%% Zero-Context Examples have been commented out. To fix them, explain why it is an example of the trope before removing the percent signs.

-->We gotta find the next pawprint,\\
And that's our second clue!\\
Then we put it in our notebook--\\
'Cuz they're ''whose'' clues?\\
''Blue's Clues!''

''Blue's Clues'' is a famous, [[LongRunners long-running]], and ''incredibly'' influential children's television show, produced by, and previously shown on, Creator/{{Nickelodeon}}. If you grew up in the United States, the UK, or Brazil during the 1990s or early 2000s, the odds are good that this show will be familiar to you (under different hosts and names respectively).

Set in a [[SugarBowl vibrant]], [[AmazingTechnicolorWildlife candy-colored world]] of [[RogerRabbitEffect animated characters combined with a human host,]] the show features the escapades of Blue, a [[ExactlyWhatItSaysOnTheTin blue-colored dog]] (voiced by Traci Paige Johnson, one of the show's creators). OnceAnEpisode, Blue will want to do something--be it read a book, have a snack, or make some kind of craft. However, Blue seems to be [[TalkingAnimal the only creature in her world who can't talk]], so the only way she can communicate with her human owner is by playing ''Blue's Clues''- a game in which she will tag 3 objects around the house (or backyard) with her blue pawprint, labeling them a "clue." It's up to her owner--along with all the kids at home--to figure out what she wants to do by piecing together these clues.

First introduced in 1996, the show is notable for [[TropeCodifier pioneering]] the kid's show version of an InteractiveNarrator--one who talks "to" the camera, seemingly at the children watching. ''Blue's Clues'' was so successful, this went on to become the norm for most kid's show hosts today-- especially those directed at the "Under 6" age bracket. It also originally ran under the notion that children learn through repetition--so the same episode of the show would run for a full week. (The show no longer practices this.) It was ''hugely'' successful, leading to several direct-to-video movies, an eventual SpinOff called ''Blue's Room'', and, of course, heaps and heaps of [[TheMerch merchandise.]]

The show was originally hosted by Steven Burns as "[[TheDanza Steve]]", but he left the show after six years. [[note]]A large number of rumors swirled about the reasons why, from death hoaxes to heroin overdose. The truth was a number of the production staff had turned over and he felt ready to move on. In addition he was [[PrematurelyBald losing his hair]] and was afraid of going bald on a kids show and seeming too "old" to the kids. He also wanted to pursue a career in music - and he has been successful in indie rock circles thanks to his connections with his friends, the Music/FlamingLips.[[/note]] His replacement was [[SuspiciouslySimilarSubstitute "Joe"]] (Donovan Patton), his TV younger brother, who ran the show, and its spinoff ''Blue's Room,'' until 2006, when production came to a halt. Reruns are now seen on the Creator/NickJr channel, and [=DVDs=] still exist.

On March 6, 2018, it was announced that Nickelodeon will make a CGI reboot of the franchise. It will still have a live-action host, though, and to that end, Nick has put out an open casting call. Auditions will take place in several locations throughout the US starting with their Burbank, CA studio in April 2018, with filming set to begin in the summer.
!!This show provides examples of:
* AbsenteeActor: Sidetable Drawer was missing from "Blue's Big Car Trip," and Mailbox was missing from "Blue's Big Car Trip," "The Legend of the Blue Puppy," "Skidoo Adventure" and "The Fairy Tale Ball."
%%* {{Adorkable}}: ''Steve.'' Also applies to the real-life Steve Burns.
* UsefulNotes/AdobeFlash: Until Blue's Room, all the animated parts were animated this way. Thus, it is the first Nick show to use Flash. (At least on the whole network. ''WesternAnimation/KaBlam'' was the first show to use Adobe Flash on the regular Nick schedule).
* AmazingTechnicolorWildlife: Blue is the current trope picture. Not only that, but she is probably the TropeCodifier too, and just in case you're totally color-blind, most colorful animals tend to be ''named'' after their color as well.
* AnimateInanimateObject: Aside from Steve, Joe and the animals [[note]] Blue, Magenta, Periwinkle, Orange Kitten, Green Puppy and Purple Kangaroo [[/note]], most of the characters are talking things.
** Heck, there's even a ''computer mouse cursor'' that talks in one episode!
* AnthropomorphicFood: Mr. Salt and Mrs. Pepper, their children Paprika and Cinnamon, and numerous other characters.
** A minor example with the monster cake.
* ArgumentOfContradictions: In "Blue Goes to the Beach," Mr. Salt and Mrs. Pepper have an argument over whether a straw will sink or float in water. Mr. Salt thinks it will sink, Mrs. Pepper is convinced it will float. Mrs. Pepper is right, as is found out when Steve reasonably suggests that they just try it and see what happens.
* ArtEvolution: In the book releases. Take a look at the earlier ones and you'll find that Blue's face is a bit chubby and the blue coloring is rather dark. Then take a look at the later book releases - the coloring is lighter and Blue's face has been thinned out. This generally holds true for the other characters as well and there are other, more subtle changes to the appearance of the art.
%%* AudienceParticipation
* BigLittleBrother: Joe to Steve in-universe. He is called a "little" brother of a college student but looks like an adult.
* BilingualBonus: Once American Sign Language is introduced in "Signs," the signs for "first," "second," "third," "thank you," and "smart", among others, are incorporated into the show's routine.
* BlueIsHeroic: [[ExactlyWhatItSaysOnTheTin Blue.]] While she doesn't ''wear'' blue, she is the main character and has blue fur.
* BookEnds: Literally. The show apparently takes place inside a ''Blue's Clues'' book.
* BreakingTheFourthWall: Steve and Joe talk to the viewers.
* BreakoutCharacter: In two book releases, minor character Green Puppy is a main focus.
* BrotherSisterTeam: Shovel and Pail are siblings and are almost never seen seperately.
* CarnivoreConfusion: Periwinkle (a cat) was best friends with Plum (a bird) back when he lived in the city.
* CatchPhrase: "Bark bark bark!" (said with the same inflection as "No you don't!", to clarify)
** "A clue, a clue!" - Said by the pre-recorded children's voices whenever a clue is spotted.
** "We just figured out Blue's Clues!" - When the clue is solved.
** "Blue skidoo'd, we can too!" - When the host is about to skidoo (jump) into whatever Blue went in.
* CharacterTics: When Blue is happy, she will often squint her eyes and run in place.
* ChekhovsGunman: Turquoise, the turtle Steve bought for Blue in "Blue's Birthday," turns out to be the answer to that episode's game of Blue's Clues (a turtle[[note]]Granted, she didn't specify a ''certain'' turtle, but...[[/note]]).
* ComicallyMissingThePoint: In the early episodes, whenever Steve goes to the Thinking Chair to resolve the episode with the given clues, he usually makes a bizarre guess, like Blue putting a cow in a cup and slurping it up with a straw (she just wanted milk), or wrapping a pillow in a blanket and reading it a story (she only wanted a nap).
** Steve and Joe can sometimes be like this whenever the audience is trying to tell them about a clue nearby.
* ContinuityNod: In an early episode, Steve bought Blue a pet turtle (named Turquoise) for her birthday. Turquoise shows up in the background of most scenes set in the bedroom after that.
%%* CoolBigBro: Steve to Joe.
* CouchGag:
** In Steve-era episodes, what Blue hides behind in the intro is always different.
** Joe-era episodes, on the other hand, have him wear a different colored shirt every episode.
** Something consistent across almost every episode is what's in the picture frame in the living room. Sometimes it even changes between scenes.
* CrossReferencedTitles: "Colors Everywhere!," and, a little further down the line, "Numbers Everywhere!"
* CuteKitten: Blue's classmates Orange Kitten and Periwinkle are of the TalkingAnimal variety.
* CuteLittleFangs: Green Puppy has fangs, being a dog, and she's cute due to being a puppy.
* {{Deconstruction}}: The ''Blue's Big Musical'' deconstructs how the kids always found the clues with Steve's subplot about finding a Blue's Clue all by himself and the frustration that Steve gets when he's unable to do it himself. Thankful, everyone cheers him up to continue and he finds the last clue all by himself.
%%* DemotedToExtra: Poor Magenta (and Green Puppy, and Purple Kangaroo, and Orange Kitten...)
* TheDiaperChange: Cinnamon gets his diaper changed several times. [[spoiler: This was actually the answer to a game of Blue's Clues at one point.]]
* TheDitz: There's always at least one clue in the show (sometimes ALL THREE) where Joe or Steve will ask the kids if they see a clue, or where it is. It takes three times for him to FINALLY understand what the kids are saying. ("A clue!" "A shoe? Yes, I'm wearing shoes." "No, a clue!" "You, too?" "No, a clue!" "Oh! A clue! Right over there!")
** "Math!" has a variation: The first clue is an ice cube. However, Steve just got done counting ice cubes in a tray (10 to be exact)... and is about to have a heart attack over the prospect of 10 clues.
** Similarly, a clue is seen on a carton of orange juice in "Blue's Surprise at 2 O'Clock". Steve just drank some after being told of the clue. Cue Steve thinking ''he drank the clue''.
* EarlyInstallmentWeirdness: In the early episodes, Steve was much more excitable, and during Mail Time, he would say each kid's name, instead of using the all-encompassing term of "our friends".
* EndingTheme: At the end of each episode, they would sing "It's time for so long but we'll sing one more song. Thanks for doing your part, you sure are smart, y'know with me and you and my dog Blue we can do anything that we want to do."
* ExcitedKidsShowHost: Steve goes (very close to) BERSERK when he finds a clue for the first time.
* ExploitingTheFourthWall: As part of the fake interactivity, Steve or Joe would sometimes pass an object back or forth between them and the viewer(s).
-->'''Steve:''' This sounds like it'll be tough, so I'm really going to need your help today? Will you help? ... You will? Great!
* FakeInteractivity: Along with ''WesternAnimation/DoraTheExplorer,'' this was one of the early Nick Jr. shows that popularized the idea. Usually, pre-recorded children's voices would answer the question. Host Steve or Joe (Kevin in the U.K. and Duarte in Portugal) would keep up a running dialogue with the viewer, who was supposed to help figure out the clues to the game of Blue's Clues. A typical line of dialogue...
* {{Foreshadowing}}: An example is implemented in "Blue is Frustrated": The first clue, the sink, is discovered (and drawn) from the floor looking up, making it look like the sink is taller than it is. The answer to this game of Blue's Clues is that Blue is frustrated over trying to brush her teeth... because ''she can't reach her toothbrush''.
* FreakyFridayFlip: "Joe's Clues" has Blue and Joe switch places.
* HappilyMarried: Mr. Salt and Mrs. Pepper (who have two children Paprika and Cinnamon) are a happy couple and whenever they're angry, it's not at each other.
* HiddenTrack: The album "Goodnight, Blue" has a bonus at the end called "Hidden, Blue's Dream" that isn't listed on the album itself, though plays as a separate track. There's just under two minutes of night noises and snoring before the dream part actually starts.
* ICantHearYou: This is done in "Nature!" between Steve and the voice of the kid used to represent the viewer when the viewer discovers a waterfall and tries to point it out to Steve, but he says that he can't hear because there's a loud waterfall. Also, it's a fairly common RunningGag on the series for either Steve or Joe to mishear when the voice says "A clue!".
* IntelligibleUnintelligible: Every dog character spoke in a kind of canine whine that the viewer couldn't understand but all the other characters seemed to understand fine.
%%* InteractiveNarrator
* LadyLooksLikeADude: Steve generally believes Green Puppy (a bulldog) to be male.
* LampshadeHanging: In one episode, one of the clues was a ''cloud''. Right before drawing it down, Steve wonders how Blue could put her paw-print on it.
* {{Licensed Game}}s / {{Edutainment Game}}s: Two were released during the show's popularity peak: one for the UsefulNotes/PlayStation and one for the UsefulNotes/GameBoyColor. Later on, there was one released for the V-Tech V-Smile plug-and-play learning system. Apart from that, nearly a dozen edutainment titles for the PC/Mac (many of them by Creator/HumongousEntertainment--a demo version of ''Blue's ABC Time Activites'' can be [[ftp://ftp.infogrames.net/demos/bluescluesABC/bluescluesABCdemo.exe downloaded]] from Infogrames). Many of them were surprisingly good.
* LimitedWardrobe: Steve wore nothing but green striped shirts and khaki pants. All of Joe's shirts are different colors, but they have the same square pattern.
* MatryoshkaObject: One episode has Steve opening a present with an increasingly smaller present inside each one.
* MerchandiseDriven: All types, from shampoo to plush toys (some, such as the Shovel and Pail Eden plush, are very rare) to model Thinking Chairs. There were also dry-erase Handy Dandy Notebooks, [[http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l2632.R2.TR3.TRC1.A0.H0.Xhandy+dandy+notebook.TRS0&_nkw=handy+dandy+notebook&_sacat=2624 of which the non-dry-erase replicas are easy to find on eBay]].
* MockingSingsong: Inverted in "Magenta Comes Over". Everyone at the house is so eager to have Magenta as a guest that they break into a short song and dance whenever it's discussed. The tune carries over when Magenta finally shows up.
* TheMovie: ''Blue's Big Musical Movie'', the only direct-to-video movie for the show.
%%* NerdGlasses: Magenta gets these near the end of the third season.
* NoFourthWall: The people on the show would often query the "audience" on the answer to the show's questions and puzzles. Not to mention Blue pawprints the screen in the beginning of an episode.
** One interesting example: One time after Steve greets the viewer, he asks how they "got" there. The conclusion he reaches? "Oh, by ''television''. ''([[ScreenTap knocks on the screen]])'' Cool!".
* NotAllowedToGrowUp: Averted with Paprika and Cinnamon. They both started out as babies who couldn't talk (having been born during the series), but over time, they started acting more like little kids instead of babies. By the end of the series, Paprika was speaking full sentences like the rest of the cast, and Cinnamon knew some words.
* OnceAnEpisode:
** The mail arriving.
** Sitting in the Thinking Chair to figure out the clues, and when they have, singing about it.
** The "one more song" they sing at the end.
* PinkGirlBlueBoy: A notable subversion as Blue and Magenta are both girls.
* PortalPicture: Blue, Steve, and Joe can all "Skidoo" into pretty much any picture around and interact with the residents.
* PutOnABus: Steve (literally), when he went off to college. He sometimes comes back, though.
* RealTime: The show gave every appearance of taking place in real time. Viewers follow host Steve or Joe (or Kevin in the U.K.) through events in the ''Blue's Clues'' house and backyard, or into skidoo, without cutting away or any indication of additional time passing. In one installment, viewers even sat with Steve for one minute as a clock appeared on-screen counting down one minute as an exercise in patience. Another installment with Joe, "Patience," was all about finding ways to be patient to pass the time until an egg hatched at the end of the episode. There was even a song to go with it-- "''Wait. Wait. Wait.'' What can we do while we wait?"
* ReTool: From the beginning, the ''Blue's Room'' spin-off never really caught on. So when they made it into a full series, they made several changes. The biggest was adding Blue's new baby brother Sprinkles as a regular member of the cast. Joe was also given a more prominent role and the sets were expanded. It still didn't work and the program ended once its episode order was up and has rarely been seen in repeats since.
%%* RidiculouslyCuteCritter
%%* RogerRabbitEffect
* RuleOfThree: The viewer is always expected to find three clues.
** There are also three pink snails hidden in the background of every episode for older viewers to find.
* RunningGag:
** In "What is Blue Afraid Of?," Steve and Blue skidoo into a mansion with a ghost, Boo, who's afraid of his own name. Whenever Steve says it, the ghost gets frightened. Steve eventually catches onto this and starts getting quite a kick out of saying the name and watching the ghost jump in fright.
** There's also the joke about Steve mishearing "A clue!".
* SelectiveLocalisation: UK viewers of Blue's Clues might be puzzled to hear Steve mentioned constantly - this is because in the UK imported version of the show, a different actor known as "Kevin" was used on and interacted with the same animated backgrounds that were used in the United States version. Kevin and his stripy green shirt are just as fondly remembered in the UK as Steve is in the United States.
* SlipperySoap: Literally, there is a character with this name. And he just happens to be a sentient bar of soap who slips around alot with the catchphrase "Woooaaah!"
* SomethingCompletelyDifferent: In "Meet Polka Dots," Blue opened the door to the Blue's Clues house and there were several segments in which time was spent with just Blue or Blue and her friends rather than Joe, while Joe attended to his stuffed duck Boris, who was having a nap. Perhaps most unusually, viewers got to actually watch as Blue placed her pawprint on each clue, something which had always been done firmly off-screen before.
* SpinOff: ''Blue's Room,'' which swaps out most of the main cast save Blue and Joe for puppets. Oh, and [[SuddenlyVoiced Blue can talk now.]] Some older fans are not pleased with it.
%%* SpotlightStealingSquad: Sidetable Drawer (somewhat).
* StockSoundEffect: ''Baby Kate Cry'': Variant in the 4th part of the story in Season 4 "The Baby's Here!", there were some babies crying at the Baby Hospital, and one of them was crying like this.
** The ''Oggy Cry'' was also used as well.
* SuddenlyVoiced: Blue in the ''Blue's Room'' spin-off series. Additionally, in the book releases, Blue was suddenly voiced before ''Blue's Room'' even started. Seriously, pick up any of the more recent numbered ''Blue's Clues'' book releases not set within the world of ''Blue's Room'' and you'll find that Blue actually talks out loud to Joe, Green Puppy, Magenta and everyone else. This was true even in some of the Steve books.
** Of course, astute viewers might note that Blue always ''could'' talk. Seriously, some of those barks were so specific that she pretty much was talking if you were clever enough to figure out what she was saying.
** The clues, beginning in "Blue's Neighborhood Festival" were no longer drawn by Joe but seemingly drew themselves as if by magic, then talked and sung a little song.
* SurpriseParty: "Joe's Surprise Party," in which the viewers are asked to keep Joe distracted while Blue and the cast finish putting together a surprise birthday party for him. It works out very well.
* SuspiciouslySimilarSubstitute: Steve's replacement, Joe. They're brothers and they act pretty much alike.
* TakeYourTime: Blue wants a snack, but won't tell us what that specific snack is. We have to waste god-only-knows how much time playing Blue's Clues to find out what snack she wants. (She must not have been ''that'' hungry. Downplayed and in some instances justified, because all episodes seem to take place in RealTime, so we can be sure that things will be resolved in less than 20 minutes, which isn't that long. And besides, Blue's Clues is, as Steve and Joe point out, ''a really great game''.
* TertiarySexualCharacteristics: The show actually makes a concentrated effort to ''avoid'' this. Almost all of the characters have non-gender-specific features, and all of them speak with the wholly androgynous voices of small children. It's actually more likely for random characters to be ''female.''
* ThatCloudLooksLike:
** This is the answer to Blue's Clues in "Nature!", that Blue wants to do this as a game.
** In the book release ''Blue's Backyard Mystery'', Blue and her friends Magenta and Periwinkle play the "Cloud Game" at Blue's suggestion. Blue sees a boat, Magenta sees a dinosaur and Periwinkle sees a banana.
* ThatMakesMeFeelAngry: This is often used and is often combined with the show's particular brand of FakeInteractivity. There were also at least a couple of episodes specifically about feelings and, of course, this trope was right at the fore. A typical example of how this might go...
--> '''Joe:''' So, tell me, do you think Felt Friend Sam is feeling happy, or sad? ... ...
--> '''Kid's Voice:''' Sad!
--> '''Joe:''' That's right! Sam is sad because Anna wouldn't share with him.
* ThrowTheDogABone: Well, technically the human. In ''Blue's Big Musical,'' Steve suddenly realizes that he's ''never found a clue on his own without the help of the kids.'' He's sorely depressed about this fact until he looks inside of a box (that the camera can't see in) and realizes--''there's a clue in there! He found it himself!''
* TitlePlease: In the earlier episodes, the episode titles didn't appear within the episodes themselves. Averted once the show started using "Another Blue's Clues Day"; near the end, Mr. Salt and his family would appear holding a banner with the episode's title, and Mr. Salt would read the title to the audience.
* TitleThemeTune: "Another Blue's Clues Day." They didn't start using it until after Joe became host, though. Up until then, a simple instrumental theme was used to lead into the program.
* ToiletHumor: The Toilet Song in Morning Music, even mentioning pee and poo.
%%* TomboyAndGirlyGirl: Blue and Magenta.
* TrademarkFavoriteFood:
** Sandwiches and milk for Blue.
** Milk and orange juice for Paprika.
* TrailersAlwaysSpoil: At least one promo for an episode actually gave enough information for especially astute viewers to figure out the answer to Blue's Clues before the episode ''had even started''.
* TrueBlueFemininity: Blue is a girl.
* UniversalDriversLicense: In "Away Great Playdate" on ''Blue's Room'', Joe conducts a train, drives a taxi and pilots a plane.
* UnwantedGlassesPlot: Inverted in "Magenta Gets Glasses," which was also released as one of the books.
* VagueAge: The brothers, mostly Joe. Acted by men but they behave like boys but apparently live alone. Steven goes off to college so he's an adult, and likely Joe is, too.
* VariableMix: When the clues are reviewed using the notebook, each clue is accompanied by music. Each clue is accompanied by its own melodic line when mentioned, and together, they harmonize.
* ViewersAreGeniuses: Later episodes often covered topics that had been dealt with before, but rather than just being some rehash, they introduced new material. For example, the "Colors Everywhere" episode covered the familiar topic of mixing colors, but took it the new level of showing how the mixed colors could then be mixed ''with each other'' to create even more new colors. "Chartreuse, a color I had not seen, looks to me like a yellowish-green. ... Mix blue and yellow and they're suddenly green. Then blue and green makes aquamarine."
* WhatHappenedToTheMouse: Why exactly was there [[MemeticMutation a sock in a bakery?]]