The Neathbow
"A book for children. One page is devoted to each of the colours of the Neath, which are not found on the Surface."THE NEATHBOW, Sunless Sea

The Neathbow is the conjectural term for seven colors which cannot be seen on the Surface. They're most commonly observed in the Neath (hence the name), but they may also turn up in places like ParabolaParabola tattoo, Fallen London and the High Wilderness.The Stair to the Sea, Sunless Skies
Irrigo
"I is for IRRIGO. No one remembers why. Irrigo colours the forgotten corners of home."A Page from 'The Neathbow': Irrigo, Sunless Sea

The most prominent color of the Neathbow, irrigo is the unremembered color, the light of absence.Irrigo, Fallen London Exposure to it causes severe memory-loss, overexposure to it can result in total ego death, and it can cause thick, bony plates to grow over one's eyes, creating disgusting eyeless skulls.Struggle for the exit, Fallen London The Cave of the Nadir is filled with dangerous irrigo radiation,The Catafalquerie, Fallen London so explorers use tea brewed from Ray-Drenched Cinders to protect themselves.Enter the Cave of the Nadir, Fallen London
Irrigo can be infused into objects,Pair of Irrigo Goggles, Fallen London and Midnighters use shrines and robes that are draped in this color to perform their rites.Shrine to Saint Joshua, Fallen London Strangely, irrigo seems to internally retain the memories it steals, so Fluke-Cores often have years worth of histories and experiences stored within them.Fluke-Core, Fallen London
Irrigo's name comes from the Latin irrigo, meaning to flood or overwhelm.
Midnighter.png|A Shrine to St. Joshua.
Nadirgate.png|The Gate of the Nadir
Irrigo.png|Irrigo fog. Beware.
Amberpurple.png|A Nodule of Violet Amber.
Irrigogoggles.png|A Pair of Irrigo Goggles.
Irrigosuit.png|A Strange-Shore Parabola Suit.
Irrigodress.png|A Strange-Shore Parabola Frock.
Nadircobweb.png|A cobweb in the Nadir. Charming.
Nadiraltar.png|A stone altar in the Nadir.
Amber6.png|A Fluke-Core. Mourn the mind that has passed.
Lilac.png|The Lady in Lilac
Violant
"V marks VIOLANT when blood is shed in a spired place. Violant ink is employed for the most desperate treaties..."A Page from 'The Neathbow': Violant, Sunless Sea

Violant is irrigo's counterpart; it indelibly lingers in one's memory. It's very hard to forget anything written in violant ink.A Pot of Violant Ink, Sunless Sea Correspondants use this ink extensively in their esoteric publications, which often shake up the status quo quite well.Become a Correspondent, Fallen London
The name "violant" could stem from "violent," or "violet," or both.
Correspondent.png|A Pot of Violant Ink.
violantgate.png|The Violant Gate on the Elder Continent.
Cosmogone
"C lights COSMOGONE, the colour of remembered suns. The fecund, the foetid, the fungal: these flourish in the glow of cosmogone."A Page from 'The Neathbow': Cosmogone, Sunless Sea
A shade heavily associated with Parabola, cosmogone is the color of remembered sunlight. Under its light, fungus and other flora flourishes. It's the most prominent color in a Ray-Drenched Cinder,Ray-Drenched Cinder, Sunless Sea and it's the tint of a Glassman's spectacles. Cosmogone is irresistible to the denizens of the mirrors.Set of Cosmogone Spectacles, Fallen London
The name "cosmogone" probably comes from the word "cosmogony", the study of the origin of the solar system, or of the universe.
Cosmogonespectacles.png|A Glassman's Spectacles.
Parabolarect.png|The Mirror-Marches, bathed in cosmogone light.
Peligin
"P drowns in PELIGIN, the colour of the deepest zee."A Page from 'The Neathbow': Peligin, Sunless Sea

Peligin is the hue of the waters of the Unterzee and those of the land of the dead[citation needed]; It's the color of the eyes of Monster-Hunters,Give it your Hunter's Eye, Sunless Sea as they have consumed the peligin flesh of zee-monsters.Hunter's Eye, Sunless Sea Peilign is a dark, dark, black, beyond the reach of any light.Commission a set of fine clothes, Sunless Sea
The term "peligin" likely comes from the Latin pelagus, meaning the sea.
Generic_unterzee4.png|The broad, dark Unterzee.
Hunterseye.png|A Hunter's Eye.
Apocyan
"A wakes APOCYAN, the blue of memory and brightest coral."A Page from 'The Neathbow': Apocyan, Sunless Sea

Apocyan is the color of coral, of memory,A Page from 'The Neathbow': Apocyan, Sunless Sea and of the Zee's waves.Sunless tattoo, Fallen London Chess pieces of this color are highly prized.Apocyan Chess-Piece, Sunless Sea Crooked-Crosses often lacquer their crosses in this color.A Crooked Cross, Fallen London And an apocyanic piece of amber may be what brings down the Bazaar..."I bring the Bazaar.", Fallen London "You paid dearly to get this apocyanic lump into the spire, and more dearly still to get it out, once it had absorbed the imprint you needed. "
The name "apocyan" almost certainly derives from the color cyan, which has a similar hue, and "apocalypse".
Chesspiece_apocyan.png|An Apocyan Chess-Piece, straight from Port Cecil.
crookedcross.png|A Crooked-Cross, lacquered in apocyan and blue.
Gleam.png|Blue Scintillack. It blazes with apocyanic radiance.
Viric
"Behind your mirror, V names VIRIC, the colour of shallow sleep."A Page from 'The Neathbow': Viric, Sunless Sea

Viric is the green of shallow sleep. It's heavily associated with the FingerkingsGive it your enigmatic painting, Sunless Sea - Fingerking-possessed Clay Men'sAllow the Mechanic to enjoy his sleep, Sunless Sea (and the Somnolent Hyena's)Gawp, Fallen London eyes burn with viric fire, and a box of dream-snakes will also glow viric.A Mirrorcatch Box Full of Very Angry Dream-Snakes, Sunless Sea The priests of Varchas use viric Mirror-Charms to ward off Fingerkings from their mirrored city.Dreams of Smoke, Sunless Sea
When viric light comes into contact with vegetation, it causes it to flourish and grow at an exponential rate.[1]
The word "viric" probably comes from the Latin vivo, "alive".
Jungle.png|"A Phantasmal Encounter, 189-, Captain ------"
Boxdreamsnakes.png|A Mirrorcatch Box Full of Very Angry Dream-Snakes.
Hyena.png|The Somnolent Hyaena.
Gant
"G is lost in GANT, which remains when all other colours are eaten. Gant can be found where shadows are myriad."A Page from 'The Neathbow': Gant, Sunless Sea

The color one sees in the dark, gant is more beige than one might expect.A List of Aliases, Writ in Gant, Fallen London It is the color of the Eater of Names' boat,Show it a sketch of the Figurehead of the Eater of Names, Sunless Sea and zee-beasts go to a place called the Gant Pole to die.Gant Pole, Sunless Sea Perhaps most notoriously, it is also the color of the Avid Horizon's gate.Avid Horizon, Sunless Sea Gant ink is used to remove false tattoos;Offer to sponsor the ganting of the tattoo (5 FATE), Fallen London it's also an invisible ink, meant for writing Licentiates' aliases.A List of Aliases, Writ in Gant, Fallen London Licentiate.png|A Licentiate's aliases, written in gant ink. eaterofnames.png|The Eater of Names's gant bow. Gantpole2.png|The Gant Pole Eggblack.png|A shell from the core of Frostfound. Horizon Skies.png|The Avid Horizon's High Gate.
Fireworks
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Fireworks featuring the Neathbow are occasionally lit during the Feast of the Exceptional Rose to celebrate the occasion.Arrange a Explosion of Neath-Colours on the Stroke of Midnight (40 FATE), Fallen London
- Irrigo fireworks can help dull memories of hard times.
- Violant fireworks are hard to forget.
- Viric fireworks induce lassitude - sweet dreams!
- Gant fireworks show depth of feeling - grandiose but a bit arrogant.