fact occasionally lampshaded.
- The best example of that comes from Power Rangers Dino Thunder when Tommy, returning to action as the Black Dino Ranger, approaches Conner, Kira and Ethan and tells them he has to run to the mall - he checked his closet and realized he had a complete lack of black.
- The early seasons took it Up to Eleven, where the characters seemed to own nothing that wasn't in their ranger color. Some actors have said they couldn't stand the color anymore after their time on the show. Getting to keep their secret identities was a major point of Fridge Logic, as the five teenagers who obsessively wore nothing but the colors of the Rangers and were all skilled martial artists kept disappearing just before the Rangers showed up. At least Tommy, as the Green and White MMPR Rangers, the Red Zeo and Turbo Ranger, and the Black Dino Ranger, got to change his every so often.
- The current page image comes from Samurai Sentai Shinkenger. Ironically, they're much less obsessively colorcoded than some series and don't care if people know who they are.
- Even the villains get in on it. In Power Rangers in Space, the surviving (Red, Black, and Yellow) Psycho Rangers take on human form. To emphasize that they're evil, they are all wearing black pants and black leather jackets and have colored undershirts so we know which one is which. Unfortunately for Psycho Black, this meant he was wearing nothing but black. Justified in this case, as we had never seen them as humans before.
- It's so expected that it's confusing when they don't. In Kamen Rider Dragon Knight, not all the Riders' unmorphed bikes are the same as their Rider colors, which makes it hard to tell who's who when they wear visored helmets. Power Rangers Operation Overdrive has the same problem with the bikes and ATVs used when unmorphed. We laugh at the heroes who seem to wear nothing but their colors, but it turns out Tropes Are Not Bad.
- Pretty much almost all Power Ranger and Super Sentai season fulfill this trope in some way.
- In The Five(ish) Doctors Reboot, as part of its running entirely on Adam Westing, all of the ex-Doctors (apart from Tom Baker, who never appears outside of deliberately bad stock footage) dress in toned-down versions of their Doctor's taste when out-of-character. Peter Davison favours lots of beige and Brainy Specs, Sylvester McCoy wears printed scarves, dark clothes and little hats (as well as a Fun T-Shirt with the logo for The Hobbit on it), and Colin Baker wears seriously eye-searing red, blue and yellow checked shirts. Paul McGann favours a bottle green jacket, and David Tennant sticks to suits.
- This is a takeoff of something former Doctors tend to do: for an example, this photograph from the 1980s◊ shows only the current incumbent (Peter Davison) in costume, while all the former Doctors are wearing outfits that resemble their Doctors' - Pertwee in a velvet jacket and frilly shirt, Troughton in a bowtie and braces, and Tom Baker in a shabby frock coat with elbow patches, a silk scarf as a tie and a colourful stripy scarf.
- In The Spectacular Spider Man, prior to becoming Venom, Eddie Brock always wears a black leather jacket and a white t-shirt, foreshadowing the color-scheme of his living "costume". Of course, once bonded to the costume, he naturally has it shapeshift to look like his civilian clothing.
- In Voltron: Legendary Defender outside of their lions and armor, their casual costumes still fit their color scheme. Shiro wears a black body suit, Keith has a bright red jacket, Lance wears a blue shirt and jeans, Pidge has a green shirt, and Hunk wears a yellow shirt and bandanna. However, the "secret identity" part does not apply currently.
- Most of the characters in Marvel Rising not only wear the same colors in their civillian identity, but generally sport some kind of accessory with their insignia on it. The most blatant is Ghost Spider, who wears a white top with a neon pink spider over black as Gwen Stacy.