In the real world, things which serve the same purpose tend to have similar form factors: different brands of car do look different, but they're all recognizably automotive. Different models and brand of tank, plane, or gun all look different, but are still similar enough that someone not well-versed in the particulars would still be able to identify them at first glance.

Not so in ScienceFiction: If two different races have similar technology, it must look radically different, even in the visual effects they use. One might think that EnergyWeapons based on the same physical principles would give off a visual effect characteristic of that principle, so any weapon that works in the same way would look the same -- not so. In fact, each weapon will reflect the race of its builder. This might seem doubly strange as the aliens themselves tend to all look [[RubberForeheadAliens exactly like humans with a funny nose glued on]]. The realm of SpecialEffects is the one place where show designers seem to remember that the product of alien development should look really radically different from Earth development -- even though it's an area where one would expect form to follow function. Two species will not use the same special effects for the same technology, unless a point is being made that they are trading science (and not always then). Perhaps there's an intergalactic trademark office which registers the colors of laser beams. Lasers, incidentally, can be made any color but because the different wavelengths behave differently colors would probably end up distributed by the task the weapon was designed for rather than by species.

Note that this specialization is a comparatively recent phenomenon: In bygone days when budgets were lower, effects were harder and audiences cared less, everyone used the same film-negative effect for lasers, and the same V-2 spaceship design.

Specific form of ColorCodedForYourConvenience.

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!!Examples:

[[foldercontrol]]

[[folder:{{Anime}} and {{Manga}}]]
* In [[Anime/FullmetalAlchemist the 2003 anime adaptation]] of ''Manga/FullmetalAlchemist'', the Transmutation circles vary depending on what's being transmuted, whether the alchemist has seen the Gate, and other factors.
** Justified; different circles are designed to do different things.
** In ''[[Manga/FullmetalAlchemist Fullmetal Alchemist: Brotherhood]]'', the sparks from alchemy use are normally blue, but when homunculi regenerate or someone uses a Philosopher's Stone, they're red. [[spoiler:Possibly to denote the consumption of human soul energy in the transmutation.]]
[[/folder]]

[[folder:{{Film}}]]
* ''Film/StarWars'':
** Red lightsabers are Evil, Blue and Green are Good. Purple ones are apparently reserved for [[Creator/SamuelLJackson bad motherfuckers]].
*** Averted in at least one ExpandedUniverse story, in which Leia's lightsaber is red. Corran Horn also manages to create a lightsaber that can do two different colours depending whether it's set to its regular length or an AwesomeButImpractical setting that turns it into a {{BFS}}.
** A separate example is the colour of blaster and turbolaser weapons. In the original trilogy, this trope was used in the ''space'' battle scenes (where the Empire used green and the Rebels used red, an interesting reverse of the usual lightsabre colour branding) but was not used in ground fights, where all bolts were red. The prequel trilogy on the other hand used it for ground battles as well, the Naboo using green, the Trade Federation using red and the Republic using blue (confusing some ExpandedUniverse fans who were used to the games [[ColourCodedForYourConvenience colouring ion-cannon fire blue]].
*** A further example is in the Geonosis battle at the end of ''Film/AttackOfTheClones'' with the rockets: good rockets leave white trails of smoke while evil rockets leave black ones.
* In the ''Film/HarryPotter'' films, Death Eaters and Order members have different Apparating effects for no reason. Death Eaters turn into menacing clouds of smoke while Order members turn into blazes of white light. It looks [[RuleOfCool rather cool]], though.
** A more justified example in that the ([[AmbitionIsEvil Slytherin to a man]]) villains tend to use a lot of green Avada Kedavra spells, while the (almost entirely Gryffindor) heroes stick to red Expelliarmus and Stupefy spells.
* ''Film/StarTrek'': Phasers have red and blue emitters for Kill and Stun settings, respectively.
[[/folder]]

[[folder:Live Action TV]]
* ''Series/DoctorWho'': Whatever may have happened in the old days, "The Christmas Invasion" raised some loud arguments in fandom because the Sycorax and "Pilotfish" used the same visual effect for their teleports. The plot thickened somewhat when the "pilotfish" returned for "The Runaway Bride" and were revealed to have nothing whatever to do with the Sycorax.
** Also, there was a spoiler for ''Doomsday'' in the trailer for ''Army of Ghosts'': a brief clip of action from the second episode was inserted instead, and it contained [[spoiler: the distinctive Dalek gun effect and sound, revealing the shock appearance of the Daleks at the end of ''Army of Ghosts'']].
* ''Franchise/StarTrek'':
** This trope is avoided in most cases: for instance, both Klingon and Romulan ship-mounted disruptors use green effects, and both Cardassian and Federation phasers are the same yellow/orange color. (despite their similarities, "phasers and "disruptors" are different technology) However, transporters generally follow this trope, having similar but distinct special effects: blue transporters for Star Fleet, red transporters for Klingons, green transporters for Romulans, and so forth. ''Series/StarTrekDeepSpaceNine'' made a special point of this, as the titular station, though operated by Star Fleet, was of Cardassian origin and used Cardassian transporter effects.
* ''Series/StargateSG1'' gives each major player their own radically different ship design and weapon effects, ranging from Egyptian pyramids to Earth naval ships to bioships, though there is an exception: the minor races all use the same (Goa'uld) design of ship, having acquired them second hand. That said, the technology of both humans and aliens in the Pegasus Galaxy of ''Series/StargateAtlantis'' looks quite different. Even the gates are of a different design. And despite their obvious usefulness, the Atlantis team does not appear to have brought any Zat guns or staff weapons with them, nor have they sent any Wraith stunners or (with one temporary exception) puddle jumpers back home.
* ''Series/BabylonFive'':
** Ships from every power look far different from each other, and even their propulsion systems and weapons are different, making the species owning them readily identifiable once they're introduced.
* Both used and subverted throughout ''Series/{{Firefly}}'' and ''Film/{{Serenity}}''. The Alliance and civilian vessels (particularly ''Serenity'') have ''very'' distinctive differences from each other. However, while definitely "branded" with their SpikesOfVillainy, painted blood, and corpses, the Reaver ships are still recognizable by class - one shot from ''Serenity'''s fleet battle shows an Alliance frigate and a Reaverized counterpart of the same ship in great detail.
[[/folder]]

[[folder:Tabletop Games]]
* Averted in ''TabletopGame/Space1889''. Martian things resemble human objects with a similar purpose. They can be a little bit more showy, though.
[[/folder]]

[[folder:Video Games]]
* In the ''[[VideoGame/FreeSpace Descent: Freespace]]'' series, apart from the fact they all use engines, lasers and subspace drives, It's hard to tell that Terran, Vasudan and Shivan ships are even from the same universe. The factions' laser cannons all have distinct colors. The [=MediaVPs=] take this further with the shields being different colors.
** Terran vessels are [[ISOStandardHumanSpaceship boxy, grey and decidedly 'military']] in aspect to reflect their 'utilitarian' attitude. In ''VideoGame/FreeSpace2'' they become more streamlined due to tech-sharing and Vasudan influence, although this process [[PunyEarthlings doesn't seem to work in reverse]].
*** The early Vasudan ships, especially freighters such as the ''Bast'' and ''Ma'at'' classes, are as clunky and boxy as their Terran equivalents, but they seem to have crossed the starship BishonenLine much faster than the Terrans. Even the [[StarfishAliens Shivans]] are going this way, from the harsh, severe, jagged asymmetrical contraptions of the first game to the insectile designs of the second.
** Vasudan ships look vaguely like alien creatures, particularly beetles. According to the [[AllThereInTheManual Tech Room]], they are based off creatures that live [[spoiler:or used to live]] on the planet Vasuda, supposedly because [[ScaryDogmaticAliens of their highly philosophical culture]].
** The Shivans... well their ships are [[GoodColorsEvilColors painted black, red and silver and fire off red lasers]]. They also have the tendency to have [[SpikesOfVillainy random spikes]] sticking out, and be asymmetrical with an off-center engine. God knows how Shivans manage to balance their ships. Maybe that's why the captured Terran-modified asymmetric [[GoddamnedBats Dragon]] in [=FS1=] was crippled, while the captured (symmetrical) Mara you flew in [=FS2=] was awesome. But I digress. This, of course, shows that the Shivans are just plain weird (and evil).
*** [[SpaceIsAnOcean Space is not an ocean]]. They wouldn't need to have their ships balanced; the engine placement has no effect, aside from pointing where the craft is going.
*** Incorrect. An off-center engine would impart rotational force on the ship whether on water or in space--in fact, this is the principle behind the maneuvering system of any practical spacecraft--numerous small thrusters distributed at specific points on the craft to turn it on any axis desired. A Nephilim-class bomber ought to spin like a top with its main thruster off to one side.
* Used in ''EveOnline''. The Amarr have sleek, symmetrical, shiny golden ships with beam weapons. The Gallente have smooth-shaped, almost organic-looking green ships with {{Attack Drone}}s and blasters. The Caldari have utilitarian, gunmetal grey/blue, angular ships with railguns and missiles. The Minmatar have rust-brown/red heaps'o'junk which fly at unsafe speeds and the larger ships fire car-sized artillery shells. Some of the minor factions also have their own designs. Angel Cartel fly ships that resemble the Shivans mentioned above, the Sansha ships look like they have been designed by a sadomasochist, the rogue drones are basically mechanical insects and the Jove fly Gigeresque biomechanical ships.
* In ''SinsOfASolarEmpire'', the three sides have different ship designs and different weapons. Even weapons that are supposed to be similar between the sides have different effects. Most of the TEC ships are hastily-converted cargo haulers and passenger liners, and it shows. The ''Kol''-class battleships are the only ones that were designed specifically for war, but their appearance is decidedly utilitarian. They primarily use pulsed lasers and kinetic weapons. The ''Kol'' is equipped with powerful red laser beams. The [[ScaryDogmaticAliens Advent]] are [[NinjaPirateZombieRobot psychic cyborg humans]] whose ships feature sleek, gleaming designs. Their staple weapons are bright blue beams that look nothing like the TEC lasers. The Vasari, being nonhuman, feature vastly different designs, although not different enough not to be recognizable. They're still sleek, but ''alien'' sleek. Their weapons are mostly of the green plasma variety.
* ''VideoGame/StarControlII'' has a wide range of StarfishAliens and RubberForeheadAliens, with ships designed to meet their physiological needs as well as using their unique weapons systems. While you may control ships designed by a specific race, you must also have pilots of that race to control them.
* ''VideoGame/SwordOfTheStars'' averts this trope in that all factions have similar effects for their weapons, and weapons effects in fact represent the technology level and type of the weapon - green lasers for example, used by anyone, are stronger than red lasers used by anyone. While each faction's ''ships'' do, however, look drastically different from the other factions' ships, the game does provide varying degrees of [[AllThereInTheManual technological or cultural justification]] for this, including the fact that each faction has a different stardrive from the others around which they base their ships.
* ''VideoGame/ChampionsOnline'' uses this trope where it can - the ships of the alien enemy Qulaar are insectile and highly organic, while the ships of the froglike Gadroon are sleek, shiny, have no visible engine or thruster, and apparantly BiggerOnTheInside - a cruiser large enough for a full terraforming force with dozens of Gadroon is barely half again larger than an F-22. On the other hand, player characters have a huge variety of armor, weapon, and even jetpack styles to choose from, and many will mix and match.
* Zigzagged in ''VideoGame/DawnOfWar'': While most races have unique projectiles (the Tau have blue plasma, the Necrons have green lightning), the Imperial Guard and Sororitas have very similar building animations while the ork Flash Gits use the same projectile as Ogryn Rippers, but then it's possible their snazzguns were Rippers before falling in the hands of the local mekboy.
* Appears in a very specific variation in ''VideoGame/MechWarrior 4'', which features technology from both the Inner Sphere and the invading Clans. Inner Sphere lasers fire red energy beams, but in spite of using identical technology (albeit extended to longer ranges), Clan laser beams are bright green. This makes it very easy to tell what kind of loadout an opponent is using based on what color of laser you see flashing past your cockpit viewscreen. This extends into their [[BeamSpam pulse laser]] technology, where you can also find red Inner Sphere-origin pulse lasers, green Clan-made ones, and Inner Sphere-built experimental blue 'X-pulse' weapons. The advent of the Mektek Mekpaks includes the amber-orange Clan-designed heavy laser to the mix. This breaks down to the primary colors, red and blue, being Inner Sphere technology, while the secondary colors, green and orange, denote Clan technology. Averted in the other games, in which comparable Clan and Inner Sphere weaponry are visually identical, as both use red-green-blue lasers, with blue being the most powerful.
* In the ''Franchise/MassEffect'' series, standard biotics (PsychicPowers) are blue for every species except Protheans, who are green. Prothean holograms are also green instead of the blue or orange that other species use.
* ''VideoGame/CrashBash'': In many of the minigames, each type of character would use things themed to them. For example, in the minigame Pogo Pandemonium, Crash and Coco use actual pogos, Dingodile and Rilla Roo use... some kind of modified pogo that shoots flames, Tiny and Koala Kong use spring coils attached to their legs, and Neo Cortex and N. Brio use JumpJetpack.
* Ships and weapons in the ''[[VideoGame/{{X}} X-Universe]]'' follow this. Every faction that builds ships does it differently. For example, Teladi love ballistic weapons and have yellow, junkyard-esque ships,while [[HumansAreSpecial Terrans]] fire brilliant white electromagnetic plasma bolts from their [[ShinyLookingSpaceShips blindingly white ships]]. Each race has their own set of ships, and as of ''Terran Conflict'', their own unique weapon set, which typically only usable by their own ships and their allies - [[HumansByAnyOtherName Argon]] and [[FishPeople Boron]], [[ScaryDogmaticAliens Paranid]] and [[ProudWarriorRace Split]]. [[ProudMerchantRace Teladi]] buy their stuff from everyone, so they can mount schizophrenic loadouts. [[PlanetTerra Terrans]] are independent, and cannot use any non-Terran weapons in their ships. However, there are generic weapons that can be used by any race, such as plasma throwers or [[WaveMotionGun photon pulse cannons]].
** Argon fighters look vaguely like diesel punk fighter jets ([[http://eng.x3tc.ru/screenshot/ship.php?MzM1MjI3NQ M3 Nova]]), while the capital ships are gray and boxy ([[http://eng.x3tc.ru/screenshot/ship.php?MjgwMzIwMw M1 Colossus]]).
** Boron ships are bright green and organic-looking, resembling fanciful sea creatures ([[http://eng.x3tc.ru/screenshot/ship.php?MzY1NzExMzE M7 Thresher]]).
** Paranid ships are grayish purple with lots of sweeping curves ([[http://eng.x3tc.ru/screenshot/ship.php?MjI4NDQzMzE M1 Zeus]]).
** Split ships are rusty red with lots of sharp edges and flat panels ([[http://eng.x3tc.ru/screenshot/ship.php?ODEzMjA0OTk M7 Panther]]).
** Teladi fighters are basically bluish slabs of metal with stubby wings ([[http://eng.x3tc.ru/screenshot/ship.php?NDA5NjM3MDc M3 Falcon Hauler]]), while the capitals are frequently likened to [[UsedFuture "flying junkyards"]] ([[http://eng.x3tc.ru/screenshot/ship.php?NDAxNDAwOTk M1 Condor]]).
** Terran fighters resemble space shuttles ([[http://eng.x3tc.ru/screenshot/ship.php?NTk2MzIxNTU M3+ Cutlass]]), while the capital ships are big, white, boxy contraptions ([[http://eng.x3tc.ru/screenshot/ship.php?NTkwODMwODM M2 Osaka]]).
** ATF ships tend to be spiky and angular, with lots of silvery gray ([[http://eng.x3tc.ru/screenshot/ship.php?NTQ5NjUwNDM M1 Odin]]).
** Kha'ak fighters are purple and pyramid-shaped ([[http://eng.x3tc.ru/screenshot/ship.php?NjcwNDQ2Mjc M4 Interceptor]]), while the capitals resemble giant insects ([[http://eng.x3tc.ru/screenshot/ship.php?NjYyMjEwMTk M1 Carrier]]).
** Xenon ships are gray and boxy with SpikesOfVillainy ([[http://eng.x3tc.ru/screenshot/ship.php?NDY0NTQ0Mjc M2 K]]).
[[/folder]]

[[folder:Web Comics]]
* ''Webcomic/WellThatWasUnexpected'': Most types of energy weapons and spellcasting in the comic have their own unique visual and sound effects. However, one aversion shows up with the Tau and Eternus energy weaponry, which share a bright blue appearance and distinctive "FREEN" (or sometimes "BREEN") sound effect despite being from entirely unrelated sources.
[[/folder]]

[[folder:Western Animation]]
* Taken to an extreme in most ''Franchise/{{Transformers}}'' series, where everybody's weapons are theirs and theirs alone. This is a combination of the MerchandiseDriven idea of making sure everyone uses the weapon they come with and launches the appropriate missiles, and the fact that, as TransformingMecha, their weapons are more or less part of them. This doesn't explain why ships tend to have similar variety, though.
** Averted in one of the G1 animated episodes. The Decepticons have captured the Autobots with the exception of Wheeljack. Wheeljack manages to infiltrate their holding cell, discovers his buddies are tied up, depowered, soaking wet (bad thing for robots), and with their carbine-shaped weapons piled sloppily in the corner. He then proceeds to go GunsAkimbo--pointing AT THE AUTOBOTS. "My friend's weapons! Hmm. Okay, Sideswipe's flare gun should dry off your circuits, and Bluestreak's bolts should give you all an instant recharge!" It's amazing the first thing Optimus didn't do was FacePalm: "It's a wonder the Decepticons didn't just kill us outright, but vector sigma, am I the only one that knows that guns are supposed to be for killing?"
** Additionally, in some continuities, each faction has different colored beams from their energy weapons. The different factions also generally have different coloured eyes (blue for Autobots, red for Decepticons) although their optical sensors presumably all function the same way.
** ''WesternAnimation/BeastWars'' averts this. While all the characters ''do'' have their own signature weapons, the Maximals have a separate armory, supposedly for gunless characters like Dinobot.
[[/folder]]
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