Talk:Cyan

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The see also list is precisely that: also. It doesn't properly include things that are already linked in the preceding paragraphs. I'm taking them back out. Vicki Rosenzweig

There was an edit conflict that confused me, but I have already taken them back out. --Ellmist

Misplaced conversation moved to User talk:Cyan/Atlas Shrugged Redirects. -- Cyan 01:39, 5 Sep 2003 (UTC)

Contents

[edit] are you back? :)

or was that edit the other day just a little teaser? PLEASE come back! :) Kingturtle 04:44, 20 Feb 2004 (UTC)

[edit] Cyan Spectral Number

If cyan is a pure spectral color, what is its number in order from red to violet?? The order is:

  1. Red
  2. Orange
  3. Yellow
  4. Green
  5. Blue
  6. Indigo
  7. Violet

Cyan is not here. Is cyan sort of #4.5?? Can anyone make a complete list of pure spectral colors?? 66.245.123.52 18:41, 6 Sep 2004 (UTC)

There are infinitely many pure spectral colours, so it doesn't make much sense to number them. Cyan is between green and blue. --Zundark 22:11, 6 Sep 2004 (UTC)
Well, why don't people include cyan in the sequence?? 66.245.82.212 22:15, 6 Sep 2004 (UTC)
Sometimes they do. The list you give above is the traditional one, which I think originated with Newton. But it's not definitive. Omitting cyan is not really wrong, as long as you consider all shades of spectral cyan to be shades of green or blue. Similarly, you can omit indigo. --Zundark 22:25, 6 Sep 2004 (UTC)
Can you name some alternates?? 66.245.105.9 23:18, 6 Sep 2004 (UTC)
Alternates to what? If you mean alternates to the traditional list of spectral colours, I already gave three: add cyan and/or remove indigo. --Zundark 07:16, 7 Sep 2004 (UTC)
Any besides the 3 you already gave?? 66.245.73.148 02:04, 11 Sep 2004 (UTC)
There'd be infinitely many. Just chop the spectrum up any which way then attach names to the sections you get; e.g. red, reddish orange, orange, yellowish orange, yellow ... indigo, reddish indigo, bluish violet, violet, reddish violet (though you might want some more creative names).
The question is "How many ways can chop it up and end up with sections that fit with the way we ordinarily think about and talk about colours?" Slice it up into 84 sections, for example, and you'll be hard-pressed to tell the difference between the hue of one section and the next. Slice it in three, on the other hand and you'll end up with sections that vary very noticibly in hue.
So, anyway, what's the spectral number of cyan? Yeah, sort of 4.5 if you're using that numbering system. Does it make sense to number them? Perhaps, as long as you keep in mind that the numbering is arbitary.
Just because something is infinitely divisible doesn't mean you can't attach numbers to it. However, perhaps the best numbering system would be wavelength in nanometres (or frequency in petaHertz). - Jimp 24May05

[edit] Cyan in a user-friendly world

Someone wrote at Template talk:Colors that cyan is not-so-well-known by its name outside the world of computers. What do people know it as?? My answer is probably green-blue or blue-green. 66.32.242.23 22:02, 28 Oct 2004 (UTC)

[edit] Infobox

I'm alarmed by this infobox: I think it may oversimplify to a dangerous degree. For instance, RGB 0,100%,100% and CMYK 100%,0,0,0 are by no means the same color. In addition, why is a range of 0 to 255 chosen, when color science will generally use 0 to 1; percentages might be safer... There are already far too many people who asssume that 0 to 255 is the natural and only way to represent color values, who get confused when encountering other systems... In my opinion. Does the infobox have a talk page? Notinasnaid 13:30, 8 Apr 2005 (UTC)

[edit] Cyan problem

The most recent edit of the article (as of this post on its talk page) says that RGB cyan and CMYK cyan are not the same. Can anyone show the difference in detail?? Georgia guy 21:55, 8 Apr 2005 (UTC)

Well, I could try to explain the difference, but nobody can really show it, because you can only see CMYK on a printed page. The whole area of color and web pages is very difficult. There are good arguments against trying to show any color, because it may look utterly different between different screens. Color management is a nightmare lurking just behind any discussion of color and computers. I think I'd vote against any graphic which claimed to "show" CMYK versus RGB cyan. The best thing might be for you to put some cyan on your screen, and print it, then compare. Notinasnaid 08:31, 9 Apr 2005 (UTC)

neither RGB nor CMYK are very good/absolute ways to represent colors. a much better way is the so called CIE diagram. colors are represented as a X,Y coordinate in this diagram. http://en.wikipedia.org/wiki/Image:Cie_chromaticity_diagram_wavelength.png for picture. it shows all possible colors. a color system with 3 primaries like RGB covers a triangle shaped area on the diagram (called the gamut). for RGB, imagine a triangle between 470, 620, and 560. cyan can be said to be the area left of that triangle. the closer to the edge of the CIE diagram, the more pure/saturated this cyan color is. so RGB is not good at producing highly saturated cyan. printing ink is a bit better because the cyan printing ink color is outside the RGB gamut (if you ever wondered why a pc monitor can't reproduce cyan well). this also explains why CMYK and RGB cyan are different: they have different CIE coordinates.

[edit] "Closer to azure"

This text was just added: "Cyan ink is actually closer in color to azure, and the lighter shades resembling cyan are created by "half-toning"." There seems to be a problem here. What is the definition of "cyan" that it is unlike? To me, cyan is defined by being the color of cyan ink. There is a serious problem in Wikipedia that no sources are being given for color names and their meanings. Can we improve this? Notinasnaid 23:15, 7 February 2006 (UTC)

But when is "cyan" ink cyan? When it conforms to the lightest additive secondary between green and blue light. So it has best been defined as a stimulus optimum or as the subjective quale caused by it. This seems superior to letting your definition depend on the contingent avarage of ink hues that happens to be sold under the name "cyan". --MWAK 20:19, 27 February 2006 (UTC)
Can you provide a reference for this definition, which says that cyan inks aren't cyan? Any sort of reference would be a start on these color articles. The color articles are too subjective, and need references to conform to Wikipedia standards. Notinasnaid 10:15, 28 February 2006 (UTC)
Gerritsen gave the first exact and correct definitions using the word cyan; see http://www.colorsystem.com/projekte/engl/53gere.htm . Now as to the question whether I have good references proving cyan ink usually is only a fair approximation, I must confess I haven't found them. Of course simply looking at them should suffice, but that won't do here ;o).
Ok, here's another: "cyan: a greenish blue; blue ink used as a primary colour in printing" (Chamber's Dictionary, 2003). Given that, I think it's fair to say that both definitions are right, and to say that printing ink is not cyan in color is simply wrong. I will change the article. Notinasnaid 15:09, 28 February 2006 (UTC)

I'm sorry I made this edit, and never checked back to see if it was being removed and discussed. But it is obvious that the "cyan" of most printing inks is different than the cyan of rgb mixing. You can see it on the side of the funny papers, ad fliers and other color sections of newspapers, where bars or dots are printed of the primary ink colors. (examples with "light" variations: ••••••••) Or even computer printing cartridge packages. The "blue" is clearly deeper and less green than 00FFFF. It is much closer to 00C0FF, which is called azure here. (The "magenta" is also deeper and less blue than FF00FF, and is more like FF00C0. Yellow is the same FFFF00)Eric B 00:20, 26 August 2006 (UTC)

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