What is the difference between blue and indigo

Blue noun snooker One of the colour balls used in snooker, with a value of five points. Blue noun Any of the butterflies of the subfamily Polyommatinae in the family Lycaenidae, most of which have blue on their wings. Blue noun A bluefish. Blue noun An argument. Blue noun A liquid with an intense blue colour, added to a laundry wash to prevent yellowing of white clothes.

Blue noun British A type of firecracker. Blue noun archaic A pedantic woman; a bluestocking. Blue noun particle physics One of the three color charges for quarks.

Blue verb ergative To make or become blue. Blue verb To treat the surface of steel so that it is passivated chemically and becomes more resistant to rust. Blue verb To brighten by treating with blue laundry aid. Blue verb To spend money extravagantly; to blow. Blue adjective Having the color of the clear sky, or a hue resembling it, whether lighter or darker; as, the deep, blue sea; as blue as a sapphire; blue violets.

Blue adjective Pale, without redness or glare, - said of a flame; hence, of the color of burning brimstone, betokening the presence of ghosts or devils; as, the candle burns blue; the air was blue with oaths. Blue adjective Low in spirits; melancholy; as, to feel blue.

Blue adjective Suited to produce low spirits; gloomy in prospect; as, thongs looked blue. Blue adjective Severe or over strict in morals; gloom; as, blue and sour religionists; suiting one who is over strict in morals; inculcating an impracticable, severe, or gloomy mortality; as, blue laws. Blue adjective Literary; - applied to women; - an abbreviation of bluestocking. Blue noun One of the seven colors into which the rays of light divide themselves, when refracted through a glass prism; the color of the clear sky, or a color resembling that, whether lighter or darker; a pigment having such color.

Blue noun A pedantic woman; a bluestocking. Blue noun Low spirits; a fit of despondency; melancholy. Blue verb To make blue; to dye of a blue color; to make blue by heating, as metals, etc. Blue noun used to whiten laundry or hair or give it a bluish tinge. Blue noun the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic. Blue noun any of numerous small chiefly blue butterflies of the family Lycaenidae.

Blue verb turn blue. Blue Blue is one of the three primary colours of pigments in painting and traditional colour theory, as well as in the RGB colour model.

Blue Illustrations. Indigo Illustrations. Popular Comparisons. Adress vs. Comming vs. Label vs. Genius vs. Speech vs. Chief vs. Teat vs. Neice vs. Buisness vs. Beeing vs. Amature vs. Lieing vs.

Preferred vs. Omage vs. Finally vs. Attendance vs. Indigo used to be a light blue violet between blue in ultraviolet on the visible spectrum…. Now the art world has mixed black into what was a denim jean blue color, and have made it the new BLACK!

So apologies is I miss something in my response. I tend to agree that there are only six distinct colours in the spectrum, not for some political, modern or politically correct reason, but simply because when I look at the spectrum with my own eyes I only see 6 colours. As it happens I am in awe of Newton. He is one of my all-time favourite scientists. Without showing the names, but with names like: azure-blue, sky-blue, clear-blue, see-blue, lagoon-blue, dark-blue, navy-blue, indigo, etc.

Look which distinct colours the children pick or give this quest to art students with their task to undo their rainbow-colour-knowledge and look as a small kid. Maybe I can create one in the room using a prism. We see distinct colours by the way our receptors work. Most people, as you know, have three sets of cones with a specific peak frequency which determine which colours we see. The very basic sums can be seen in a television colour bar chart — usually eight bars with the addition and subtraction of all light — black and white.

This, done electronically with our subjectivity taken away. It may be that Newton describing the initial colours of the split light, named cyan as blue and blue as indigo to differentiate between the two in that part of the spectrum. We in the west seem to have a blind spot for it. Even some website explaining colour, print a spectrum without cyan which looks odd when compared with a photograph of a spectrum. Thanks for the comment. I still think you are not quite getting the point though.

Yes, the photoreceptors underpin our colour vision and each wavelength of light in the spectrum gives a unique ration of these cone responses. This allows us to distinguish one wavelength from another. At best we can distinguish differences of just 1 nm. Towards the long and short ends of the spectrum, of course, our performance falls off and we can only distinguish changes of about 5 nm.

However, that still leaves about different hues that we can see. The real question I am asking is why we see bands why do we see bands of red and yellow, for example, with quite sharp cut-offs? I mentioned my blog series on the rainbow in a previous comment. Here is the latest of three posts on my blog on the issues inherent to the rainbow. I would be curious to hear your feedback on it.

Thanks for the reply. I have to say that my knowledge of quantum catches is far less than yours! I can only make an analogy with other models. I will certainly read up on it, thanks for the information on Rushton.

Furthermore, the shape or bandwith of the response curve of each cone may determine the width of the band and the relationship with other cones. A test of this might be to pass different hues through a single coloured plate to a photoreceptor and note the output. What other hues might be seen in this single channel?

Would orange also be seen in this channel? It is probably a contrast setting that is hard-wired in our brain. I suppose it is the best way to quickly make sense of the visual input received from our eyes. If it would not be banded, then in fact it would be the same as all grey: one continuous hue. That will give you the perception of a sharp cut off. In addition, I also agree with Gerald in his October 9th post about the green-blue boundary Cyan — again!

Great example. My favorite example is the flat green band. Hence the flat band. Although the record of the wheel has aged and possibly yellowed, it is interesting to see the hue values of each colour. Some of the colours are a bit wishywashy because of the saturation, and there is a different in brightness because of the way the different programmes portray colours but I think it was worth the effort.

With the actal colors now we can try and make a palette and play with it. Thank you for sharing, this is great to be able to see the colors in Photoshop, and to replicate them. Now we can make interpolated palettes and try them on some fun test images. The author propose a 4-primary-color wheel that looks intriguing to me. His ides generated quite the controversy, so make sure you read through the commens section too. The Richard of York nemonic will never be the same!

No one has yet mentioned culturally shaped perception of color. Not just a naming difference but apparent perception difference as to when two colors are identical or obviously not identical.

Similar to the way people raised with a language can not differentiate sounds that are easily distinguishable to speakers of a different language.

Also a recent Nova or National Geographic program documenting color naming in which people in some groups easily and accurately discern five shades of green where other groups see only one.

The important question is do you actually get seven colours from three primaries? So how can it be anything but six colours of the rainbow? The color indigo represents the universe. I saac Newton first placed indigo as one seven base colors of his work in the mids.

Newton used a prism on a beam of sunlight, which resulted in a rainbow-like band of colors on the wall. He could see seven colors red, orange, yellow, green, blue, indigo and violet. He also noted the infinite spectrum between the base colors. Indigo is a perplexing color that has four major tones. The color electric indigo is a bright and saturated color between the traditional indigo and violet.

This is the brightest color indigo that can be approximated on a computer screen; it is a color located between blue, a primary color and the color violet of the RGB color wheel.

The web color blue-violet or deep indigo is a tone of indigo brighter than pigment indigo, but not as bright as electric indigo. The web color indigo is equivalent to the color indigo that is usually reproduced in pigments and colored pencils.

The color of indigo dye is a different color from either spectrum indigo or pigment indigo. This is the actual color of the dye. A vat full of this dye is a darker color, approximating the web color midnight blue. Indigo may not be your first thought when it comes to home decor, but it can add a sense of tradition and depth to a room. Indigo is bold.

But its depth is rich and comforting. To add depth to the walls, add some applied molding and paint it the same color. Indigo paint on the walls can bring dazzle and coziness to a library, den, or home theatre.