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Where do the color codes come from? I haven't been able to find any reliable source on the Web. Yes, I found pages claiming that cobalt blue is such and such in RGB, but no evidence to back that up. —The preceding unsigned comment was added by 213.157.164.98 ( talk • contribs) .
This article should focus on cobalt blue as a pigment, not as a color. -- jacobolus (t) 21:36, 20 September 2007 (UTC)
Well, it should definitely focus on one or the other. At the moment the intro paragraph mixes sentences about the colour and about the pigment without making clear which is which, with very confusing results. 216.75.183.13 ( talk) 16:07, 26 April 2008 (UTC)
Reference is in their site's fps. Sonic was also coloured the same to match the logo. Put it first then Nintendo DS because of dating. —Preceding unsigned comment added by 85.240.48.162 ( talk) 17:47, 28 July 2008 (UTC)
The header paragraph describes it as "slightly desaturated". The colour co-ords on the right hand boxout show it as having a Saturation value (under HSV) of 100%, and the RGB values bear this out as one of them is 0% (making it fully saturated). Which is correct, then?
Also, though it wasn't my addition, I couldn't help noticing what the above contributor wrote, and looking for the referenced entry in the history. Not sure why one of the world's most recognisable game characters is less notable than the opinions of some painter i've never heard of on the nowadays pretty moot subject of cobalt vs ultramarine? (The Sega logo and DS, less important I suppose, otherwise you could go on to list any number of logos using the colour and devices/items that are sold with that hue casing) 193.63.174.210 ( talk) 17:26, 4 December 2008 (UTC)
Myself, I find terms like "slightly desaturated" and "stoichiometric" to be bringing in obscurity just for the sake of obscurity. Why not just be clear and direct about what matters about the colour, for instance that it is very stable. Some history would be nice, famous uses, etc. Good point about pigment versus colour. Cheers Billyshiverstick ( talk) 03:03, 29 June 2012 (UTC)
This article is about the blue pigment formed by cobalt oxide and alumina, sometimes called Thénard's blue. It claims that in the first half of the nineteenth century Norway was a world leader in the production of "cobalt blue". The Norwegian product, however, was not Thénard's blue but smalt which is correctly described in English Wikipedia as a cobalt glass. Smalt was cobalt oxide fused with potash and quartz making a colored potassium silicate glass which was crushed to a fine powder. It was used particularaly for blue glazes on china but lost that market to a third blue pigment, synthetic ultramarine which was manufactured commercially beginning in the 1830's. To my knowledge, neither Thénard's blue nor synthetic ultramarine were ever produced in Norway. The historic "blue color" production is well-known in Norway today. Its chemistry, however, is not. Roufu ( talk) 04:36, 13 November 2013 (UTC)
To clear up-- do you really think the world's biggest producer of smalt never added CoO to alumina instead is silica to make cobalt blue instead? Seems a natural business extention, as there was a market for the pigment in other uses. And if not why not ?? Next, suppose you did try to color molten glass with cobalt aluminate? Would it not work? Is cobalt aluminate-colored transparent glass unknown? I've looked at a lot of online old books (again you have to stay away from books repeating WPs mistakes) and they're so far been unhelpful. S B H arris 08:23, 13 November 2013 (UTC)
The spectrum in the graph shows a spectrometer reading from the brooch shown in the picture gallery. The colour shown in the image is incorrect, as it is coded by the camera as pure blue. The spectral power distribution clearly shows that cobalt blue is a kind of spectral purple (conventionally called violet), with a dominant wavelength of 456nm, calculated from CIE XYZ. Individuals with good colour vision will see this as blue with a degree of purple. The graph shows that the sample measured has a peak reflectance of about 35% of light in the lower wavelengths. This may be slightly higher as the same has a degree of specular reflectance. This gives it a glossy appearance, which can confuse the spectrometer to some degree. The graph shows the spectrometer sample 2x to illustrate what higher reflectance would look like. This would simulate looking at the sample under bright light. The measurement was taken with an xrite i1pro spectrometer in high resolution mode, which measures the spectrum at 3.3nm intervals from 350 to 740nm. TxB ( talk) 14:19, 29 April 2018 (UTC)
This section can be improved by adding relevant citations from the literature on color. -- TxB ( talk) 16:33, 29 April 2018 (UTC)
An entry in List of colors: A–F contained a link to this page.
The entry is :
I don't see any evidence that this color is discussed in this article and plan to delete it from the list per this discussion: Talk:List_of_colors#New_approach_to_review_of_entries
If someone decides that this color should have a section in this article and it is added, I would appreciate a ping.-- S Philbrick (Talk) 14:52, 23 August 2018 (UTC)
This article is rated Stub-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||||||
|
Where do the color codes come from? I haven't been able to find any reliable source on the Web. Yes, I found pages claiming that cobalt blue is such and such in RGB, but no evidence to back that up. —The preceding unsigned comment was added by 213.157.164.98 ( talk • contribs) .
This article should focus on cobalt blue as a pigment, not as a color. -- jacobolus (t) 21:36, 20 September 2007 (UTC)
Well, it should definitely focus on one or the other. At the moment the intro paragraph mixes sentences about the colour and about the pigment without making clear which is which, with very confusing results. 216.75.183.13 ( talk) 16:07, 26 April 2008 (UTC)
Reference is in their site's fps. Sonic was also coloured the same to match the logo. Put it first then Nintendo DS because of dating. —Preceding unsigned comment added by 85.240.48.162 ( talk) 17:47, 28 July 2008 (UTC)
The header paragraph describes it as "slightly desaturated". The colour co-ords on the right hand boxout show it as having a Saturation value (under HSV) of 100%, and the RGB values bear this out as one of them is 0% (making it fully saturated). Which is correct, then?
Also, though it wasn't my addition, I couldn't help noticing what the above contributor wrote, and looking for the referenced entry in the history. Not sure why one of the world's most recognisable game characters is less notable than the opinions of some painter i've never heard of on the nowadays pretty moot subject of cobalt vs ultramarine? (The Sega logo and DS, less important I suppose, otherwise you could go on to list any number of logos using the colour and devices/items that are sold with that hue casing) 193.63.174.210 ( talk) 17:26, 4 December 2008 (UTC)
Myself, I find terms like "slightly desaturated" and "stoichiometric" to be bringing in obscurity just for the sake of obscurity. Why not just be clear and direct about what matters about the colour, for instance that it is very stable. Some history would be nice, famous uses, etc. Good point about pigment versus colour. Cheers Billyshiverstick ( talk) 03:03, 29 June 2012 (UTC)
This article is about the blue pigment formed by cobalt oxide and alumina, sometimes called Thénard's blue. It claims that in the first half of the nineteenth century Norway was a world leader in the production of "cobalt blue". The Norwegian product, however, was not Thénard's blue but smalt which is correctly described in English Wikipedia as a cobalt glass. Smalt was cobalt oxide fused with potash and quartz making a colored potassium silicate glass which was crushed to a fine powder. It was used particularaly for blue glazes on china but lost that market to a third blue pigment, synthetic ultramarine which was manufactured commercially beginning in the 1830's. To my knowledge, neither Thénard's blue nor synthetic ultramarine were ever produced in Norway. The historic "blue color" production is well-known in Norway today. Its chemistry, however, is not. Roufu ( talk) 04:36, 13 November 2013 (UTC)
To clear up-- do you really think the world's biggest producer of smalt never added CoO to alumina instead is silica to make cobalt blue instead? Seems a natural business extention, as there was a market for the pigment in other uses. And if not why not ?? Next, suppose you did try to color molten glass with cobalt aluminate? Would it not work? Is cobalt aluminate-colored transparent glass unknown? I've looked at a lot of online old books (again you have to stay away from books repeating WPs mistakes) and they're so far been unhelpful. S B H arris 08:23, 13 November 2013 (UTC)
The spectrum in the graph shows a spectrometer reading from the brooch shown in the picture gallery. The colour shown in the image is incorrect, as it is coded by the camera as pure blue. The spectral power distribution clearly shows that cobalt blue is a kind of spectral purple (conventionally called violet), with a dominant wavelength of 456nm, calculated from CIE XYZ. Individuals with good colour vision will see this as blue with a degree of purple. The graph shows that the sample measured has a peak reflectance of about 35% of light in the lower wavelengths. This may be slightly higher as the same has a degree of specular reflectance. This gives it a glossy appearance, which can confuse the spectrometer to some degree. The graph shows the spectrometer sample 2x to illustrate what higher reflectance would look like. This would simulate looking at the sample under bright light. The measurement was taken with an xrite i1pro spectrometer in high resolution mode, which measures the spectrum at 3.3nm intervals from 350 to 740nm. TxB ( talk) 14:19, 29 April 2018 (UTC)
This section can be improved by adding relevant citations from the literature on color. -- TxB ( talk) 16:33, 29 April 2018 (UTC)
An entry in List of colors: A–F contained a link to this page.
The entry is :
I don't see any evidence that this color is discussed in this article and plan to delete it from the list per this discussion: Talk:List_of_colors#New_approach_to_review_of_entries
If someone decides that this color should have a section in this article and it is added, I would appreciate a ping.-- S Philbrick (Talk) 14:52, 23 August 2018 (UTC)