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Why Is Indigo In The Rainbow?
SciShow

SciShow

Published on 5 years ago



Indigo may be a very vague and unnecessary color, but it has an interesting history that involves some plants, turmoil, and Isaac Newton's interest in the number seven.

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Sources:
http://www.npr.org/2011/11/07/142094103/indigo-the-indelible-color-that-ruled-the-world
http://www.theatlantic.com/video/index/283432/why-roygbiv-is-arbitrary/
http://www.popsci.com/blog-network/techtiles/problem-indigo
http://www1.umn.edu/ships/updates/newton1.htm
http://www.npr.org/books/titles/142094203/indigo-in-search-of-the-color-that-seduced-the-world#excerpt
http://www.nytimes.com/2015/11/06/fashion/mens-style/levis-denim-lab-san-francisco.html
http://www.nytimes.com/2014/08/07/garden/reviving-a-dyeing-technique.html
http://www.wildcolours.co.uk/html/indigo_history.html
http://news.nationalpost.com/news/why-the-colour-indigo-is-disappearing-from-sir-isaac-newtons-occult-rainbow
http://health.howstuffworks.com/mental-health/human-nature/perception/eye3.htm
http://science.howstuffworks.com/colors-in-visible-light-spectrum.htm
https://books.google.com/books?id=PbsoAXWbnr4C&pg=PA193&dq=Newton+color+Indigo&hl=en&ei=kw3QTemzJsea8QOC_anbDQ&sa=X&oi=book_result&ct=result&resnum=7&ved=0CH0Q6AEwBg#v=onepage&q=Newton%20color%20Indigo&f=false

Image Sources:
https://commons.wikimedia.org/wiki/File:Indigofera_tinctoria1.jpg
https://commons.wikimedia.org/wiki/File:COLLECTIE_TROPENMUSEUM_Indigo_wordt_aangemaakt_in_kuilen_in_uitgehakte_puimsteentufgrond_Karolanden_TMnr_10014190.jpg
https://commons.wikimedia.org/wiki/File:Indigo_cake.jpg
https://commons.wikimedia.org/wiki/File:Indigo_plant_extract_sample.jpg
https://commons.wikimedia.org/wiki/File:Indo-Roman_trade.jpg
https://commons.wikimedia.org/wiki/File:Indigoproduktion_BASF_1890.JPG
https://commons.wikimedia.org/wiki/File:GodfreyKneller-IsaacNewton-1689.jpg
https://commons.wikimedia.org/wiki/File:NewtonDualPrismExperiment.jpg
https://commons.wikimedia.org/wiki/File:Newton%27s_colour_circle.png
https://en.wikipedia.org/wiki/File:S_Club_7_-_Bournemouth_2015.jpg


Comments :

Sagar Thorat

Sagar Thorat . 2 weeks ago

Indigo is Royal Blue. Its a type of Blue.

Misterious Gamr

Misterious Gamr . 3 weeks ago

Us, sitting on our dinner table having our Ube desserts in the Philippines...wait

Layla Prosser

Layla Prosser . 4 weeks ago

My name is indiigo

KandaPanda

KandaPanda . 1 month ago

"purple-y-blue" .....like orange 🍊 🟧 the color and the fruit. it's really a "reddish-yellow" or "yellowish-red". .....next time you think "is indgo a color?", go to a paint shop, as for "white paint. white, white" and note their annoyance. of course, nearly everything is a spectrum. Taupe, Kakhi, Tan, Beige.....do they not exist because "reasons"? I used to mix paint for a living....when you bring your favorite teddy bear into your friendly neighborhood paint store and ask for a gallon of "this teddy bear 🧸 brown", we are taught [big paint chains to warehouse style hardware stores] to convince you that our color matching machine will match anything. ...think about how that would work: Fabric is made of many different colors and it differs from one area to the next. it's like trying to use a machine to match the colors on a CRT TV.....you would end up with various versions of RGB combinations depending on where you took your scan from. it's not a human eye, so it breaks down the image in pixels and gives you the average. if you take the same object and use the color eye 10 times, you'd get 10 very different results. so, if you really want to help the customer, you would ask them to find a color sample on the wall that was close to the color they see their teddy bear as. then note that it's close but off, and ask them "in what way? too light? too dark? too red or green?" ....from there, you take the formula you know (the sample they selected) and you walk it in until you made the color that they see in their minds. I see indigo as it's own color. blue and violet are two distinct colors and the space between is infinite .....with a clear stop at Indigo. Like red and yellow, but with a clear stop at orange.

Miss Amanda's world

Miss Amanda's world . 1 month ago

indigo is cross between blue and purple its neither blue nor purple like how magenta is neither purple nor pink

Khalid

Khalid . 5 months ago

Not sure if this is true. As far as I know that each color has a different electromagnetic wave. Therefore, there is indeed 7 different length of electromagnetic wave representing each color. Hence , there are 7 different colors. What makes more sense is the 2nd suggestion you proposed, which is what so called blue = cyan. Indigo = blue.

Stokbrood Kruimel

Stokbrood Kruimel . 5 months ago

It's weird to hear these things about my name...

Stefan the cup 36

Stefan the cup 36 . 5 months ago

Indigo deserves more... It's 1. Underrated 2. With it we can differentiate lgbtq+ and rainbow 3. It's also a name And 4/5. Because BøV sounds weird

Ворон Маусы

Ворон Маусы . 6 months ago

I might be wrong, but as far as I know, it's violet that shouldn't be part of a rainbow, as it doesn't exist. It's only an illusion, that's created by blue and red photoreceptor cones in the retina of our eyes. No?

Boilermaker Things

Boilermaker Things . 6 months ago

Indigo is my favorite color

Deborah Melo

Deborah Melo . 7 months ago

That’s the best show ever 💙

Nice

Nice . 9 months ago

Ah yes thanks youtube recommend

Kafke

Kafke . 9 months ago

Or, you know, it's a different color? I count a total of *ten* colors: Red, Orange, Yellow, Cyan (Newton's Blue), Blue (Newton's Indigo), Violet/Purple, Magenta, and then White and Black. White, Black, Orange and Violet/Purple aren't "pure" primary colors. Magenta, while being classified along with them, is physically distinct in that it doesn't associate with a wavelength of light. What weirds me out is how much cyan looks like blue, even though it is demonstrably a distinct color from blue. Likewise, it's weird that orange and purple have novel appearances, but other tertiary colors do not. And ofc white and black are the absence of color, and just gradations of brightness. Excluding white and black we've got 8 colors. Exclude the non-primaries (orange and purple) and we get 6: Red, Yellow, Green, Cyan, Blue, Magenta. OR Red, Yellow, Green, 'Blue', 'Indigo', Magenta (or 'Violet'), if you wanna call them by other names. Orange is the only one of that original 7 that can't be related to a true primary color. Violet could refer to magenta, but likely refers to the magenta-blue mix that ends up being called purple. IMO, the true name of what people usually call 'blue' is actually indigo. And "cyan" is actually blue. This makes the roygbiv groupings accurate for the light spectrum itself when observing the colors, and ofc magenta, while distinct, isn't a part of that spectrum.

γεωργια Παπαπα

γεωργια Παπαπα . 9 months ago

In Greek we have exactly the naming you mention in 3:46 Your “Indigo” is called μπλε (blue) Your “Blue” is called κυανό (cyan) or γαλάζιο

Finlay Hamm

Finlay Hamm . 9 months ago

Violet is actually modern blue that why roses are red violet are blue

Femme Sammy

Femme Sammy . 12 months ago

"Look down at your lap. Are you wearing jeans?" "Haha no." "Even if you're currently in sweatpants-" *Fear*

Im Just Emily

Im Just Emily . 1 year ago

Jokes on You, Im in SHORTS

Manilyn Esparza

Manilyn Esparza . 1 year ago

Color Rainbow Violet Indigo Blue Green Yelow Orange Red

Manilyn Esparza

Manilyn Esparza . 1 year ago

Please answer.

Manilyn Esparza

Manilyn Esparza . 1 year ago

What can be mixed to be indigo

The Overthinker

The Overthinker . 1 year ago

0:03 I will have you know sir that I am buck naked right now... so definitely not wearing jeans or sweatpants.

Sarita Jain

Sarita Jain . 1 year ago

Lekh ke bheje

J F

J F . 1 year ago

Indigo is the color of the 3rd eye chakra for us to awaken to connect to the crown chakra and go to higher consciousness.

BagelGel ツ

BagelGel ツ . 1 year ago

I was taught that the order of the rainbow is ROYGBP

Liberty Liberty Liberty Liberty

Liberty Liberty Liberty Liberty . 1 year ago

Having six colors makes way more sense than having seven colors. If you look at the color wheel there are six colors three primary colors and three secondary colors, but in the rainbow there is an extra color (indigo) which is a tertiary color so it doesn’t fit in with the other colors.

Liberty Liberty Liberty Liberty

Liberty Liberty Liberty Liberty . 1 year ago

Having six colors makes way more sense than having seven colors. If you look at the color wheel there are six colors three primary colors and three secondary colors, but in the rainbow there is an extra color (indigo) which is a tertiary color so it doesn’t fit in with the other colors.

Vishakha Sharma

Vishakha Sharma . 2 years ago

Today ,I know rainbow has not purple colour actually, the rainbow has indigo colour.

Soup

Soup . 2 years ago

Indigo is my favorite color and I think is pretty underrated for a color

Bob Rashley

Bob Rashley . 2 years ago

Richard Of York Gave Battle In Vain is the mnemonic we used at school. Yeah, I'm British.

MxseOfficial

MxseOfficial . 2 years ago

Today I found out who Roy G. Biv was...

Gerald Johnston

Gerald Johnston . 2 years ago

I like indigo 😡

3ghin5

3ghin5 . 2 years ago

I dont own any jeans, they are absolutely terrible to wear

Jay

Jay . 2 years ago

*Me before video:* _Uh, it's a colour...?_ *Me after video:* _Uh, jeans...the number 7...wet powder...crystals._

jenifer Kpundeh

jenifer Kpundeh . 2 years ago

Nice oneee

Dev Mandavi

Dev Mandavi . 2 years ago

Abe lowde ka baal kya bta rha hai

Seah BC

Seah BC . 2 years ago

Learn something everyday! I have always wondered why cyan is not included. Actually it is! Blue is cyan and indigo is blue. Thank you.

Little Mr Pinkness

Little Mr Pinkness . 2 years ago

The rainbow actually goes red, orange, yellow, green, AQUA, blue, purple, PINK. BECAUSE I SAID, THAT'S WHY. And by the way, color names get misspelled all the time online. Dre, roange, yeollw, ergen, quaa, buel, pruple, pnik, borwn, whiet, ergy, balck, but my two very favorite colors are, wait for it..... Glod and Sliver!

Antonia Faith

Antonia Faith . 2 years ago

It's weird to hear my name repeated over and over again

Lemon Bread

Lemon Bread . 2 years ago

WTF I NEVER KNEW THERE WERE 7 COLOURS OF THE RAINBOW MY WHOLE LIFE IS A LIE

Ce Sea

Ce Sea . 2 years ago

God gave us the rainbow with seven colors and now it's been used for the LGBTQ flag with six colors...I think the number isn't a coincidence lol

Rence Len

Rence Len . 2 years ago

Oh i get it indigo is dark blue i tought it was purple or vilolet

Marinella china

Marinella china . 2 years ago

wrong in ANCIENT greek indikòn means just indian (not the man) to say Indian dye you have to say in greek indiko chroma

Xerkies

Xerkies . 2 years ago

Didn’t even realize indigo was even in the rainbow

Annie

Annie . 2 years ago

This is my specific colour wheel: Red, Scarlet, Orange, Gold, Yellow, Light green, Green, Aqua, Cyan, Light Blue, Blue, Dark Blue, Navy Blue, Indigo, Dark purple, Purple, Magenta, Hot Pink, Pink, Salmon, Red

MOSEYFANJANAY

MOSEYFANJANAY . 2 years ago

Turqouis looks way better than indigo

Travis

Travis . 2 years ago

Team Breezy

jsste

jsste . 3 years ago

JUST SAY DARK BLUE

ArkhamInmateE32b

ArkhamInmateE32b . 3 years ago

2:10 I see you hedged your bets on the "was he seeing cyan and blue and calling it blue/indigo”debate. ROY G CBIV! 3:17 What that hell are those and why did Roy G. Cbiv throw up all over them??

Gary Naccarto

Gary Naccarto . 3 years ago

The funny thing is when I draw rainbows I would use pink instead of indigo because pink would stick out more.

Gary Naccarto

Gary Naccarto . 3 years ago

The LBGTQ organization usaully has three primary and three secondary Indigo does not commonly appear.



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