Indigo - Mrs. Jenny Matlock's Alphabe-Thursday - Rainbow Summer School - Rainbow Indigo

Photo Copyright Christina Wigren

Today is Thursday and time to link with Mrs. Jenny Matlock's Alphabe-Thursday Rainbow Summer School. This week's colour is RAINBOW INDIGO. I have a problem with Indigo because I don't think that it is the right colour to be placed between blue and violet/purple. I agree with Prof. O. N. Rood, who writes in the article below that ultramarine would be a better choice for a blue on its way to being violet.

My first photo is a close up of a cat collar that is nylon and has a bright ultramarine blue hue. Then I would like to show some beads that are different hues: violet, purple, ultramarine, indigo and blue:

Here are some of my collection of blue-ultramarine-violet glass beads

Photo Copyright Christina Wigren

The following text is retrived from Wikipedia

Newton denoted by the name of "indigo" the tint of the spectrum lying between "blue" and "violet." Von Bezold, in his work on color, rejects the term, justifying his objection by observing that the pigment indigo is a much darker hue than the spectrum tint. Prof. O. N. Rood, who follows Von Bezold in rejecting the term, brings forward the further objection that the tint of the pigment indigo more nearly corresponds in hue (though it is darker) with the cyan-blue region lying between green and blue. By comparing the tints of indigo pigment, both dry and wet, with the spectrum, and by means of Maxwell’s disks, it appears that the hue of indigo is almost identical with that of Prussian blue, and certainly does not lie on the violet side of "blue." Indigo in the dry lump, if scraped, has, however, a more violet tint; but if fractured or powdered, or dissolved, its tint is distinctly greenish. Prof. Rood considers that artificial ultramarine corresponds much more nearly to the true tint of the spectrum at the point usually termed "indigo," and he therefore proposes to substitute the term "ultramarine" in its place, the color of the artificial pigment being thereby intended.

Photo Copyright Christina Wigren

Photo Copyright Christina Wigren

Photo Copyright Christina Wigren

Photo Copyright Christina Wigren

By popular demand, Lovisa the cat, has returned to help us figure out
which colour is best for this spot, indigo or ultramarine.

Thanks for visiting!
Best wishes,
Anna

First Commenter:
Rocky Mountain Woman


To visit other posts about the colour indigo, please go to Mrs. Jenny Matlock's site Off My Tangent for 'Alphabe-Thursday's Rainbow Summer School' - Rainbow Indigo.