The use of filters or digital post-processing to change the tint of the film. Common techniques include ColorWash.

Sometimes, this is used to create a particular mood -- a washed-out, desaturated look creates a bleak atmosphere, while bright colors seem "happy" and naturally inviting, and orange is used in "sunny" places such as deserts or beaches. Other times, it's used to emphasize [[ColorContrast two contrasting colors]] [[RuleOfCool to look more appealing]], usually [[OrangeBlueContrast blue and orange]]. [[http://www.slashfilm.com/2009/11/27/orangeblue-contrast-in-movie-posters/ Especially]] [[http://www.cracked.com/article_18664_5-annoying-trends-that-make-every-movie-look-same.html blue]] [[http://theabyssgazes.blogspot.com/2010/03/teal-and-orange-hollywood-please-stop.html and]] [[http://theabyssgazes.blogspot.com/2010/03/teal-and-orange-part-2.html orange]].

This is OlderThanTelevision. Silent films used color tints to distinguish day and night, interiors and exteriors, and different moods. ([[http://en.wikipedia.org/wiki/Film_tinting#Common_tints The Other Wiki]] lists some of the conventional correspondences.)

UnnaturallyBlueLighting is often a signature of science fiction works. When overused it can results in both glare and loss of detail in a scene.

See also HollywoodDarkness. RealIsBrown (a brown tint applied to videogame graphics) and RedFilterOfDoom (red tinting to create an ominous atmosphere) are subtropes. See also PostProcessingVideoEffects.

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!!Examples:

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[[folder:Media in General]]
* More generally, it's a common trope in both film and television to shoot New York City through a blue filter to make it look depressing, gritty, and urban, and to shoot California through a yellow or red filter to make it look sunny and cheerful.
** Sometimes the yellow or filter is to make it look sunny all right--but not cheerful, but hot, therefore depressing, gritty, and urban.
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[[folder:Advertisements]]
* Nearly ALL adverts for holidays will have some kind of yellow tinge to give the impression that it's sunny all the time.
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[[folder:Anime and Manga]]
* The red room attack scene in ''SoukouNoStrain''.
* Some of the more serious scenes in ''Anime/{{Popotan}}'' have a red/orange tint to them. Most of them can be explained by the scenes taking place at sunset, but it happens so often that it's probably not a coincidence.
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[[folder:Comic Books]]
* ''ComicBook/PrinceOfPersiaTheGraphicNovel'' generally distinguishes the two time periods it takes place in by tinting the past yellow and the future a dusky purple.
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[[folder:Film]]
* An example of using this technique well can be found in Soderburg's ''Traffic'', where scenes in the US were shot with a blue filter and scenes in Mexico were shot through sienna.
* The movie ''Film/SleepyHollow'' was shot almost entirely with a creepy bluish filter to enhance the horror atmosphere of the setting. Only at the end when the threat is past does the filter shift to a warm color (ironically, in New York City...)
* In ''Film/TheMatrix'', scenes inside the Matrix are shot with a green filter, while scenes in the "real world" are shot with a blue filter.
* ''Film/TheAdventuresOfPicasso'' uses this in the [[http://www.youtube.com/watch?v=LWheSfRs7gE scene in Sirkkas home]] (from 3:10 and about one more minute), switching between full-colour and black-and-white.
* Director Mario Bava was known for using colored lights -- often in ''non sequitur'' shades of green or purple -- to create a mood of unease.
* The Mamoru Oshii film ''Film/{{Avalon}}'' has everything tinted brown, until one sequence which brings up the possibility that it's real and the rest of the film isn't. [[spoiler:This possibility ends up not being true]].
* The entirety of the Creator/MelGibson gangster film ''Payback'' was seemingly shot in Chicago at the height of Blue Filter Season to emphasize how grim the film was. But an alternate director's cut version (''Payback: Straight Up'') reveals that most of the mood lighting was a post-production effect due to ExecutiveMeddling.
* The movie version of ''SouthPacific'' is an infamous example of color tinting gone wrong, a mistake which haunted director Joshua Logan for the rest of his life.
** The "plot" part of the movie is shot normally, the musical numbers are tinted. The overall impression is that the characters have some kind of disease that periodically gives them either a rash or jaundice while also making them spontaneously break out in song.
* ''Film/BattlefieldEarth'' overused color filters, as well as [[DutchAngle weird camera angles]].
* ''Film/CityOfAngels'' (with NicolasCage) used a lot of sunset/sunrise tones.
* Every shot in ''SinCity'' invokes this trope due to CityNoir roots and the shot-for-shot nature of recreating a comic book in live action.
* The film ''Thirteen'', noted on the DVD commentary, was shot with warmer colouring when the girls are partying and colder, more stark lighting as things fall apart.
* Christiane F is mostly green-tinged. This might be deliberate on the part of the film-makers (since it's about drug addiction), but it looks largely shot under fluorescent lights (in subway stations, etc.), due to budgetary restraints. This will give a green tint to film if not corrected with filters.
* For Creator/JohnCarpenter's original ''Film/{{Halloween 1978}}'' in 1978, cinematographer Dean Cundey used color filters to cast daytime scenes in brown (to evoke Midwestern autumn in the [[CaliforniaDoubling California-shot]] exteriors) and nighttime scenes in blue (to evoke a supernatural eeriness). A high-res DVD release in 2003 "[[DigitalDestruction fixed]]" the color timing, much to the consternation of both Cundey and the fans.
* ''{{Chopper}}'' has all kinds of uncomfortable lighting, including [[UnnaturallyBlueLighting unnatural blue]], [[SicklyGreenGlow sickly green]], and [[BlueOrangeContrast lurid orange/blinding yellow]].
* ''Film/{{Hero}}'' might have this along with the color-coded flashback costumes.
* In ''Disney/TheLittleMermaid'', the grotto turns hellish red when King Triton is destroying it, followed by turning a light chalky gray afterward,.
* ''Film/ManOfSteel'' has a dark bluish tint when Clark is out in the world, while Smallville scenes use yellowish lighting instead.
* ''Film/MarginCall'' has a predominantly blue tint as the film is set predominantly at night, amplify the growing realization of what was about to happen to the firm, and to emphasize the fact that the only available lighting are the glow of the computer screens and fluorescent lights.
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[[folder:Live-Action TV]]
* ''Series/CSIMiami'' seems to have incorporated another shows use of this trope in its PoorlyDisguisedPilot for ''Series/CSINewYork''. When the camera focused on Mac Taylor (the NY character) it looked darker, while shots of Horatio Caine were brighter.
* During the first season of ''Series/{{Heroes}}'', MoodLighting was used to differentiate the different regions that the show took place in. New York was blue, Texas was gold, Nevada was bleached out, etc. This was dropped in the second season.
* Used in the ''Series/{{Firefly}}'' episode "Out of Gas" for flashbacks more than a day or two previous.
* In ''Series/{{Dexter}}'', the kill scenes are usually shot with green gels on the lights to create a sickly or monstrous appearance for the character. In addition, bold red lighting is sometimes used in relation to kills.
* Done frequently in Series/PowerRangers to suggest an AlienSky. The moon usually uses blue tinting, a volcanic planet uses red tinting, and in Series/PowerRangersRPM, the earth post-nuclear RobotWar uses a yellow tint.
* ''Series/VeronicaMars'': One of the notable differences between the Season 4 pitch and the rest of the show was the drastic change in mood lighting. Neptune, Neptune High and Mars Investigations all had very orangey, red warm hues--whereas the FBI office Veronica was slated to work in was all white, blue and cool chrome.
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[[folder:Pinball]]
* Featured in Creator/JerseyJackPinball's ''Pinball/TheWizardOfOz,'' which uses color-changing LED lighting to change the playfield colors according to in-game events. For instance, the table turns red when the Winged Monkeys attack.
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[[folder:Video Games]]
* Several video games use the graphics card to give the entire scene a certain lighting effect:
** Crank up the visual treatment in ''NeedForSpeed Most Wanted'', and you'll see how the entire world is seen through a yellow tint and a lens vignette effect to make it feel like a rough, gritty city during the day.
** Likewise, if you turn on the Over Bright and the Enhanced Contrast in ''Need For Speed Underground 2'', you'll see how the dark parts become darker while the light parts become glaring, in order to accentuate the shiny lights of the city and the cars.
* What's your favourite ''Franchise/MetalGear'' level design - grey buildings with a blue tint (''VideoGame/MetalGearSolid''), grey ship with a green tint (''VideoGame/MetalGearSolid2''), orange buildings with a green tint, averaging out to grey (''VideoGame/MetalGearSolid2''), green trees and buildings with a yellow tint (''VideoGame/MetalGearSolid3''), or [[RealIsBrown brown brown with brown]] and a brown tint (''VideoGame/MetalGearSolid4'')? ''VideoGame/MetalGearSolidPeaceWalker'' has conventional (if perhaps a little psychedelically bright) colours in a conscious attempt to break away from using this trope, as did ''VideoGame/MetalGearRisingRevengeance''.
* Although the areas are often [[PatchworkMap right next to each other]], ''VideoGame/WorldOfWarcraft'' colors the sky (and the artificial fog of the area if you don't have maximum distance set on your visual settings) of many of its areas to fit the type of area. For example, the sky is colored orange to fit a burnt or volcanic area, the Eastern and Western Plaguelands have a reddish-brown tint and yellowish-brown tint respectively to give off an infected, ravaged feel; and Shadowmoon Valley has a yellow-green sky to match the green lava of the area. And with ''Wrath of the Lich King'' comes Icecrown, which has gloomy dark blue lighting to match the pure ice wasteland. Thus moving past a zone border can turn previously-clear lakes to sickly green, for example.
* In ''VideoGame/{{Psychonauts}}'', this becomes a gimmick in one of the levels which takes place in a theater that plays the memories of [[WhiteDwarfStarlet Gloria Van Gouten]]. By using the lighting, one can induce MoodWhiplash upon the scene, changing it in order to progress.
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[[folder:Western Animation]]
* ''TheMarvelousMisadventuresOfFlapjack'' uses this a lot; for example, the colors on Cammie Island are much darker, in the morning are yellowish, and in the West are all red and black.
* Used in WesternAnimation/DannyPhantom: During any ghost attack the scenery changes colors, usually to a dark blue, purple, or red--though with the other "ghost" powers on the show, it's plausible to HandWave it as an effect of ectoplasm on a human environment.
* The [[http://www.youtube.com/watch?v=hKoB0MHVBvM Diet Coke and Mentos experiments]] have a strong blue tint to the video, although this does not extend to the [[http://www.youtube.com/watch?v=9vk4_2xboOE sequel]].
* In WesternAnimation/ThePowerpuffGirls episode "Tough Love", the city of Townsville turns a hellish red when everyone (sans the girls) is under HIM's control.
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