Description: In 1955, the Inter-Society Color Council (ISCC) and the US National Bureau of Standards (NBS) (now called NIST) produced the ISCC-NBS colour naming system [Kelly1976]. This system expresses common verbal colour descriptions, such as "light purplish pink," in terms of the Munsell system [Newhall1943]. Terms such as "light purplish pink" encompass a multitude of distinguishable colours. In fact, any Munsell colour whose hue is between 9P and 9RP, whose value is greater than 7.5, and whose chroma is between 5 and 9, would be considered a light purplish pink. The ISCC-NBS system formalizes such relationships. It gives colour names at three increasing levels of precision. In Level 1, a colour is designated very broadly, using one of 13 common names (pink, red, orange, brown, yellow, olive, yellow green, green, blue, purple, white, gray, or black). This description is commonly understood, but only approximate: there are many colours, for example, that would be called "red." In Level 2, 16 intermediate colour names are added (yellowish pink, reddish orange, reddish brown, orange yellow, yellowish brown, olive brown, greenish yellow, yellow green, olive green, yellowish green, bluish green, greenish blue, purplish blue, reddish purple, purplish pink, and purplish red). Combining the 16 intermediate terms with the 13 original terms from Level 1 gives a total of 29 Level 2 colour names. Level 3 extends Level 2 by adding modifiers such as light, deep, grayish, vivid, etc. In all, Level 3 contains 267 colour names, and is the most detailed level of the ISCC-NBS system. Each Level 3 term is defined as a subset, or "block," of the Munsell system [Kelly1976]. In 1958, [Kelly1958] calculated the centroid, in the Munsell system, of the block for each Level 3 term. The current file presents his results in a digital format, for use in computer applications. There are four columns of data. The first three give the index number, the Level 3 category name, and the Munsell centroid. The fourth column specifies whether a block is interior to the Munsell system (i.e. the block nowhere reaches the MacAdam limits) or on its periphery (i.e. the block does reach the MacAdam limits somewhere). This distinction is important because different methods were used to calculate the centroid in the two cases; see [Kelly1958] for details. There is less confidence in the accuracy of the peripheral centroids. [Kelly1958] indicates the peripheral cases by placing an asterisk after the centroids' Munsell coordinates. [Kelly1976] Kenneth L. Kelly & Deane B. Judd, "Color: Universal Language and Dictionary of Names," NBS Special Publication 440, 1976. Available online at http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nbsspecialpublication440.pdf or https://ia801701.us.archive.org/9/items/coloruniversalla00kell/coloruniversalla00kell.pdf [Newhall1943] S. M. Newhall, D. Nickerson, & D. B. Judd, "Final Report of the O.S.A. Subcommittee on the Spacing of the Munsell Colors," Journal of the Optical Society of America, Vol. 33, Issue 7, pp. 385-418, 1943. [Kelly1958] Kenneth L. Kelly, "Central Notations for the Revised ISCC-NBS Color-Name Blocks," Research Paper 2911, Journal of Research of the National Bureau of Standards, Vol. 61, No. 5, pp. 427-431, November 1958. http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nbsspecialpublication440.pdf or https://ia801701.us.archive.org/9/items/coloruniversalla00kell/coloruniversalla00kell.pdf Author: Paul Centore (April 27, 2016) Copyright 2016 Paul Centore This file is released under the GNU General Public License (see http://www.gnu.org/licenses/ ) DESCRIPTION ENDS HERE Number Category Centroid Location 1 Vivid pink 1.5R7/13 Peripheral 2 Strong pink 1.5R7.5/9.1 Peripheral 3 Deep pink 1.9R6.0/11.1 Interior 4 Light pink 2.5R8.6/5.2 Peripheral 5 Moderate pink 2.5R7.2/5.2 Interior 6 Dark pink 2.5R6.0/6.0 Interior 7 Pale pink 2.5R8.8/2.3 Peripheral 8 Grayish pink 2.5R7.2/2.3 Interior 9 Pinkish white 7.6R9.2/1.0 Peripheral 10 Pinkish gray 7.6R7.5/1.0 Interior 11 Vivid red 5.0R3.0/14.0 Peripheral 12 Strong red 4.0R4.5/12.0 Interior 13 Deep red 5.0R2.8/9.9 Interior 14 Very deep red 5.0R1.4/9.0 Peripheral 15 Moderate red 4.0R4.5/9.1 Interior 16 Dark red 4.5R2.8/6.8 Interior 17 Very dark red 3.5R1.2/4.9 Peripheral 18 Light grayish red 4.9R6.0/3.4 Interior 19 Grayish red 4.6R4.5/4.7 Interior 20 Dark grayish red 3.5R2.7/2.2 Interior 21 Blackish red 3.5R1.1/1.6 Peripheral 22 Reddish gray 6.5R5.5/1.1 Interior 23 Dark reddish gray 6.0R3.5/1.1 Interior 24 Reddish black 6.0R0.9/0.8 Peripheral 25 Vivid yellowish pink 8.0R7/13 Peripheral 26 Strong yellowish pink 8.0R7.5/9.0 Peripheral 27 Deep yellowish pink 5.6R6.0/12.4 Interior 28 Light yellowish pink 0.7YR8.6/4.8 Peripheral 29 Moderate yellowish pink 0.7YR7.2/4.8 Interior 30 Dark yellowish pink 7.0R6.0/6.0 Interior 31 Pale yellowish pink 2.1YR8.8/2.2 Peripheral 32 Grayish yellowish pink 0.5YR7.2/2.3 Interior 33 Brownish pink 6.5YR7.2/2.2 Interior 34 Vivid reddish orange 9.5R5.5/15.5 Peripheral 35 Strong reddish orange 9.5R5.5/12.0 Interior 36 Deep reddish orange 9.5R4.0/12.0 Interior 37 Moderate reddish orange 9.5R5.5/9.1 Interior 38 Dark reddish orange 9.5R4.0/9.1 Interior 39 Grayish reddish orange 0.5YR5.5/6.0 Interior 40 Strong reddish brown 0.5YR3.0/11.2 Peripheral 41 Deep reddish brown 9.8R1.5/7.5 Peripheral 42 Light reddish brown 0.5YR5.5/4.1 Interior 43 Moderate reddish brown 9.6R3.4/5.2 Interior 44 Dark reddish brown 9.5R1.3/3.6 Peripheral 45 Light grayish reddish brown 3.0YR5.5/2.3 Interior 46 Grayish reddish brown 9.9R3.4/2.3 Interior 47 Dark grayish reddish brown 9.5R2.0/2.0 Interior 48 Vivid orange 4.5YR6.6/16 Peripheral 49 Brilliant orange 4.5YR8.0/12.1 Peripheral 50 Strong orange 4.5YR6.5/12.1 Interior 51 Deep orange 4.5YR5.0/12.1 Interior 52 Light orange 4.5YR8/8.1 Peripheral 53 Moderate orange 4.6YR6.5/8.1 Interior 54 Brownish orange 4.5YR5.0/8.2 Interior 55 Strong brown 5.0YR3.5/8 Peripheral 56 Deep brown 5.0YR2.1/6 Peripheral 57 Light brown 5.5YR5.5/4.6 Interior 58 Moderate brown 5.5YR3.5/3.9 Interior 59 Dark brown 5.5YR1.6/3.6 Peripheral 60 Light grayish brown 6.5YR5.5/2.2 Interior 61 Grayish brown 5.6YR3.5/2.0 Interior 62 Dark grayish brown 5.5YR2.0/1.7 Interior 63 Light brownish gray 6.8YR5.5/1.0 Interior 64 Brownish gray 6.4YR3.5/0.9 Interior 65 Brownish black 7.5YR0.8/0.8 Peripheral 66 Vivid orange yellow 9.0YR7.2/16 Peripheral 67 Brilliant orange yellow 9.0YR8.4/12.1 Peripheral 68 Strong orange yellow 9.0YR7.2/12.1 Interior 69 Deep orange yellow 9.0YR6.0/12.1 Interior 70 Light orange yellow 9.0YR8.6/8.1 Peripheral 71 Moderate orange yellow 9.0YR7.2/8.1 Interior 72 Dark orange yellow 9.0YR6.0/8.1 Interior 73 Pale orange yellow 9.1YR8.6/4.4 Peripheral 74 Strong yellowish brown 9.0YR4.6/9.6 Peripheral 75 Deep yellowish brown 9.5YR2.9/6 Peripheral 76 Light yellowish brown 9.2YR6.6/4.7 Interior 77 Moderate yellowish brown 9.5YR4.5/4.0 Interior 78 Dark yellowish brown 9.5YR2.2/3.7 Peripheral 79 Light grayish yellowish brown 9.5YR6.4/2.4 Interior 80 Grayish yellowish brown 9.5YR4.6/2.1 Interior 81 Dark grayish yellowish brown 9.5YR2.4/1.8 Interior 82 Vivid yellow 4.0Y7.8/14.5 Peripheral 83 Brilliant yellow 4.0Y8.8/9.5 Peripheral 84 Strong yellow 4.0Y7.2/9.5 Interior 85 Deep yellow 4.0Y6.0/9.5 Interior 86 Light yellow 4.0Y8.8/6.6 Peripheral 87 Moderate yellow 4.0Y7.2/6.6 Interior 88 Dark yellow 4.0Y6.0/6.6 Interior 89 Pale yellow 4.2Y8.9/3.6 Peripheral 90 Grayish yellow 4.2Y7.2/3.6 Interior 91 Dark grayish yellow 4.0Y6.0/4.1 Interior 92 Yellowish white 4.1Y9.2/1.3 Peripheral 93 Yellowish gray 4.1Y7.5/1.3 Interior 94 Light olive brown 2.5Y5.0/8.4 Peripheral 95 Moderate olive brown 2.5Y3.5/6 Peripheral 96 Dark olive brown 2.5Y1.8/2.5 Peripheral 97 Vivid greenish yellow 9.5Y7.8/14.5 Peripheral 98 Brilliant greenish yellow 9.5Y8.8/9.5 Peripheral 99 Strong greenish yellow 9.5Y7.2/9.5 Interior 100 Deep greenish yellow 9.5Y6.0/9.5 Interior 101 Light greenish yellow 9.5Y8.8/6.6 Peripheral 102 Moderate greenish yellow 9.5Y7.2/6.6 Interior 103 Dark greenish yellow 9.5Y6.0/6.6 Interior 104 Pale greenish yellow 9.5Y8.9/4.1 Peripheral 105 Grayish greenish yellow 9.5Y7.2/4.1 Interior 106 Light olive 8.1Y5.1/8.0 Peripheral 107 Moderate olive 8.0Y3.5/5.8 Peripheral 108 Dark olive 8.0Y1.7/3.2 Peripheral 109 Light grayish olive 8.3Y5.5/2.4 Interior 110 Grayish olive 8.1Y3.5/2.3 Interior 111 Dark grayish olive 8.0Y2.0/2.0 Interior 112 Light olive gray 7.4Y5.5/1.3 Interior 113 Olive gray 8.1Y3.5/1.0 Interior 114 Olive black 9.0Y0.9/0.8 Peripheral 115 Vivid yellow green 5.0GY7.5/14.5 Peripheral 116 Brilliant yellow green 5.0GY8.5/9.1 Peripheral 117 Strong yellow green 5.0GY6.0/9.1 Interior 118 Deep yellow green 5.0GY4.0/9.1 Interior 119 Light yellow green 5.0GY8.6/5.2 Peripheral 120 Moderate yellow green 5.0GY6.0/5.2 Interior 121 Pale yellow green 3.5GY8.7/2.2 Peripheral 122 Grayish yellow green 4.4GY6.1/2.2 Interior 123 Strong olive green 5.0GY3.2/7.8 Peripheral 124 Deep olive green 5.0GY2.0/8.0 Peripheral 125 Moderate olive green 5.0GY3.5/5.2 Interior 126 Dark olive green 5.0GY1.8/3.7 Peripheral 127 Grayish olive green 5.0GY3.5/2.2 Interior 128 Dark grayish olive green 5.0GY2.0/2.0 Interior 129 Vivid yellowish green 0.5G7/15.5 Peripheral 130 Brilliant yellowish green 0.5G8.0/9.1 Peripheral 131 Strong yellowish green 0.5G5.5/9.1 Interior 132 Deep yellowish green 0.5G3.5/11.5 Peripheral 133 Very deep yellowish green 0.5G2.0/9.2 Peripheral 134 Very light yellowish green 0.5G9.1/5.1 Peripheral 135 Light yellowish green 0.5G7.5/5.1 Interior 136 Moderate yellowish green 0.5G5.5/5.1 Interior 137 Dark yellowish green 0.5G3.5/5.1 Interior 138 Very dark yellowish green 0.5G1.5/4.9 Peripheral 139 Vivid green 6.5G5.2/18 Peripheral 140 Brilliant green 6.0G7.4/9.1 Peripheral 141 Strong green 6.0G4.5/9.1 Interior 142 Deep green 6.0G2.3/9.1 Peripheral 143 Very light green 6.0G8.6/5.1 Peripheral 144 Light green 6.0G6.5/5.1 Interior 145 Moderate green 6.0G4.5/5.1 Interior 146 Dark green 6.0G2.7/5.0 Interior 147 Very dark green 6.0G1.3/4.9 Peripheral 148 Very pale green 9.0G8.7/1.8 Peripheral 149 Pale green 9.0G6.5/1.8 Interior 150 Grayish green 9.0G4.5/1.8 Interior 151 Dark grayish green 9.0G2.8/1.6 Interior 152 Blackish green 9.0G1.1/1.4 Peripheral 153 Greenish white 7.0G9.2/0.8 Peripheral 154 Light greenish gray 7.0G7.5/0.8 Interior 155 Greenish gray 7.0G5.5/0.8 Interior 156 Dark greenish gray 7.0G3.5/0.8 Interior 157 Greenish black 7.5G0.9/0.7 Peripheral 158 Vivid bluish green 4.5BG5.3/15.5 Peripheral 159 Brilliant bluish green 4.5BG7.3/9.0 Peripheral 160 Strong bluish green 4.5BG4.5/9.0 Interior 161 Deep bluish green 4.5BG2.3/9.0 Peripheral 162 Very light bluish green 4.5BG8.5/5.0 Peripheral 163 Light bluish green 4.5BG6.5/5.0 Interior 164 Moderate bluish green 4.5BG4.5/5.0 Interior 165 Dark bluish green 4.5BG2.7/5.0 Interior 166 Very dark bluish green 4.5BG1.3/4.9 Peripheral 167 Vivid greenish blue 4.5B5.2/13 Peripheral 168 Brilliant greenish blue 4.5B6.8/9.0 Peripheral 169 Strong greenish blue 4.5B4.5/9.0 Interior 170 Deep greenish blue 4.5B2.5/9.0 Peripheral 171 Very light greenish blue 4.5B8.2/5.2 Peripheral 172 Light greenish blue 4.5B6.5/5.2 Interior 173 Moderate greenish blue 4.5B4.5/5.2 Interior 174 Dark greenish blue 4.5B2.7/5.0 Interior 175 Very dark greenish blue 4.5B1.3/4.9 Peripheral 176 Vivid blue 3.0PB4.2/15 Peripheral 177 Brilliant blue 3.0PB6.4/11.0 Peripheral 178 Strong blue 3.0PB4.2/11.0 Interior 179 Deep blue 3.0PB2.0/9.0 Peripheral 180 Very light blue 2.4PB8.2/7.2 Peripheral 181 Light blue 2.7PB6.5/7.3 Interior 182 Moderate blue 2.9PB4.2/7.2 Interior 183 Dark blue 2.8PB1.7/5.0 Peripheral 184 Very pale blue 0.9PB8.4/3.0 Peripheral 185 Pale blue 0.9PB6.5/3.0 Interior 186 Grayish blue 0.9PB4.2/3.0 Interior 187 Dark grayish blue 9.5B2.6/1.9 Interior 188 Blackish blue 9.5B1.1/1.5 Peripheral 189 Bluish white 9.5B9.1/1.0 Peripheral 190 Light bluish gray 9.5B7.5/1.0 Interior 191 Bluish gray 9.5B5.5/1.0 Interior 192 Dark bluish gray 9.5B3.5/1.0 Interior 193 Bluish black 9.5B1.0/0.7 Peripheral 194 Vivid purplish blue 8.0PB2.5/22 Peripheral 195 Brilliant purplish blue 8.0PB6.0/10.8 Peripheral 196 Strong purplish blue 8.0PB4.1/11.4 Interior 197 Deep purplish blue 8.0PB1.6/9.1 Peripheral 198 Very light purplish blue 7PB7.8/6.1 Peripheral 199 Light purplish blue 7.5PB6.0/6.8 Interior 200 Moderate purplish blue 8.0PB3.5/6.9 Interior 201 Dark purplish blue 7.9PB1.1/4.7 Peripheral 202 Very pale purplish blue 7.0PB8.2/4.1 Peripheral 203 Pale purplish blue 7.0PB6.0/4.1 Interior 204 Grayish purplish blue 7.2PB3.3/4.0 Interior 205 Vivid violet 1.0P2.7/21 Peripheral 206 Brilliant violet 1.0P5.9/11.1 Peripheral 207 Strong violet 1.0P3.5/11.1 Interior 208 Deep violet 1.0P1.4/10.3 Peripheral 209 Very light violet 1.0P7.9/7 Peripheral 210 Light violet 1.0P6.0/7.2 Interior 211 Moderate violet 1.0P3.5/7.2 Interior 212 Dark violet 1.0P1.3/5.0 Peripheral 213 Very pale violet 1.0P8.2/4.1 Peripheral 214 Pale violet 1.0P6.0/4.1 Interior 215 Grayish violet 1.0P3.3/4.1 Interior 216 Vivid purple 6.0P3.5/20 Peripheral 217 Brilliant purple 6.0P6.7/11.1 Peripheral 218 Strong purple 6.0P4.5/11.1 Interior 219 Deep purple 6.0P2.8/10.2 Interior 220 Very deep purple 6.0P1.2/10.2 Peripheral 221 Very light purple 6.0P8.0/7.2 Peripheral 222 Light purple 6.0P6.5/7.2 Interior 223 Moderate purple 6.0P4.5/7.2 Interior 224 Dark purple 6.0P2.7/5.1 Interior 225 Very dark purple 6.0P1.1/4.9 Peripheral 226 Very pale purple 5.4P8.4/3.3 Peripheral 227 Pale purple 6.8P6.4/3.0 Interior 228 Grayish purple 7.8P4.5/2.9 Interior 229 Dark grayish purple 10.0P2.8/2.0 Interior 230 Blackish purple 10.0P1.0/1.4 Peripheral 231 Purplish white 9.0P9.1/1.0 Peripheral 232 Light purplish gray 9.0P7.5/1.0 Interior 233 Purplish gray 10.0P5.5/1.0 Interior 234 Dark purplish gray 10.0P3.5/1.0 Interior 235 Purplish black 10.0P1.0/0.7 Peripheral 236 Vivid reddish purple 1.0RP4/19 Peripheral 237 Strong reddish purple 1.0RP4.5/11.1 Interior 238 Deep reddish purple 1.0RP2.8/10.3 Interior 239 Very deep reddish purple 1.0RP1.3/10.3 Peripheral 240 Light reddish purple 1.0RP6.0/7.2 Interior 241 Moderate reddish purple 1.0RP4.5/7.2 Interior 242 Dark reddish purple 1.0RP2.7/5.1 Interior 243 Very dark reddish purple 1.0RP1.1/5.0 Peripheral 244 Pale reddish purple 1.0RP6.0/4.1 Interior 245 Grayish reddish purple 1.0RP4.5/4.1 Interior 246 Brilliant purplish pink 4.0RP7.9/11 Peripheral 247 Strong purplish pink 4.0RP7/14.5 Peripheral 248 Deep purplish pink 4.0RP6.0/12.0 Interior 249 Light purplish pink 4.0RP8.3/7.1 Peripheral 250 Moderate purplish pink 4.0RP7.0/7.1 Interior 251 Dark purplish pink 6.0RP6.0/7.2 Interior 252 Pale purplish pink 4.0RP8.5/3.5 Peripheral 253 Grayish purplish pink 4.0RP7.0/3.5 Interior 254 Vivid purplish red 7.0RP4/17 Peripheral 255 Strong purplish red 7.0RP4.5/11.9 Interior 256 Deep purplish red 7.0RP2.8/11.0 Interior 257 Very deep purplish red 7.0RP1.3/9.0 Peripheral 258 Moderate purplish red 7.0RP4.5/9.0 Interior 259 Dark purplish red 7.0RP2.7/6.3 Interior 260 Very dark purplish red 7.0RP1.2/4.9 Peripheral 261 Light grayish purplish red 7.0RP6.0/4.0 Interior 262 Grayish purplish red 7.0RP4.5/5.2 Interior 263 White 3.0Y9.25/0.06 Interior 264 Light gray 3.0Y7.5/0.06 Interior 265 Medium gray 3.0Y5.5/0.06 Interior 266 Dark gray N3.5 Interior 267 Black N1.25 Interior