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->''Losing him was blue like I'd never known''\\
''Missing him was dark grey all alone''\\
''Forgetting him was like trying to know somebody you've never met''\\
''But loving him was red''
-->-- '''Music/TaylorSwift''', "Red"

An emotion a character is experiencing can be identified by what colour the character, or whatever they have is or turns in to. A [[HighPressureEmotion character might turn red when they are angered or embarrassed]], yellow when happy, or blue when sad. The background might even change to the same colour the person is. Sometimes, a character will change clothes to reflect what they feeling that particular day. Someone with an AuraVision might be able to tell what mood another person is in by the colour their aura emits.

The trope is pretty old as the SevenDeadlySins originally had colors associated with them. Envy is green (yes, that's where the whole GreenEyedMonster idea came from), Lust is blue (in some languages, a porno is actually called a "blue film" and a horny person is said to have a "blue mind"), Pride is purple (the color of royalty), Wrath is red, Gluttony is yellow and Sloth is light blue.

Here's a list of colours commonly used to identify several emotions:
* Red: Anger, embarrassment, passionate, and lustful.
* Blue: Shyness, sadness, and calmness.
* Yellow: Cowardice, happiness, or caution.
* Green: Disgust, envy, sickness, friendly, or greedy.
* Grey: Depression and emotionless.
* Black: Cold or mournful.
* Pink: Cheery, embarrassed, and love.
* White: Sick, shocked, scared, cold, and mournful

A subtrope of ColourCodedForYourConvenience. See also BlueWithShock, ColourFailure, HighPressureEmotion, and KaleidoscopeEyes.

[[folder:Anime & Manga]]
* In ''Manga/AhMyGoddess'', Belldandy can see Keichi's moods as colored auras.

* "Suicide - Blue", "Homicide - Red" and "Genocide - Yellow" from the ''Patchwork Horrorshow'' portfolio from [[Creator/AzaSmith Aza Smith's]] ''Website/GrindhouseAndWatercolorsTheRevulsionAndTerrorOfAzaSmith'' fit this criteria.
** "Suicide - Blue" shows depression, using blue as the color of tears.
** "Homicide - Red" shows rage, using the color of blood.
** "Genocide - Yellow" shows apathy, using the color of bile and poison.

[[folder:Comic Books]]
* The ''ComicBook/GreenLantern'' series has the Emotional Spectrum, which associates a specific color to an emotion, and these emotions are what power up the lantern rings. Red is Anger, Orange is Greed, Yellow is Fear, Green is Willpower, Blue is Hope, Indigo is Compassion, and Violet is Love. There is also White and Black, representing Life and Death itself.

[[folder:Fan Fiction]]
* Water elementals shift colour according to their mood in ''FanFic/DiariesOfAMadman''. Within the dream realm, dreams are also coloured according to the type of dream it is, and the emotions of the dreamer.

[[folder: Films - Animation]]
* ''Animation/TheMysteryOfTheThirdPlanet'' had an animal which changed color depending on emotion.
* Disney/Pixar's film ''WesternAnimation/InsideOut'' has the emotions be color-coded: Joy is yellow, Sadness is blue, Anger is red, Disgust is green, and Fear is purple.
* ''WesternAnimation/{{Home}}'':
** The [[BizarreAlienBiology Boov change colors]] to reflect emotions. Red is anger, yellow is fear, orange is happiness, blue is sadness, and pink seems to be affection. In addition, they turn [[CannotTellALie green when they lie]].
** Although it's possible that only Oh turns green when lying, or that the tell is present in only some Boov or can be avoided, as Smek lies to the Boov in his announcement, trying to prevent them from worrying about Oh's email and the Gorg, but he doesn't turn green.

[[folder: Literature]]
* Drones in ''Literature/TheCulture'' often display a coloured force field to show what mood they're in: blue for formal, white for angry, red for pleasure and [[http://www.iainbanksfaq.co.uk/2008/12/what-are-various-emotion-colours-given.html so on]].

[[folder: Music]]
* ''Music/BlueTrain'' by Music/JohnColtrane. The album cover is blue, just like the title and the title track. Coltrane is shown contemplating, suggesting he's feeling blue.
* ''Music/BlueJoniMitchellAlbum'' by Music/JoniMitchell has a blue colour for the same reason as the album example above.
* ''Music/Colors'' by Music/Halsey, discussing the color gray, its relation with depression and how that all affects Matty Healy from The 1975.

[[folder: Tabletop Games]]
* {{Warhammer}} and ''TabletopGame/Warhammer40K'': The four Chaos gods are the embodiments of a specific emotion felt by sentient creatures. Khorne (rage) is red, Tzeentch (hope) is blue, Slaanesh (desire) is either pink/purple, and Nurgle (despair) is green.
* In ''TabletopTop/MagicTheGathering'', this is used to [[CrowningMomentOfFunny hilarious]] effect in [[http://magiccards.info/eve/en/76.html Swirling Spriggan]]. Otherwise averted, however: emotions fall strictly under [[ColorCodedMagic Red]], though characters aligned with other colors obviously feel emotions.

[[folder: Video Games]]
* In ''VideoGame/{{Fallout 2}}'' with the Empathy perk you see in blue what responses will get a calm reaction, red for anger, and the regular green for neutral.
* ''VideoGame/GoldenSun'' uses little emoticons to represent character's emotions. Red for angry, yellow for happy, and blue for sad.
* In VideoGame/StarWarsTheOldRepublic the Sith Warrior and Inquisitor, classes that draw their power from rage, glow red when using their 'recovery' move. Jedi doing an equivalent move glow golden or blue instead.
* In ''VideoGame/{{ZooTycoon}}'', your animals have colored emoticons appear over their head to indicate their mood at certain times.
* In ''SuperPrincessPeach'' her vibe powers are represented by colored hearts: Yellow for joy, green for calmness, red for rage and blue for sadness. On the same vein, enemies will be colored the corresponding color when they are affected by one of the vibes.

[[folder:Visual Novels]]
* Athena Cykes from ''VisualNovel/PhoenixWrightAceAttorneyDualDestinies'' has Widget, a necklace computer that aids her in [[TheEmpath reading the emotions of others]] and [[ExpressiveAccessory defaults to her own emotions]]: red for anger, green for joy or happiness, yellow for shock or surprise, and blue for sadness or fear.

[[folder:Western Animation]]
* An episode of the ''WesternAnimation/{{Aladdin}}'' TV series had the characters enchanted by colored gemstones which instilled them with corresponding emotions--blue for depression, green for envy, yellow for fear, etc.
* An episode on ''WesternAnimation/TheAdventuresOfJimmyNeutron'', where Jimmy gets banned in the science fair, features a device that detects emotion through colour and music genre. For instance, when Cindy feels happy, the device shines yellow as it plays a sunny tune; when she spots Jimmy, the colour turns red as the music shifts to heavy metal; and while she feels regret an