There's No Such Thing as Indigo

Isaac Asimov once said
"It is customary to list indigo as a color lying between blue and violet
But it has never seemed to me that indigo
Is worth the dignity of being considered a separate color
To my eyes it seems merely deep blue"

And I agree with that
I've never understood Indigo
It's almost never even depicted the same way
Sometimes it is, as Asimov said, a deep blue
Sometimes it's shown as a full-on purple
Sometimes it's very much in what I consider pink's jurisdiction
What the hell?

And talking of purple
What's the deal with purple and violet?
My brain organizes colors based on Crayola's designations
And so purple and violet are synonyms to me
And they probably are to you too
Now, I know that in Color Theory violet is the color next to blue
That helps make up white light
And purple is a mix of any shade of red or violet and white
Meaning that no pure light source can produce purple

Purple is impure
Purple is vague
Purple exists outside the spectrum
Purple is a category of colors
Purple is magenta and pink and fuchsia
And all sorts of other colors
That Crayola clearly has names for
Violet is a color
Purple is an abstract and esoteric concept

But what of Indigo?
Indigo is bullshit

Indigo was made up by Sir Isaac Newton
When he prism'd white light into its component bits
And discovered the spectrum of colors of which visible light is composed
For reasons that are not entirely clear to me
Newton wanted there to be 7 colors to match
The 7 musical notes of the major scale
And the 7 planets of which humans were, at that time, aware
And, perhaps most weirdly
The 7 days of the week
He really needed them all to match up

Colors, music and planets I can dig
As they are all great big elements
Of the natural world
But the days of the week are
An arbitrary man-made construct
Like Indigo
For, you see, Newton invented Indigo
Forcing this nonsensical, nonexistent
Wedge between blue and violet
For his own weird, aesthetic, quasi-religious purposes

Plus, Crayola didn't even HAVE an Indigo crayon until the year 2000
Some 340 years after Newton crammed it into our rainbow
Ensuring that children would be forever bewildered
By this mythological half-blue, half-purple crypto-color
So, you know, there's that