Knowledge (XXG)

Color code

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subtends less than 12' (0.2° or ~2 mm at a viewing distance of 50 cm), so color stimulus of at least 3 mm in diameter or thickness is recommended when the color is on paper or on a screen. Under normal conditions, colored backgrounds do not affect the interpretation of color codes, but
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are multidimensional with color (black, red) and shape (club, diamond, heart, spade), which are partially redundant since clubs and spades are always black and diamonds and hearts are always red. Tasks using categorical color codes can be classified as identification tasks, where a single stimulus is
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and blind people, and may even be inaccessible for those with normal color vision, since use of many colors to code many variables can lead to use of confusingly similar colors. Only 15–40% of the colorblind can correctly name surface color codes with 8–10 color categories, most of which test as
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recommends categorical color codes in seven colors: red, orange, yellow, green, blue, white and black. Adding redundant coding of luminosity and colorfulness adds information and increases speed and accuracy of color decoding tasks. Color codes are superior to others (encoding to letters, shape,
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The ideal color scheme for a categorical color code depends on whether speed or accuracy is more important. Despite humans being able to distinguish 150 distinct colors along the hue dimension during comparative task, evidence supports that color schemes where colors differ only by hue (equal
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Several studies demonstrate a subjective preference for color codes over achromatic codes (e.g. shapes), even in studies where color coding did not increase performance over achromatic coding. Subjects reported the tasks as less monotonous and less inducing of eye strain and fatigue.
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size, etc.) in certain types of tasks. Adding color as a redundant attribute to a numeral or letter encoding in search tasks decreased time by 50–75%, but in unidimensional identification tasks, using alphanumeric or line inclination codes caused less errors than color codes.
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As chemistry and other technologies advanced, it became expedient to use coloration as a signal for telling apart things that would otherwise be confusingly similar, such as
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A color code encodes a variable, which may have different representations, where the color code type should match the variable type:
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Color codes present some potential problems. On forms and signage, the use of color can distract from black and white text.
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mildly colorblind. This finding uses ideal illumination; when dimmer illumination is used, performance drops sharply.
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Christ, Richard E. (December 1975). "Review and Analysis of Color Coding Research for Visual Displays".
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The earliest examples of color codes in use are for long-distance communication by use of flags, as in
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Bedford, R. E.; Wyszecki, G. W. (1 February 1958). "Wavelength Discrimination for Point Sources".
1955: 1781: 1187: 1095: 989: 640: 621: 569: 561: 538: 497: 466: 335: 99: 796:. Wright Air Development Center, Air Research and Development Command, United States Air Force. 1891: 1844: 1441: 1256: 1195: 1147: 1080: 1075: 1053: 982: 582: 548: 477: 426: 419: 351: 346: 267: 154: 225:– the colors are unordered, but are chosen to maximize saliency of the colors, by maximizing 176:– the variable may represent discrete values of unordered qualitative data (e.g. blood type) 1839: 1834: 1814: 1809: 1572: 1339: 1217: 1167: 1162: 1134: 1100: 1090: 960: 835: 774: 732: 694: 441: 226: 201:: 1,2,3,4,5,6) are sometimes treated as a categorical variable, despite the ordered nature. 1869: 1859: 1854: 1819: 1721: 1557: 1504: 1394: 1327: 1142: 1058: 1036: 522: 396: 316: 158: 95: 1919: 1864: 1849: 1829: 1824: 1607: 1421: 1416: 1244: 1222: 1157: 1029: 994: 967: 884: 839: 506: 400: 380: 131: 127: 1944: 1804: 1389: 1275: 1200: 1177: 1117: 1041: 1024: 930: 451: 1639: 1602: 1595: 1401: 1384: 1376: 1317: 1309: 1172: 1016: 853: 599: 487: 304:
chromatic (and/or low) illumination of surface color code can degrade performance.
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and other munitions, which are color-coded according to their pyrotechnic contents
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often incorporate colors (such as the widely used "Code Blue" indicating a
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Color codes are often designed without consideration for accessibility to
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Cole, Barry L (1 July 2004). "The handicap of abnormal colour vision".
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The ability to discriminate color differences decreases rapidly as the
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Human Factors: The Journal of the Human Factors and Ergonomics Society
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Human Factors: The Journal of the Human Factors and Ergonomics Society
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Clerical vestments, frontals and altar hangings in Christian churches
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is a system for encoding and representing non-color information with
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Transactions of the American Society of Civil Engineers: Volume 29
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The Surface Colours used as Visual Signals on Aids to Navigation
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To distinguish rarity or quality of items in adventure and
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When color is the only varied attribute, the color code is
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adopted a color code scheme for such communication wherein
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System for displaying information by using different colors
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to facilitate communication. This information tends to be
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in electrical and electronic devices, and pharmaceutical
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AKA resistor or EIA color code (today – IEC 60062:2016)
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Audio and video interfaces and connectors § Color codes
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are typically treated as a categorical variable (e.g.
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For the computer science and graph theory method, see
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(1958). 8: 534:NATO Military Symbols for Land Based Systems 328:Systems incorporating color-coding include: 1925: 1717: 1462: 1305: 935: 913: 899: 891: 680: 678: 676: 674: 672: 670: 668: 767:Journal of the Optical Society of America 718: 716: 714: 712: 710: 708: 1694:International Commission on Illumination 821: 819: 386:Three-phase electric power § Color codes 74:by adding descriptive text and removing 805: 803: 652: 1684:Color Association of the United States 262:(each encoding separate variables) or 102:chart used in certain kinds of wiring 7: 229:between all color pair permutations. 828:Clinical and Experimental Optometry 794:The Use of Color in Coding Displays 1548:Blue–green distinction in language 840:10.1111/j.1444-0938.2004.tb05056.x 809:See, e.g., Michael Richard Cohen, 636:Color coding in data visualization 25: 518:Homeland Security Advisory System 461:At point of sale (especially for 1924: 1915: 1914: 1705:International Colour Association 1288: 878: 47: 381:Surround sound ports and cables 1700:International Color Consortium 1689:International Colour Authority 271:shown and must be identified ( 258:, where the dimensions can be 1: 1765:List of Crayola crayon colors 273:connotatively or denotatively 218:The types of color code are: 498:Underground utility location 372:used to jump-start a vehicle 364:Ethernet twisted-pair wiring 347:Optical fibers § Color codes 1568:Traditional colors of Japan 1345:Achromatic colors (Neutral) 1228:Multi-primary color display 1002:Spectral power distribution 338:– telecommunications wiring 38:Color code (disambiguation) 1972: 737:10.1177/001872086200400604 699:10.1177/001872087501700602 211: 31: 1910: 1428:Color realism (art style) 1286: 1086:Evolution of color vision 612:Category:Ribbon symbolism 493:Queen bee birth year code 376:PC99 connectors and ports 1745:List of colors (compact) 1563:Color in Chinese culture 1213:Digital image processing 946:Electromagnetic spectrum 503:Hospital emergency codes 1750:List of colors by shade 465:within a huge range of 76:less pertinent examples 1755:List of color palettes 779:10.1364/JOSA.48.000129 750:IALA (December 2009). 103: 36:. For other uses, see 1679:Color Marketing Group 1434:On Vision and Colours 1367:Tinctures in heraldry 978:Structural coloration 596:of the combat mindset 545:In social functions: 529:List of Rainbow Codes 366:– local area networks 358:Electronic color code 192:Quantitative variable 98: 1760:List of color spaces 1652:Tint, shade and tone 1535:Cultural differences 1350:Polychromatic colors 1335:Complementary colors 1323:Monochromatic colors 887:at Wikimedia Commons 437:Characteristic light 174:Categorical variable 1740:List of colors: N–Z 1735:List of colors: G–M 1730:List of colors: A–F 594:Cooper's Color Code 578:green-collar worker 566:white-collar worker 483:Kerbside collection 388:(electrical wiring) 130:communication. The 72:improve the article 1787:List of web colors 1782:List of RAL colors 1188:Color reproduction 1153:Lüscher color test 990:Color of chemicals 854:"Color-Coded Loot" 641:Secondary notation 570:pink-collar worker 562:Blue-collar worker 539:Rainbow Herbicides 478:Fire extinguishers 458:Other technology: 427:role-playing games 336:25-pair color code 268:playing card suits 104: 100:25-pair color code 1938: 1937: 1878: 1877: 1660: 1659: 1452: 1451: 1442:Theory of Colours 1284: 1283: 1196:Color photography 1148:Color preferences 1091:Impossible colors 1081:Color vision test 1076:Color temperature 1054:Color calibration 983:Animal coloration 883:Media related to 811:Medication Errors 583:Handkerchief code 549:Black hat hacking 514:In military use: 420:League of Legends 352:Electrical wiring 93: 92: 16:(Redirected from 1963: 1928: 1927: 1918: 1917: 1718: 1584:Color dimensions 1573:Human skin color 1463: 1340:Analogous colors 1306: 1292: 1218:Color management 1135:Color psychology 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Index

Color coding
Color-coding
Color code (disambiguation)
excessive
irrelevant
improve the article
less pertinent examples

25-pair color code
colors
categorical
semaphore
United Kingdom
red
danger
white
safety
wiring
pills
Categorical variable
Binary variables
sex
Quantitative variable
die
Color scheme § In maps and data visualization
color difference
playing card suits
connotatively or denotatively
luminosity
colorfulness

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