Talk:Duke blue

Pantone 287
According to multiple sources on the WWW, Pantone 287 = rgb: 0 51 141; Duke Blue is actually Prussian Blue Tee Owe (talk) 22:54, 21 February 2010 (UTC)

The university has established that the web equivalent of Duke blue, in hex, is #001A57. --Opertinicy (talk) 04:20, 11 October 2012 (UTC)
 * Pantone -> hexadecimal are approximations.


 * Normally, these approximations are "close enough". In this case, though, the OP has a point – PMS287 is different enough from #001A57 to warrant mention. Here's a selection of references:


 * {| class="wikitable sortable"

! Hex RGB ! H&deg; !! S% !! V% ! Source
 * - align="right"
 * style="color:white; background-color:#00338D;" | #00338D
 * 218 || 100 || 55
 * align="left" | Pantone 287 from Duke style guide, RGB from swatch at Pantone website
 * - align="right"
 * style="color:white; background-color:#00529B;" | #00529B
 * 208 || 100 || 61
 * align="left" | Pantone 287 from Duke style guide, RGB from Alt source 1
 * - align="right"
 * style="color:white; background-color:#003798;" | #003798
 * 218 || 100 || 60
 * align="left" | Pantone 287 from Duke style guide, RGB from Alt source 2
 * - align="right"
 * style="color:white; background-color:#003893;" | #003893
 * 217 || 100 || 58
 * align="left" | Pantone 287 from Duke style guide, RGB from Alt source 3, Alt source 4
 * - align="right"
 * style="color:white; background-color:#00009C;" | #00009C
 * 240 || 100 || 61
 * align="left" | Previous value of "Duke blue" at List of colors: A–F, "Duke blue" at Encycolorpedia
 * - align="right"
 * style="color:white; background-color:#003087;" | #003087
 * 219 || 100 || 53
 * align="left" | Pantone 287 from Duke style guide, RGB from Alt source 5, RGB from Alt source 6
 * - align="right"
 * style="color:white; background-color:#0034CD;" | #0034CD
 * 225 || 100 || 80
 * align="left" | RGB conversion of CMYK val (100, 75, 2, 18) at Alt source 6
 * - align="right"
 * style="color:white; background-color:#454F87;" | #454F87
 * 231 || 49 ||  53
 * align="left" | Pantone 287 from Duke style guide, RGB from Alt source 7
 * - align="right"
 * style="color:white; background-color:#003153;" | #003153
 * 205 || 100 || 33
 * align="left" | "Prussian blue" from The Origin of Duke Blue, RGB from List of colors: N–Z and Encycolorpedia
 * - align="right"
 * style="color:white; background-color:#0046E2;" | #0046E2
 * 221 || 100 || 89
 * align="left" | "CMYK (100, 69, 0, 11.5)" from The Origin of Duke Blue, RGB from EasyRGB, HSL and CMYK from Encycolorpedia
 * - align="right"
 * style="color:white; background-color:#00009C;" | #00009C
 * 240 || 100 || 61
 * align="left" | "RGB (0, 0, 156)" from The Origin of Duke Blue, HSL from Encycolorpedia
 * - align="right"
 * style="color:white; background-color:#001A57;" | #001A57
 * 222 || 100 || 34
 * align="left" | Swatch #8 at Duke color palette (labeled "#001A57; PMS288; CMYK 100/75/6/24"), Duke style guide
 * - align="right"
 * style="color:white; background-color:#0736A4;" | #0736A4
 * 222 || 96 ||  64
 * align="left" | Swatch #9 at Duke color palette (labeled "#0736A4; PMS287; CMYK 100/72/2/12")
 * - align="right"
 * style="color:white; background-color:#0030B6;" | #0030B6
 * 224 || 100 || 71
 * align="left" | RGB conversion of CMYK val (100, 75, 6, 24) from label of swatch #8 at Duke color palette
 * - align="right"
 * style="color:white; background-color:#003FDC;" | #003FDC
 * 223 || 100 || 86
 * align="left" | RGB conversion of CMYK val (100, 72, 2, 12) from label of swatch #9 at Duke color palette
 * }


 * Note in particular the discrepancies between the style guide and the color palette. The style guide says "The Duke logo blue Pantone color for Print is PMS 287. This same Duke blue for the web is #001A57." However, the color palette says #001A57 is PMS 288 (not 287), and that PMS 287 is #0736A4 (not #001A57).


 * Further discrepancies are found in The Origin of Duke Blue under "Technical details": "CMYK (100, 69, 0, 11.5)" converts to #0046E2 (HSL 221, 100, 89). "RGB 0, 0, 156" is #00009C (consistent with what Encycolorpedia calls "Duke blue"). "Hue=160 Saturation =240 Brightness=73" appears to be taken from the Windows color picker, incorrectly using the term "Brightness" for what is actually Luminance, and using the non-standard Windows ranges for the values (H=0–239, S=0–240, L=0–240 instead of H=0–359&deg;, S/L=0–100%). Taking that into account results in HSL of (241, 100, 30), very close to the HSL for #00009C (240, 100, 31), and probably what they intended. However, even taking that into account, they've still specified two additional self-inconsistent values (#00009C and #0046E2) in addition to the supposed #001A57. Of course, the section starts with "Duke Blue is registered as number 287 in the Pantone® Color Matching System. Colors in the range of Pantone® numbers 283 to 289 are used for Duke Blue," adding 6 more Pantone colors and at least 42 more possible RGB simulations to the possible values. While there is clearly variance in how colors are represented in/on different physical media, the range being represented here seems unreasonably wide.
 * (Note that Duke blue blindly copied the 4 self-inconsistent values for hex, RGB, HSV, CMYK from this source. I've set everything to values consistent with #001A57 for now). —&#91;  Alan M 1  (talk) &#93;— 01:25, 30 October 2013 (UTC), edited —&#91;   Alan M 1  (talk) &#93;— 11:14, 30 October 2013 (UTC)