[[quoteright:150:http://static.tvtropes.org/pmwiki/pub/images/VELENO_6890_2_5915.jpg]]
[[caption-width-right:150:[[VideoGame/KingsQuestV "Watch out! A]] [[AccentUponTheWrongSyllable pOIsonous]] [[VideoGame/KingsQuestV bottle!]]"]]

In RealLife, poison is usually detected and identified thanks to its bitter taste and/or smell. But how can we identify a poison as such in works like anime or video games, where taste and smell aren't an option?

Of course, the [[ColorCodedForYourConvenience color itself!]]

Eastern media tend to portray poisonous substances in a dark purple color, usually bubbling. In Western media, [[SicklyGreenGlow Sickly Green]] is more common because of the former popularity of Arsenates, which really are fluorescent green. There are also other works from both sides of the Atlantic showing poisons and venoms of various other colors.

BonusPoints if it's shown [[PoisonIsCorrosive melting stone]] and steaming foul vapors.

Thanks to these distinctive colors, the audience can [[RuleOfPerception instantly perceive whether a substance is toxic or not]]. This is a bit of TruthInTelevision, as shown below.

Seen often paired with PoisonedWeapons, PoisonousPerson and PerfectPoison. See also SicklyGreenGlow and PurpleIsTheNewBlack.
----
!!!Examples:

[[foldercontrol]]

!![[color:indigo:Purple Poison]]

[[folder:Anime and Manga]]
* ''Manga/{{Bleach}}'' features Mayuri's Ashisogi Jizo, which releases a purple poison cloud. The affected victims also turns purple. [[spoiler: Gin Ichimaru's true power release a deadly poison with a purple aura.]]
* [[MeaningfulName Cobra]] from Oracion Seis in ''Manga/FairyTail'' owns a violet giant snake named Cuberios which is poisonous and his/her victims turn slowly purple when bitten (seen in the anime with [[ActionGirl Erza]]). Also his Poison Dragon Slayer's scales are violet.
* In ''Manga/InuYasha'', Naraku's Shouki is dark purple, and is most certainly poisonous.
* ''Anime/{{Naruto}}'' features purple-colored poisons, seen with Shizune's BreathWeapon and Sasori's weapons.
* ''Manga/OnePiece'' has several instances of purple poison, including Crocodile's Hookhand, Wanze's BigFancySword, Marigold's spit, [[PetalPower Musshuru's spores]] and, of course, [[PoisonousPerson Magellan himself]]. Bonus point for having also the PoisonIsCorrosive effect and noxious steams.
** Later, during the Punk Hazard arc, Smiley's poison gas is clearly described as "purple", even if the comic is in black and white.
*** Smiley's anime appearance shows he's a [[AwesomeAnimation positively fabulous]] red-violet color rather than pure purple. The noxious gasses he releases are actually purple though. Smiley's master, Caesar Clown, utilizes light blue poison gasses with a purple hue, which turn completely dark purple when he goes OneWingedAngel.
* In the anime of ''VideoGame/SengokuBasara'', Matsunaga uses purple poison gas in order to take down Kojuro. In contrast the gas Sasuke uses as an antidote is green.
* Coco from ''{{Toriko}}'' can secrete purple colored poisons from his body. In the anime at least.
* {{Pokemon}} that have strong poisonous attacks are often depicted as purple, such as Grimer, Koffing, Ekans and their evolutions.
* The flesh-melting poison used by Fugo's stand Purple Haze in ''JoJosBizarreAdventure'' hasn't been seen in color in the manga, but ''JoJosBizarreAdventureAllStarBattle'' shows it as being purple.
[[/folder]]

[[folder:Literature]]
* In ''Literature/ASongOfIceAndFire'', when [[spoiler:Joffrey is poisoned at his wedding feast]], it's strongly implied that this was the work of the Tyrells, specifically CoolOldLady Olenna, who would have taken a poisonous stone disguised as an amethyst out of Sansa's jeweled hair net and dropped it in his cup of wine. One indication of this is that when Tyrion gets [[spoiler:Joffrey]]'s wine poured over his head, it's described as a "red torrent," but when he picks up the chalice after it's been refilled and drunk from, the remaining wine is purple.
* In ''TheSwordOfShannaraTrilogy'' the poison from the Creeper-like monster is described as purplish in color.
[[/folder]]

[[folder:Live-Action TV]]
* Cobra-themed Kamen Rider Ohja of ''Series/KamenRiderRyuki'' is conveniently purple.
** As is scorpion-themed Sasword in ''[[Series/KamenRiderKabuto Kabuto]]''. Purple poison actually drips from his weaponry as he attacks.
[[/folder]]

[[folder:Video Games]]
* Starting from ''VideoGame/FinalFantasyI'', almost all the games in the saga features purple swamps where you take damage as you walk.
* ''[[{{Onimusha}} Onimusha: Dawn of Dreams]]'' features purple poison for the first time in the saga. Poisoned characters turns purple too.
* In ''VideoGame/OdinSphere'', poisoned characters turn purple.
* ''SamuraiShodown'': a mismatched case: Gen'an's poison cloud is orange, but the poisoned victim becomes purple.
* In ''{{Genji}}: Dawn Of The Samurai'', the Poison element is Purple.
* In ''Anime/{{Pokemon}}'', the Poison elemental type has a purple icon, "Poisoned" status is also purple, and many Poison-type attacks (such as Toxic and Gunk Shot) are represented with a bubbly purple goop. Furthermore, many Poison-related Pokemon like Koffing/Weezing, Ekans/Arbok, Gastly/Haunter/Gengar, Nidoran/Nidorina/Nidorino/Nidoqueen/Nidoking, Zubat/Golbat/Crobat, Stunky/Skuntank, Skorupi/Drapion are violet in color.
* In [[SuperMarioBros Mario]] games, the purple shroom inflicts poison or disables the playable characters, depending on the game.
** In ''VideoGame/SuperMarioGalaxy'' and [[VideoGame/SuperMarioGalaxy2 its sequel]] there are swamps with purple gunk that instantly cause you to drown.
** The stronger version of the poison status in the ''Mario & Luigi'' games turns the brothers bright violet.
* In the ''DragonQuest'' series, poison swamps are always colored violet.
* The Miasma spell in ''VideoGame/FinalFantasyTacticsAdvance'' is purple.
* In the Cave level of the Subspace Emissary story in ''VideoGame/SuperSmashBros Brawl'', the poison gas you encounter is purple colored.
* Poison in ''ShinMegamiTensei'' games turns characters purple with violet bubbles coming off them.
* In ''Franchise/{{Disgaea}}'', poisoned characters are signaled with purple bubbles.
* In the VideoGame/{{Pikmin}} games, the spores from the Puffstool and the poison gas in the sequel are purple. The color coding is also used for (the more pinkish) Munge Dweevils, which are part of a family of enemies with ElementalPowers [[spoiler: as well as the [[FinalBoss Titan Dweevil]], when he's about to use his poison weapon.]] Oddly, ''White'' Pikmin are the type immune to the latter, while Purple Pikmin don't have a hazardous element they're immune to[[color:*:though they can't be blown by wind]], making Whites the only Pikmin who's color does not match that of their element.
* In ''VideoGame/CastlevaniaCircleOfTheMoon'', the poison status effect causes Nathan to take on a purple tint. Poisonous snakes, Poison Armors and other poison enemies are purple, fitting the games focus on [[ElementalPowers different elemental traits]]. The Manticore card applies the Poison element to your spells, which results in predominantly purple graphical effects. Interestingly enough, antidotes are also represented by a bottle filled with purple liquid.
* When Kefka dumps poison into the river surrounding Doma Castle in ''VideoGame/FinalFantasyVI'', the water takes on a purplish hue.
* The poison in ''VideoGame/WheresMyWater''.
[[/folder]]

[[folder:Western Animation]]
* ScaredySquirrel: Dave's spray clouds are depicted as a large, purple cloud.
[[/folder]]

[[folder:Real Life]]
* Iodine, which is toxic, has a bright purple color in its liquid and gaseous form.
[[/folder]]

!![[color:darkgreen:Green Poison]]

[[folder:Anime and Manga]]
* [[AloofBigBrother Sesshomaru's]] poison in ''Manga/InuYasha'' tends to be yellow or greenish.
* The aptly named ''Daft Green'' trees in the tenth ''OnePiece'' movie produce green venomous spores. [[spoiler: When Nami is forcibly exposed to the spores by [[BigBad Shiki]] she starts [[http://images.wikia.com/onepiece/images/8/8b/Strong_green.png turning green]] herself.]]
[[/folder]]

[[folder:Comics]]
* SelfDemonstrating/TheJoker's Smylex toxin is usually shown as a green liquid or gas. This was common enough that it's included in ''Franchise/{{Batman}}'' films, games, and animated series that he appears in.
[[/folder]]

[[folder:Literature]]
* Averted and [[LampshadeHanging lampshaded]] in Terry Pratchett's ''Discworld/FeetOfClay'' - Vimes expects arsenic to be green and is surprised to learn otherwise.
[[/folder]]

[[folder:Live-Action TV]]
* The poison the adversary uses in the ''Series/DoctorWho'' episode "[[Recap/DoctorWhoS14E3TheDeadlyAssassin The Deadly Assassin]]" is green. Likewise the poison in "[[Recap/DoctorWhoS26E3TheCurseOfFenric The Curse of Fenric]]".
[[/folder]]

[[folder:Video Games]]
* ''VideoGame/CastlevaniaCurseOfDarkness'' features green colored poison status, and uses purple for the "cursed" status alteration. However, at least one enemy ([[LizardFolk White Gravial]]) spews a purple liquid.
* In ''Franchise/FinalFantasy'', the "Poison" and "Toxin" status itself is usually shown in the form of green bubbles/green oozing stuff.
* In ''VideoGame/FinalFantasyII'', Venom magic is bright green at low levels and dark green at high levels.
* In ''VideoGame/FinalFantasyVII'', not only are poison spells green, characters also glow green when poisoned.
* Bio spell in ''VideoGame/FinalFantasyTacticsAdvance''.
* In ''VideoGame/RuneScape'', poison is bright green. Poison damage is represented by bright green splats, poisoned weapons turn bright green at their tips, and your Life Meter changes to a bright green color when you're poisoned.
* In ''VideoGame/GemCraft'' green gems are the poisonous ones.
* In ''CrashMindOverMutant'' the "Sludge" Titan is toxic and green. Poisoned enemies turn green as well.
* In ''VideoGame/{{Minecraft}}'', being poisoned turns your health bar a sickly green, and contracting food poisoning makes your hunger bar green. During both kinds of poisoning you also have green swirls appear around you.
* Most toxins in ''VideoGame/WorldOfWarcraft'' are green.
* In ''VideoGame/{{Warcraft}} III'' the plague cloud released by some Scourge units is green and intoxicates anyone nearby. The Venom Globe is bright green and Dryads can use green poisonous spears.
* Feyrbrand the Green-Tusked Dragon from ''VideoGame/TheLegendOfDragoon'' is green and can spit a poisonous green goo from its belly. Furthermore, toxic stuff tends to be green-colored.
* Throughout the ''Franchise/{{Ultima}}'' series, the various color-coded potions do a variety of things, but the green potion is always poison, and a poisoned character's health bar turns green. Furthermore, some of the games had green swamps that would poison your character if you walked through them without special swamp boots (also green).
* In ''VideoGame/CastleCrashers'' the poison is green, and the Green Knight can use poisonous attacks.
* ''VideoGame/AgeOfMythology'' features green poisons.
* In ''VideoGame/TheLegendOfSpyro: Dawn of the Dragon'', Cynder's Poison element is green.
* In ''VideoGame/PerfectDark'', the nerve gas in Area51 is greenish in color.
* In ''VideoGame/Stinkoman20X6'', the poison dripping from "Tortan" (a bottle of poison) is bright lime-green in color.
* In one of the ''VideoGame/XMenLegends'' games, if you level up Cyclops enough, he gets an upgrade that makes his beams radioactive, doing slow continual damage for some time after it lands. Naturally, this means the beam turns green.
* In ''VideoGame/DungeonCrawl'' poisonous corpses are shown in green text.
* Later games in the ''VideoGame/{{Emergency}}'' series are notable because anything that poses a contamination risk—including chemical, biological, and radiological contaminants—can be visible as a green cloud.
* Subverted by ''VideoGame/DeusExHumanRevolution'', the pale green gas released by shooting the canisters is not poison and just knocks out anyone caught in it.
[[/folder]]

[[folder:Webcomics]]
* In ''Webcomic/TheOrderOfTheStick'', the poison [[spoiler:used by Daimyo Kubota to kill Therkla]] is green and features green bubbles from the victim. Later, the Strength-draining poison used on Vaarsuvius features green bubbles as well.
[[/folder]]

[[folder:Other]]
* A campaign called "Mr.Yuck",(or "Officer Ugg") intended to teach young children about staying away from poisonous substances,had green stickers with a Mr.Yuck face for parents to put on containers.
[[/folder]]

!!Other Colors

[[folder:Anime and Manga]]
* In ''Manga/FairyTail'', [[TheDragon Cobra's]] actual Dragon Slayer venom is dark red in color and more ''steaming'' than bubbling. Cuberios' poison too is showed to have this color, and yet his/hers victims become purple instead as seen above.
* In ''Manga/InuYasha'' during the fight against [[BattleCouple Juromaru and Kageromaru]], [[ActionGirl Sango]] uses a poison that turns the ground red in order to force Kageromaru to come out.
* ''Manga/OnePiece'' has the dreaded [=MH5=] poison gas, which releases a white cloud of deadly poison. However, it is usually changed to the usual purple mist in the video games featuring [[CombatPragmatist Don Krieg]] as a playable character. Furthermore, Magellan's [[NamesToRunAwayFromReallyFast Venom Demon: Hell's Judgement]] is crimson-colored and releases foul smokes, giving the impression of being hot somehow.
* In ''{{Toriko}}'' Coco's skin turns red in the manga when he use his poison.
[[/folder]]

[[folder:Theatre]]
* In the Mary Martin version of ''Theatre/PeterPan'', the pirates poison Pan's milk, turning it bright red. You'd think he'd notice something was up, but then it wouldn't set up Tinkerbell's heroic death.
[[/folder]]

[[folder:Video Games]]
* In the first three ''VideoGame/{{Onimusha}}'' games, there are some cases of yellow poisonous gases, especially in the second game.
* In ''VideoGame/WorldOfWarcraft'', the Rogue can put poison on his weapons. There are many kinds of venom, including green as well as red and black.
* ''VideoGame/TheLegendOfDragoon'': Feyrbrand can also produce and shot blue poison (causes Fear) and grey poison (causes Stun).
* In ''VideoGame/CommandAndConquerGenerals'' and the ExpansionPack, GLA anthrax is green, Anthrax beta is blue and Anthrax gamma is purple. Radiation meanwhile is orange.
* The Elder Scrolls Series utilizes color-coded poisons, each corresponding to the color that represents a vitality bar: red for health poison, blue for magicka poison, and green for stamina poison. It helps in skyrim that the bottles for poison are oddly shaped, while the restoratives are 'potion-shaped'.
[[/folder]]

[[folder:Western Animation]]
* The many types of gases used by the vile borg, Noxious in ''WesternAnimation/SkysurferStrikeForce'' also come in many bright colors.
[[/folder]]

[[folder:Real Life]]
* In nature, bright colors are often a color code for things that are venomous (see many species of amphibians with venom). Bright blue in particular is an appetite suppressor, as no foods humans consume are naturally that shade (blueberries are coloured indigo) — and things that are blue are usually venomous. Dietitians will advise people wishing to lose weight to eat on blue plates, for example. Purple, being close to blue in the spectrum, shares some of blue's appetite-averting effects.
** Subverted ([[SarcasmMode when does nature ''ever'' subvert a trope?]]) with the Destroying Angel mushroom, one of the most lethal of all [[PoisonMushroom poisonous mushrooms]], which is pure, snow white.
* Chlorine gas is a particularly noxious respiratory irritant that just so happens to be yellowish green in color.
[[/folder]]

----