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	5RP	5P	5PB	5B	5BG	5G	5GY	5Y	5YR
9	254 221 217	248 222 229	237 223 253	217 229 249	181 238 252	73 254 233	113 254 190	152 252 136	240 235 16	255 222 197
8	252 184 177	252 181 204	225 185 255	167 203 255	81 218 255	56 223 207	46 228 161	65 229 134	58 233 59	254 187 133
7	253 143 136	255 137 182	213 147 253	124 176 248	37 189 225	57 193 181	43 197 140	119 195 43	194 177 13	253 149 39
6	253 95 95	252 86 163	206 102 253	52 150 251	30 160 192	47 164 155	32 167 120	102 165 49	173 147 41	217 125 27
5	244 8 60	231 28 142	198 30 248	38 124 211	28 132 160	45 135 129	10 139 98	49 141 52	154 118 23	183 101 14
4	191 26 52	184 20 117	160 17 198	5 98 176	18 105 129	33 107 104	34 109 80	61 110 28	122 94 33	146 80 21
3	143 24 45	138 19 92	122 8 150	22 74 132	31 79 95	28 81 80	28 83 62	10 87 31	95 71 6	111 60 21
2	102 13 41	98 11 71	87 10 106	18 52 95	10 57 71	8 58 58	25 58 45	15 60 28	59 52 10	83 41 10

Uncalibrated neutral (gray) values

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

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+