Question of art and science. I've sampled, scanned all Polychromos pencils (and yes others have pointed the folly of such attempt in terms of color veracity, I still found it and interesting experiment).
Result is below. Mathematically it's correct for hue and saturation. Value element isn't included which results in some interesting artefacts in placement of cold/warm greys. Any thoughts where/how you'd place them?
101 White (RGB): #f5f7fb
102 Creat (RGB): #f2f3b9
103 Ivort (RGB): #f2f4e6
104 Light Yellow Glaze (RGB): #feff5b
105 Light Cadmium Yellow (RGB): #fefd5c
106 Light Chrome Yellow (RGB): #fdf861
107 Cadmium Yellow (RGB): #fef638
108 Dark Cadmium Yellow (RGB): #f2b821
109 Dark Chrome Yellow (RGB): #e9a041
110 Phthalo Blue (RGB): #128de4
111 Cadmium Orange (RGB): #e7884c
112 Leaf Green (RGB): #17c743
113 Orange Glaze (RGB): #ea5749
115 Dark Cadmium Orange (RGB): #ea584a
117 Light Cadmium red (RGB): #eb4e57
118 Scarlet Red (RGB): #e03d5b
119 Light Magenta (RGB): #df9ce4
120 Ultramarine (RGB): #5d81ee
121 Pale Geranium Lake (RGB): #e4335a
123 Fuchsia (RGB): #db439f
124 Rose Carmine (RGB): #e25c8a
125 Middle Purple Pink (RGB): #d13da6
126 Permanent Carmine (RGB): #d42758
127 Pink Carmine (RGB): #dd4584
128 Light Purple Pink (RGB): #e05bb1
129 Pink Madder Lake (RGB): #e37ec2
130 Dark Flesh (RGB): #e684a5
131 Medium Flesh (RGB): #dd7b89
132 Light Flesh (RGB): #e5bbb2
133 Magenta (RGB): #aa4069
134 Crimson (RGB): #b85bba
135 Light Red-Violet (RGB): #a358a9
136 Purple Violet (RGB): #7f4cc6
137 Blue Violet (RGB): #6345c5
138 Violet (RGB): #9f6dd8
140 Light Ultramarine (RGB): #86adf8
141 Delft Blue (RGB): #4835aa
142 Madder (RGB): #ce4f77
143 Cobalt Blue (RGB): #0a7dd5
144 Cobalt Blue-Greenish (RGB): #0b70cb
145 Light Phthalo Blue (RGB): #68bcf8
146 Smalt Blue (RGB): #87b1f8
149 Bluish Turquoise (RGB): #077dc0
151 Helioblue-Reddish (RGB): #2579d4
152 Middle Phthalo Blue (RGB): #0a91e7
153 Cobalt Turquoise (RGB): #078eb0
154 Light Cobalt Turquoise (RGB): #69d1e9
155 Helio Turquoise (RGB): #0d7f92
156 Cobalt Green (RGB): #23bdc9
157 Dark Indigo (RGB): #3c4b65
158 Deep Cobalt Green (RGB): #177f71
159 Hooker's Green (RGB): #2c9d68
160 Manganese Violet (RGB): #9954b8
161 Phthalo Green (RGB): #01ae8b
162 Light Phthalo Green (RGB): #1ad396
163 Emerald Green (RGB): #0cc98b
165 Juniper Green (RGB): #43865f
166 Grass Green (RGB): #6ad94e
167 Permanent Green Olive (RGB): #67983b
168 Earth Green Yellowish (RGB): #a6c565
169 Caput Mortuum (RGB): #8c5156
170 May Green (RGB): #bedb62
171 Light Green (RGB): #9fe56a
172 Earth Green (RGB): #879f85
173 Olive Green Yellowish (RGB): #71724a
174 Chrome Green Opaque (RGB): #738454
175 Sepia (RGB): #5d5556
176 Van Dyck Brown (RGB): #765e5b
177 Walnut Brown (RGB): #655051
178 Nougat (RGB): #947362
179 Bistre (RGB): #8f6745
180 Raw Umber (RGB): #a1713f
181 Payne's Gray (RGB): #5f6168
182 Brown Ochre (RGB): #af7a42
183 Light Yellow Ochre (RGB): #e0b536
184 Dark Naples Ochre (RGB): #f9e065
185 Naples Yellow (RGB): #fdee5e
186 Terracotta (RGB): #d69f6a
187 Burnt Ochre (RGB): #c6864f
188 Sanguine (RGB): #c55948
189 Cinnamon (RGB): #d59992
190 Venetian Red (RGB): #cb6361
191 Pompeian Red (RGB): #d35e70
192 Indian Red (RGB): #a54851
193 Burnt Carmine (RGB): #a24e6b
194 Red-Violet (RGB): #904a6a
199 Black (RGB): #4d4c51
205 Cadmium Yellow Lemon (RGB): #f6fe4c
217 Middle Cadmium Red (RGB): #c14149
219 Deep Scarlet Red (RGB): #d92c56
223 Deep Red (RGB): #de4f64
225 Dark Red (RGB): #b03d4c
226 Alizarin Crimson (RGB): #d42e64
230 Cold Gray I (RGB): #d4dbe5
231 Cold Gray II (RGB): #c8cfd8
232 Cold Gray III (RGB): #a0a8b2
233 Cold Gray IV (RGB): #97989d
234 Cold Gray U (RGB): #8d8f95
235 Cold Gray VI (RGB): #5d5e62
246 Prussian Blue (RGB): #216da6
247 Indanthrene Blue (RGB): #354491
249 Mauve (RGB): #6f49c2
250 Gold (RGB): #aba99f
251 Silver (RGB): #b4bbc9
252 Copper (RGB): #9e968f
263 Caput Mortuum Violet (RGB): #83515a
264 Dark Phthalo Green (RGB): #06a474
266 Permanent Green (RGB): #0b9a3c
267 Pine Green (RGB): #286d40
268 Green Gold (RGB): #c7a539
270 Warm Gray I (RGB): #d3d4d6
271 Warm Gray II (RGB): #c7c7c7
272 Warm Gray III (RGB): #a9a8a8
273 Warm Gray IV (RGB): #7d7b7c
274 Warm Gray V (RGB): #5c5a5d
275 Warm Gray VI (RGB): #444346
276 Chrome Oxide Green Fiery (RGB): #01a07c
278 Chrome Oxide Green (RGB): #395d43
280 Burnt Umber (RGB): #75554a
283 Burnt Sienna (RGB): #8d6356
