Munsell

Albert Munsell, Color Notation 1905

Munsell's color notation was the first to arrange the color perception components—hue, value, and chroma—into a three-dimensional arrangement. There 10 hues in Munsell's notation: R, YR, Y, GY, G, BG, B, PB, P, RP. Value ranges from 0 (black) to 10 (white). Chroma ranges from 0 (gray) to 30+. The hue is specified first, followed by value/chroma; e.g., 5R 3/4 is a red of value 3, chroma 4. There is a reasonable introduction to Munsell in the Wikipedia. Data for conversion from Munsell to CIE xyY can be found here. An online tool for exploring Munsell (unfortunately, Windows only) can be found here.

Uncalibrated Munsell to RGB conversion tables (gamma 2.2)

value/hue	5R	5YR	5Y	5GY	5G	5BG	5B	5PB	5P	5RP
9	254 221 217	255 222 197	253 228 111	205 244 46	113 254 190	73 254 233	181 238 252	217 229 249	237 223 253	248 222 229
8	252 184 177	254 187 133	231 199 34	176 215 8	46 228 161	56 223 207	81 218 255	167 203 255	225 185 255	252 181 204
7	253 143 136	253 149 39	202 172 23	151 187 12	43 197 140	57 193 181	37 189 225	124 176 248	213 147 253	255 137 182
6	253 95 95	217 125 27	173 145 17	128 158 36	32 167 120	47 164 155	30 160 192	52 150 251	206 102 253	252 86 163
5	244 8 60	183 101 14	143 120 34	104 131 29	10 139 98	45 135 129	28 132 160	38 124 211	198 30 248	231 28 142
4	191 26 52	146 80 21	114 95 27	82 105 23	34 109 80	33 107 104	18 105 129	5 98 176	160 17 198	184 20 117
3	143 24 45	111 60 21	87 72 23	61 80 19	28 83 62	28 81 80	31 79 95	22 74 132	122 8 150	138 19 92
2	102 13 41	83 41 10	63 51 11	42 57 12	25 58 45	8 58 58	10 57 71	18 52 95	87 10 106	98 11 71

Uncalibrated neutral values (gamma 2.2)

Neutral	RGB
N10	255 255 255
N9.5	243 243 243
N9	228 228 228
N8	200 200 200
N7	173 173 173
N6	147 147 147
N5	122 122 122
N4	97 97 97
N3	73 73 73
N2	52 52 52
N1	34 34 34
N0	0 0 0

= more useful colors (gamma 2.2)

value/hue	10PB	10GY	10Y
9	227 226 247	134 255 119	240 235 16
8	199 195 252	26 233 42	211 206 21
7	173 163 252	35 201 46	182 178 44
6	150 131 249	31 170 44	154 151 35
5	135 91 252	28 141 41	127 125 31
4	128 25 248	24 112 37	101 100 24
3	99 18 186	6 85 30	77 75 22
2	72 13 131	15 60 28	55 54 13

Hue, value, and chroma are all equal perceptual spacing!

5Y 8/10 and 5PB 4/20

Each hue goes from 0 to 10, e.g. 2.5RP; value goes from 0 to 10; and chroma goes from 0 to 30+