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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
270:
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
319:
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
291:
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,
278:
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
295:
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.
292:
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.
153:
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
1542:
275:), versus search tasks, where a color stimulus must be found within a field of heterogenous stimuli. Performance in these tasks is measured by speed and/or accuracy.
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287:) should have a maximum of 8eightcategories with optimized stimulus spacing along the hue dimension, though this would not be color blind accessible. The
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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:
63:
59:
517:
1704:
1929:
1883:
118:(representing unordered/qualitative categories) though may also be sequential (representing an ordered/quantitative variable).
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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.
1764:
552:
1567:
1227:
1001:
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mildly colorblind. This finding uses ideal illumination; when dimmer illumination is used, performance drops sharply.
37:
1769:
1356:
905:
385:
241:– only a subset of a continuous color code are used (still ordered), where each is distinguishable from the others.
75:
1534:
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754:(2 ed.). International Association of Marine Aids to Navigation and Lighthouse Authorities. pp. 7–9.
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363:
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375:
1678:
1433:
977:
898:
685:
Christ, Richard E. (December 1975). "Review and
Analysis of Color Coding Research for Visual Displays".
528:
357:
266:(encoding the same variable). Partial redundancy sees one variable as a subset of another. For example,
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1152:
126:
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:
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796:. Wright Air Development Center, Air Research and Development Command, United States Air Force.
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201:: 1,2,3,4,5,6) are sometimes treated as a categorical variable, despite the ordered nature.
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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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1624:
1232:
556:
446:
1673:
955:
826:
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
725:
Human
Factors: The Journal of the Human Factors and Ergonomics Society
687:
Human
Factors: The Journal of the Human Factors and Ergonomics Society
1896:
1499:
1489:
622:
Clerical vestments, frontals and altar hangings in
Christian churches
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147:
110:
is a system for encoding and representing non-color information with
254:. When other attributes are varied (e.g. shape, size), the code is
1524:
1519:
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Transactions of the
American Society of Civil Engineers: Volume 29
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111:
94:
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The
Surface Colours used as Visual Signals on Aids to Navigation
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198:
194:– the variable represents ordered, quantitative data (e.g. age)
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42:
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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
150:, with other colors having similar assignments of meaning.
134:
adopted a color code scheme for such communication wherein
27:
System for displaying information by using different colors
235:– the colors are ordered and form a smooth color gradient.
114:
to facilitate communication. This information tends to be
157:
in electrical and electronic devices, and pharmaceutical
469:: to quickly differentiate variants, brands, categories)
360:
AKA resistor or EIA color code (today – IEC 60062:2016)
342:
Audio and video interfaces and connectors § Color codes
71:
182:
are typically treated as a categorical variable (e.g.
32:
For the computer science and graph theory method, see
590:, Guidelines for color-coded alerts in public warning
1882:
1795:
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938:
929:
723:Jones, Mari Riess (December 1962). "Color Coding".
214:Color scheme § In maps and data visualization
197:Discrete quantitative data (e.g. the 6 sides of a
1543:Linguistic relativity and the color naming debate
405:To distinguish friend from foe, for instance in
354:– AC power phase, neutral, and grounding wires
906:
792:Conover, Donald W.; Kraft, Conrad L. (1958).
8:
534:NATO Military Symbols for Land Based Systems
328:Systems incorporating color-coding include:
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1694:International Commission on Illumination
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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
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1442:Theory of Colours
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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:
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16:(Redirected from
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1584:Color dimensions
1573:Human skin color
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1340:Analogous colors
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1218:Color management
1135:Color psychology
1101:Opponent process
1017:Color perception
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834:(4–5): 258–275.
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442:Navigation light
332:In electricity:
256:multidimensional
227:color difference
180:Binary variables
165:Encoded Variable
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1163:Political color
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813:(2007), p. 119.
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1241:
1238:
1234:
1231:
1229:
1226:
1225:
1224:
1221:
1219:
1216:
1214:
1211:
1207:
1204:
1202:
1201:Color balance
1199:
1198:
1197:
1194:
1193:
1191:
1189:
1185:
1179:
1178:Chromotherapy
1176:
1174:
1171:
1169:
1166:
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1149:
1146:
1144:
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1126:
1125:
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1118:Tetrachromacy
1116:
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1089:
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1062:
1060:
1057:
1055:
1052:
1048:
1045:
1043:
1042:Achromatopsia
1040:
1039:
1038:
1035:
1031:
1028:
1027:
1026:
1025:Chromesthesia
1023:
1022:
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1018:
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947:
944:
943:
941:
939:Color physics
937:
934:
932:
931:Color science
928:
923:
916:
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909:
904:
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855:
849:
846:
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837:
833:
829:
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795:
788:
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746:
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629:
623:
620:
619:
618:In religion:
617:
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508:
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473:Bottled gases
471:
468:
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398:
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387:
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370:Jumper cables
368:
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67:
65:
61:
56:This article
54:
45:
44:
39:
35:
30:
19:
1640:Fluorescence
1603:Colorfulness
1596:Dichromatism
1440:
1432:
1402:Chromaticity
1385:Color mixing
1377:Color theory
1310:Color scheme
1173:Chromophobia
1122:
1068:
858:. Retrieved
856:. Giant Bomb
848:
831:
827:
810:
793:
787:
770:
766:
760:
751:
745:
728:
724:
690:
686:
659:
655:
608:
600:Rank in judo
488:Pipe marking
418:
412:
406:
401:magic points
327:
314:
311:
301:visual angle
298:
294:
285:colorfulness
277:
263:
259:
255:
251:
249:
238:
232:
222:
217:
168:
152:
125:
107:
105:
81:
70:Please help
58:may contain
57:
34:Color-coding
29:
18:Color coding
1951:Color codes
1777:Color chart
1635:Iridescence
1467:Basic terms
1458:Color terms
1412:Color wheel
1407:Color solid
1271:Color space
1257:subtractive
1240:Color model
1111:Unique hues
1007:Colorimetry
973:Chromophore
574:grey-collar
317:color blind
260:independent
246:Categorical
223:Categorical
116:categorical
84:August 2023
1945:Categories
1797:Shades of:
1630:Brightness
1362:Web colors
1318:Color tool
1301:philosophy
1206:Color cast
1106:Afterimage
1096:Metamerism
1069:Color code
1064:Color task
1047:Dichromacy
885:Color code
773:(2): 129.
647:References
281:luminosity
233:Continuous
212:See also:
146:signified
138:signified
108:color code
64:irrelevant
1956:Encodings
1647:Grayscale
1620:Lightness
1615:Luminance
1424:(fashion)
1124:The dress
588:ISO 22324
553:white hat
463:packaging
408:StarCraft
308:Criticism
264:redundant
128:semaphore
60:excessive
1920:Category
1902:Lighting
1625:Darkness
1445:(Goethe)
1245:additive
1233:Quattron
630:See also
557:grey hat
467:products
447:Sea mark
324:Examples
239:Discrete
66:examples
1884:Related
1845:Magenta
1770:history
1674:Pantone
961:Visible
956:Rainbow
860:13 June
607:colors
122:History
1897:Qualia
1892:Vision
1840:Purple
1835:Violet
1815:Yellow
1810:Orange
1505:Orange
1500:Purple
1490:Yellow
924:topics
605:Ribbon
397:Health
155:wiring
148:safety
140:danger
112:colors
1930:Index
1870:Black
1860:White
1855:Brown
1820:Green
1722:Lists
1714:Names
1696:(CIE)
1665:Color
1525:Brown
1520:White
1510:Black
1480:Green
1299:Color
995:Water
951:Light
922:Color
417:, or
208:Types
159:pills
144:white
1865:Gray
1850:Pink
1830:Blue
1825:Cyan
1515:Gray
1495:Pink
1475:Blue
1262:CMYK
862:2016
609:see:
414:Halo
399:and
289:IALA
283:and
142:and
1805:Red
1591:Hue
1485:Red
1250:RGB
836:doi
775:doi
733:doi
695:doi
199:die
184:sex
136:red
62:or
1947::
832:87
830:.
818:^
802:^
771:48
769:.
727:.
707:^
691:17
689:.
667:^
576:,
572:,
568:,
564:,
555:,
551:,
509:),
411:,
161:.
106:A
914:e
907:t
900:v
864:.
842:.
838::
781:.
777::
739:.
735::
729:4
701:.
697::
186:)
86:)
82:(
78:.
68:.
40:.
20:)
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