Indigo is a color between blue and violet.

Indigo or INDIGO may also refer to:

• IndiGo, a low-cost airline based in India
• Indigo Airlines, an American airline
• Indigo (restaurant), a restaurant in Mumbai, India
• Canal Indigo, a pay-per-view TV network
• Hotel Indigo, a hotel chain
• Indigo Agriculture, a startup company that uses plant microbiomes to strengthen crops
• INDIGO Beijing, a shopping centre in China
• Indigo Books and Music (stylised !ndigo), a Canadian bookstore chain
• Indigo Film, an Italian film production company
• Indigo Internet, an internet service provider
• Indigo Park Services UK Limited, a parking company
• Indigo Partners, a private equity firm

• Indigo (film), a 2003 film by Stephen Simon
• Indigo, a character in Rainbow Brite and the Star Stealer

• Indigo (Hoffman novel), a 2002 novel by Alice Hoffman
• Indigo (Warner novel), a 1992 novel by Marina Warner
• Indigo (comics), a DC Comics character
• Indigo Digital Press, a series of printing presses
• Indigo Publications, publishes websites and newsletters
• Indigo, a novel by Graham Joyce
• Indigo, series of fantasy novels by Louise Cooper
• Indigo, an imprint of Orion Publishing Group catering for the teen market

• The Indigo, a Japanese band

• Indigo (Matt Bianco album), 1988
• Indigo (Chris Brown album), 2019
• Indigo (Diego Gonzalez album), 2008
• Indigo (Maja Keuc album), 2011
• Indigo (Never Shout Never album), 2012
• Indigo (RM album), 2022
• Indigo (Wild Nothing album), 2018
• Indigo: Women of Song, a 2004 album by Olivia Newton-John
• Indigo, a 1991 album by Patrick O'Hearn
• Indigo, a 2018 album by Kandace Springs

• "Indigo" (Justhis, Kid Milli, Noel, and Yang Hong-won song), 2018
• Indigo (Chris Brown song), 2019
• "Indigo", a 2007 song by Epica from The Divine Conspiracy
• "Indigo", a 1978 song by Peter Gabriel from Peter Gabriel
• "Indigo", a 2016 song by Invent Animate from Stillworld
• "Indigo", a 2000 song by Moloko from Things to Make and Do
• "Indigo", a 2023 song by Of Mice & Men from Tether
• "Indigo", a song by Niki from Head in the Clouds II
• Indigo, a 2016 opera by Eicca Toppinen and Perttu Kivilaakso

• Indigo bush
• Indigo dye, an organic compound with a distinctive blue color
  • Indigofera, a genus of flowering plants used to produce indigo dye
    • Indigofera tinctoria, the species most often used in production of indigo dye
• Indigo snake Drymarchon, a genus of large nonvenomous snakes
• Wild indigo, a herbaceous perennial plant
• Indigo bunting, a small seed-eating bird in the cardinal family

• Indigo Valley, Victoria, Australia
• Shire of Indigo, Victoria, Australia
• Indigo Lake, Alaska
• Indigo Tunnel, an abandoned railroad tunnel in Maryland
• Indigo Lake, Ohio

• Indigo 91.9 FM, an Indian radio station
• Indigo FM (Australia), an Australian radio station
• Indigo FM, a radio station broadcasting to the South Lakes and North Lancashire area in the United Kingdom

• Indigo (messaging system), part of the Windows .NET software framework
• Indigo (virtual assistant), an intelligent personal assistant for mobile devices
• Indian Initiative in Gravitational-wave Observations (INDIGO), a proposed gravitational wave detector
• Project Indigo, Indian/Swiss attempt to develop an intermediate-range surface-to-air missile
• SGI Indigo, a line of workstation computers
• Indigo, a postpaid cellular service by Mobilink in Pakistan
• Indigo, a release of Eclipse

• IndiGo, a low-cost Indian airline
• Indigo Airlines (American airline), a defunct airline
• Ford Indigo, a concept car by Ford Motor Company
• Indigo 3000, a Swedish roadster
• Tata Indigo, an Indian compact car

• Indigo (actress) (born 1984), American television and voice actress
• Indigo (board game)
• Indiana County Transit Authority (IndiGO)
• Indigo children, a New Age concept, children who are believed to possess special traits or abilities
• Indigo Era, an economics theory
• Indigo (given name), the given name

• Captain Indigo, a character in the television series Captain Scarlet and the Mysterons
• Indiggo, a Romanian-American singing duo
• Indigo carmine, a pH indicator and food colorant
• Indigo Girls, American folk rock band
• Indigo Lake (disambiguation)
• Indigo revolt, a Bengali peasant movement
• Indigo Tribe, a fictional organization in DC Comics
• Indigo Walker, a character in the television series Home and Away
• Endigo, Swedish-Japanese drag queen
• All pages with titles containing Indigo
• All pages with titles beginning with Indigo