ColorChecker RGB Summaries, Spreadsheets and Lab TIFF File

Here are summaries of the ColorChecker RGB values for each of the reference RGB models. They were calculated with the ColorChecker Calculator. The tables are laid out in the same 6 x 4 array as the ColorChecker chart, and within each cell, the color components are shown in red, green, blue order from top to bottom.

Note that a few of the RGB components have negative values (shown in red below), meaning the color lies outside the gamut (at least the gamut defined by the bounds [0, 255]). Here is an illustration showing the sRGB color gamut in Lab color space. The 24 ColorChecker colors are plotted as spots. On the left you can see that the Cyan patch is out-of-gamut.

If you wish to compare your own RGB values (say from a digital camera picture of a ColorChecker chart) to each of the RGB models to see which is closest, I have prepared two Excel spreadsheets to perform these calculations for you. They are available as downloads in zip format. One spreadsheet does the comparison by converting the ideal Lab reference colors to RGB (using each of the RGB reference models as an assumed profile) and then compares these RGB values against your RGB values. The other spreadsheet converts your RGB values to Lab (using each of the RGB reference models as an assumed profile) and then compares these Lab values against the reference Lab values.

I have prepared a computer generated Lab TIFF file of the ColorChecker chart, using the Lab values obtained from the ColorChecker Calculator. It may be downloaded in either zip (16K) or sit (18K) format.

Adobe (1998) • Apple • BestRGB • Beta RGB • BruceRGB • CIE • ColorMatch • DonRGB4 • ECI v2 • Ekta Space PS5 • NTSC • PAL / SECAM • ProPhoto • SMPTE-C • sRGB • WideGamut

Adobe (1998)
106 81 67	182 149 130	103 122 154	95 108 69	129 128 174	133 189 170
194 121 48	79 91 162	170 85 97	84 62 105	167 186 73	213 162 57
54 62 149	101 148 76	152 48 58	228 199 55	164 83 144	63 134 163
242 241 236	200 200 199	159 160 159	122 121 120	84 84 84	53 53 53

Apple
94 62 49	179 132 110	77 104 140	72 90 48	110 109 163	90 179 154
203 100 22	56 71 151	176 62 79	71 43 89	146 176 37	220 145 22
34 43 137	63 134 49	156 25 42	232 189 -18	167 59 131	-24 117 150
239 239 232	189 189 189	144 144 144	103 103 102	65 66 66	37 37 37

BestRGB
105 85 69	181 154 133	105 121 151	94 105 73	131 130 170	135 181 172
191 134 64	84 93 157	169 103 99	85 68 102	164 181 90	209 169 78
61 66 144	101 140 84	152 75 62	224 201 85	165 102 141	74 126 161
242 241 237	200 200 199	159 160 159	121 121 120	84 84 84	53 53 53

Beta RGB
104 82 69	180 151 133	106 122 152	94 106 72	132 129 171	137 184 171
189 127 60	85 94 159	168 94 99	85 66 103	165 183 84	207 165 71
62 66 146	102 144 81	150 61 62	222 199 76	163 93 143	76 130 162
242 241 237	200 200 199	159 160 159	121 121 120	84 84 84	53 53 53

BruceRGB
111 81 67	189 149 130	98 122 154	91 108 69	129 128 173	115 189 170
207 121 49	76 91 162	184 85 97	89 62 105	162 186 74	223 162 58
52 62 149	86 148 76	167 48 58	234 199 56	177 83 144	13 134 163
242 241 236	200 200 199	159 160 159	122 121 120	84 84 84	53 53 53

CIE RGB
111 84 69	190 153 132	95 123 151	94 103 73	126 133 170	119 180 170
208 132 64	67 98 157	184 103 99	86 70 104	168 177 88	225 165 77
34 74 144	93 138 83	168 75 62	238 196 82	176 105 143	51 56 223
242 241 236	200 200 199	159 160 159	122 121 120	84 84 84	53 53 53

ColorMatch
93 62 48	179 131 110	78 104 140	71 90 48	113 108 162	93 178 156
200 101 17	59 71 151	176 60 78	72 44 88	144 176 38	217 147 17
38 43 137	62 134 51	157 21 41	229 189 -18	169 58 129	9 115 152
239 239 232	189 189 189	144 144 144	103 103 102	65 66 66	37 37 37

DonRGB4
105 83 69	181 152 133	105 122 151	94 106 73	131 130 170	135 183 172
191 129 62	84 94 157	169 96 98	85 66 102	164 182 88	209 166 75
61 67 145	100 143 83	152 65 61	224 199 81	165 96 141	73 129 162
242 241 237	200 200 199	159 160 159	121 121 120	84 84 84	53 53 53

ECI v2
114 88 72	190 160 142	113 130 162	101 118 73	141 135 182	145 195 179
199 136 57	89 94 170	179 94 108	92 63 113	174 196 81	216 176 67
60 56 158	109 159 81	162 50 65	229 210 67	174 89 154	76 139 172
244 244 239	207 207 207	169 169 169	131 131 130	90 90 90	53 52 53

Ekta Space PS5
106 82 69	183 151 133	105 123 152	92 105 72	133 131 171	129 183 171
195 127 60	86 96 159	174 95 99	88 68 103	160 180 84	211 164 71
64 71 146	93 142 81	157 64 62	224 197 76	170 97 143	68 131 162
242 241 237	200 200 199	159 160 159	121 121 120	84 84 84	53 53 53

NTSC
105 82 69	180 152 132	106 119 153	94 110 70	131 123 173	135 189 169
191 128 59	84 82 160	168 87 100	86 57 105	165 191 78	209 169 68
61 47 148	101 151 77	150 53 63	223 207 68	163 79 145	71 129 161
242 242 237	200 200 200	159 160 160	121 121 120	84 84 84	53 53 53

PAL / SECAM
113 81 66	192 149 129	95 122 155	89 108 66	129 128 176	105 189 169
213 121 40	74 91 165	190 85 98	91 62 107	160 186 59	227 162 43
51 62 152	78 148 69	172 48 59	236 199 21	182 83 147	-42 134 165
242 241 236	200 200 199	159 160 159	122 121 120	84 84 84	53 53 53

ProPhoto
81 66 52	160 138 116	95 102 134	74 86 56	119 111 155	128 167 157
163 116 48	78 74 140	142 85 80	68 51 83	143 168 73	184 155 61
59 49 126	84 123 67	122 57 45	202 191 69	142 84 123	76 108 145
238 238 233	189 189 189	144 144 144	103 103 102	65 66 66	37 37 37

SMPTE-C
116 80 67	196 149 129	91 122 155	88 109 67	128 127 175	90 190 169
221 119 44	71 90 164	198 81 98	93 60 107	158 188 64	234 161 49
47 59 151	65 150 71	181 40 59	241 200 38	190 78 146	-65 134 164
242 242 236	200 200 199	159 160 159	122 121 120	84 84 84	53 53 53

sRGB
115 80 64	195 151 130	94 123 156	88 108 65	130 129 177	100 190 171
217 122 37	72 91 165	194 84 98	91 59 107	160 188 60	230 163 42
46 60 153	71 150 69	177 44 56	238 200 27	187 82 148	-49 135 166
243 242 237	201 201 201	161 161 161	122 122 121	83 83 83	50 49 50

WideGamut
103 84 68	179 153 132	105 122 152	96 104 71	129 131 172	142 180 171
187 132 58	81 96 159	163 103 99	82 70 103	170 179 82	207 167 69
54 71 147	109 139 80	146 75 61	224 198 72	158 104 143	79 128 163
242 241 237	200 200 199	159 160 159	121 121 120	84 84 84	53 53 53