Talk:Shades of blue

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WikiProject Color (Rated Start-class, Mid-importance)
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Remove school colors?[edit]

Recently, school colors have found their way into this article. They probably should be deleted or moved to a new article concerning blue in school uniforms or to the articles on each school. Most of these school colors' notabilities extend no farther than the boundaries of the school, and since there are many schools with blue as a school color, half the shades of blue listed here could be school colors Purplebackpack89≈≈≈≈ 23:59, 15 July 2011 (UTC)

Question on title[edit]

Please see question at Wikipedia_talk:WikiProject_Color#Why_use_phrase_.22Varitations_of_....22_instead_of_.22Shades_of_....22. --Noleander (talk) 19:45, 25 September 2011 (UTC)

Anybody watching[edit]

I'd like to volunteer to sort these colors by hue. It would make them a lot more understandable and give them more context. — Preceding unsigned comment added by 50.46.108.115 (talk) 01:50, 23 December 2014 (UTC)

Anyone watching this article may want to include Wedgwood blue as it seems to be recognized by our sister site. Thanks, hydnjo (talk) 23:40, 10 June 2012 (UTC)

Federal Blue[edit]

"Federal Blue" redirects here, from the template, but the article itself makes no mention of the color. Either the template should be fixed to eliminate colors that do not have pages, a section on Federal Blue should be added, or a new Federal Blue article created. — Preceding unsigned comment added by 89.247.94.80 (talk) 04:00, 27 September 2012 (UTC)

  • Likewise "ceil" is listed on the list of colors and links to blue, but is not in the blue article itself. — Preceding unsigned comment added by 110.174.121.141 (talk) 02:08, 29 January 2013 (UTC)
  • Likewise "French Blue". Kiltpin (talk) 23:22, 24 February 2013 (UTC)
  • There is an article for Cobalt blue too. It should probably be added as well. Infodater (talk) 01:39, 8 February 2014 (UTC)

Blue (Munsell)[edit]

According to http://www.cis.rit.edu/research/mcsl2/online/munsell_data/real.dat Munsell’s “5B” is at x = 0.0965, y = 0.1558 in CIE 1931, which is close to 482 nm spectral and is anything bluish but certainly not #0093AF, a variation of cyan. Apparently some master of transformation contaminated Wikipedia with flawed Munsell-to-modern-systems data and all patterns of Munsell colors shall be re-examined. Incnis Mrsi (talk) 05:37, 17 June 2013 (UTC)

Some Munsell colors of equally spaced hues and (semi-arbitrarily) varied value/chroma to fit in the sRGB gamut.
"Munsell Blue" is not a color, and Munsell colors by definition don’t have color names – Indeed the whole point of Munsell’s system is to get away from a system of using names for colors, which he thought was unscientific and idiotic. No color called “Munsell” anything is appropriate for this page. The colors used on the article about the Munsell Color System all still seem completely fine to me. In particular, the colors shown in the image to the right are just fine, for what they are. –jacobolus (t) 05:25, 18 June 2013 (UTC)
I do not see anything idiotic in names, but… we talk specifically about 5B, isn’t it? You see these sRGB colors fine, I do not, and it’s this which is unscientific. The image at right is not a reliable source. Incnis Mrsi (talk) 06:12, 18 June 2013 (UTC)
In that data table, if you want to find a relevant color to look at, you want to be looking down for a color something along the lines of 5B 6/16, which has x=0.1310, y=0.2048, Y=30.050 (though I don’t remember precisely which lightness/chroma I used for the blue in that picture). Then you need to do a chromatic adaptation from the Illuminant C of the original data to a white point like D65. I recommend using CIECAT02, but I think I might have used the Bradford CAT when I ran the numbers the first time. –jacobolus (t) 05:38, 18 June 2013 (UTC)
x = 0.1310, y = 0.2048 is obviously a tint pushed deeply inside the sRGB gamut far beyond necessity. Such desaturated colors should not be used as alternative definitions (of blue, or whatever color term unless it inherently refers to a tint). So, do you agree to just drop it? Incnis Mrsi (talk) 06:12, 18 June 2013 (UTC)
I thought better and now I am not sure that it is deeply inside sRGB. But the method in any case is questionable if desaturation results in an RGB representation which lies so far from original spectral color. Maybe, the article needs two patters of “5B”, not one? The first for most saturated Munsell color which fits to sRGB, and the second for a reasonable visual approximation of an intended spectral? Incnis Mrsi (talk) 08:25, 18 June 2013 (UTC)
The “dominant wavelength” of a color is not a very good attribute to use when trying to understand its hue, and there’s great difficulty representing something like a spectrum with a medium like a computer display. I think you’re getting stuck on some ideas/calculations that seem contradictory/incorrect, but would be immediately cleared up if you read a book or two about color science. The best resource I know on the web is http://www.handprint.com/LS/CVS/color.html but it’s rather long and a bit rambling. If you want I can recommend some paper books. Also, if you get the chance ever, try to look at a physical Munsell Book of Color. The way its color chips are organized would likely make a great deal more sense. –jacobolus (t) 06:59, 19 June 2013 (UTC)