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Reference Values of Gems
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Gemstone color grading system for the Web

The Gemval color grading system is a simplified modification of the Gemological Institute of America (GIA) color grading standards for natural gemstones. color grading standards for natural gemstones. Unlike GIA's standard color set, the Gemval web color system is designed to fit a 32-bit LCD computer monitor precisely and specifically to enable color recognition via a web interface.

This color grade method represents the core of Gemval's online appraisal system. It consists of 230 color patterns, 25 base hue sets and 1 grey scale. Additionally it is extended by 6 tones (very light, light, medium light, medium, medium dark and dark) and by 3 saturation grades (strong, very slightly greyish/brown and slightly greyish/brown).

Red
001 002 003 004 005 006 007 008 009 010 011 012
orangey Red

013 014 015 016 017 018
reddish Orange
019 020 021 022 023 024 025 026 027 028 029 030
Orange

031 032 033 034 035 036
orangey Yellow

037 038 039 040 041 042
Yellow
043 044 045 046 047 048 049 050 051 052 053 054
greenish Yellow

055 056 057 058 059 060
yellowish Green
061 062 063 064 065 066 067 068 069 070 071 072
slightly yellowish Green

073 074 075 076 077 078
Green
079 080 081 082 083 084 085 086 087 088 089 090
bluish Green
091 092 093 094 095 096 097 098 099 100 101 102
light bluish Green

103 104 105 106 107 108
very strongly bluish Green
109 110 111 112 113 114 115 116 117 118 119 120
Green-Blue or Blue-Green

121 122 123 124 125 126
very strongly greenish Blue
127 128 129 130 131 132 133 134 135 136 137 138
slightly greenish Blue

139 140 141 142 143 144
Blue
145 146 147 148 149 150 151 152 153 154 155 156
violetish Blue

157 158 159 160 161 162
bluish Violet
>
163 164 165 166 167 168 169 170 171 172 173 174
Violet

175 176 177 178 179 180
bluish Purple

181 182 183 184 185 186
Purple
187 188 189 190 191 192 193 194 195 196 197 198
reddish Purple

199 200 201 202 203 204
strongly purplish Red
205 206 207 208 209 210 211 212 213 214 215 216
slightly purplish Red

217 218 219 220 221 222
Grey

223 224 225 226 227 228 229 230

 


Reference color descriptions and RGB codes

001 - very light Red (web RGB code: ffeaea)
002 - light Red; strong (web RGB code: feabab)
003 - light Red; very slightly brownish (web RGB code: f1b8b8)
004 - medium light Red; strong (web RGB code: fc5858)
005 - medium light Red; very slightly brownish (web RGB code: e47070)
006 - medium light Red; slightly brownish (web RGB code: ce8686)
007 - medium Red; strong (web RGB code: fb0404)
008 - medium Red; very slightly brownish (web RGB code: d72828)
009 - medium Red; slightly brownish (web RGB code: b54a4a)
010 - medium dark Red; strong (web RGB code: a70303)
011 - medium dark Red; very slightly brownish (web RGB code: 8d1d1d)
012 - dark Red (web RGB code: 540101)
013 - light orangey Red; strong (web RGB code: fec4ab)
014 - medium light orangey Red; strong (web RGB code: fc8958)
015 - medium light orangey Red; very slightly brownish (web RGB code: e49370)
016 - medium orangey Red; strong (web RGB code: fb4f04)
017 - medium orangey Red; very slightly brownish (web RGB code: d85c27)
018 - medium dark orangey Red; strong (web RGB code: a73403)
019 - very light reddish Orange (web RGB code: fff4ea)
020 - light reddish Orange; strong (web RGB code: fed5ab)
021 - light reddish Orange; very slightly brownish (web RGB code: f2d7bb)
022 - medium light reddish Orange; strong (web RGB code: fcaa58)
023 - medium light reddish Orange; very slightly brownish (web RGB code: e4aa70)
024 - medium light reddish Orange; slightly brownish (web RGB code: ceaa86)
025 - medium reddish Orange; strong (web RGB code: fb8004)
026 - medium reddish Orange; very slightly brownish (web RGB code: d88027)
027 - medium reddish Orange; slightly brownish (web RGB code: b68049)
028 - medium dark reddish Orange; strong (web RGB code: a75503)
029 - medium dark reddish Orange; very slightly brownish (web RGB code: 8d551d)
030 - dark reddish Orange (web RGB code: 542b01)
031 - light Orange; strong (web RGB code: fee6ab)
032 - medium light Orange; strong (web RGB code: fccb58)
033 - medium light Orange; very slightly brownish (web RGB code: e4c170)
034 - medium Orange; strong (web RGB code: fbb004)
035 - medium Orange; very slightly brownish (web RGB code: d8a327)
036 - medium dark Orange; strong (web RGB code: a77603)
037 - light orangey Yellow; strong (web RGB code: fef5ab)
038 - medium light orangey Yellow; strong (web RGB code: fcec58)
039 - medium light orangey Yellow; very slightly brownish (web RGB code: e4d970)
040 - medium orangey Yellow; strong (web RGB code: fbe204)
041 - medium orangey Yellow; very slightly brownish (web RGB code: d8c627)
042 - medium dark orangey Yellow; strong (web RGB code: a79703)
043 - very light Yellow (web RGB code: ffffe1)
044 - light Yellow; strong (web RGB code: fefeab)
045 - light Yellow; very slightly brownish (web RGB code: f1f1b8)
046 - medium light Yellow; strong (web RGB code: fcfc58)
047 - medium light Yellow; very slightly brownish (web RGB code: e4e470)
048 - medium light Yellow; slightly brownish (web RGB code: cece86)
049 - medium Yellow; strong (web RGB code: fbfb04)
050 - medium Yellow; very slightly brownish (web RGB code: d8d827)
051 - medium Yellow; slightly brownish (web RGB code: b6b649)
052 - medium dark Yellow; strong (web RGB code: a7a703)
053 - medium dark Yellow; very slightly brownish (web RGB code: 8d8d1d)
054 - dark Yellow (web RGB code: 545401)
055 - light greenish Yellow; strong (web RGB code: f5feab)
056 - medium light greenish Yellow; strong (web RGB code: ecfc58)
057 - medium light greenish Yellow; very slightly greyish (web RGB code: d9e470)
058 - medium greenish Yellow; strong (web RGB code: e2fb04)
059 - medium greenish Yellow; very slightly greyish (web RGB code: c6d827)
060 - medium dark greenish Yellow; strong (web RGB code: 97a703)
061 - very light yellowish Green (web RGB code: f8ffe1)
062 - light yellowish Green; strong (web RGB code: eafeab)
063 - light yellowish Green; very slightly greyish (web RGB code: e3f1b8)
064 - medium light yellowish Green; strong (web RGB code: d3fc58)
065 - medium light yellowish Green; very slightly greyish (web RGB code: c8e470)
066 - medium light yellowish Green; slightly greyish (web RGB code: bcce86)
067 - medium yellowish Green; strong (web RGB code: bdfb04)
068 - medium yellowish Green; very slightly greyish (web RGB code: acd827)
069 - medium yellowish Green; slightly greyish (web RGB code: 9bb649)
070 - medium dark yellowish Green; strong (web RGB code: 7ea703)
071 - medium dark yellowish Green; very slightly greyish (web RGB code: 728d1d)
072 - dark yellowish Green (web RGB code: 405401)
073 - light slightly yellowish Green; strong (web RGB code: d5feab)
074 - medium light slightly yellowish Green; strong (web RGB code: aafc58)
075 - medium light slightly yellowish Green; very slightly greyish (web RGB code: aae470)
076 - medium slightly yellowish Green; strong (web RGB code: 80fb04)
077 - medium slightly yellowish Green; very slightly greyish (web RGB code: 80d827)
078 - medium dark slightly yellowish Green; strong (web RGB code: 55a703)
079 - very light Green (web RGB code: eaffea)
080 - light Green; strong (web RGB code: abfeab)
081 - light Green; very slightly greyish (web RGB code: b8f1b8)
082 - medium light Green; strong (web RGB code: 58fc58)
083 - medium light Green; very slightly greyish (web RGB code: 70e470)
084 - medium light Green; slightly greyish (web RGB code: 86ce86)
085 - medium Green; strong (web RGB code: 04fb04)
086 - medium Green; very slightly greyish (web RGB code: 27d827)
087 - medium Green; slightly greyish (web RGB code: 49b649)
088 - medium dark Green; strong (web RGB code: 03a703)
089 - medium dark Green; very slightly greyish (web RGB code: 1d8d1d)
090 - dark Green (web RGB code: 015401)
091 - very light very slightly bluish Green (web RGB code: eafff4)
092 - light very slightly bluish Green; strong (web RGB code: abfed5)
093 - light very slightly bluish Green; very slightly greyish (web RGB code: b8f1d5)
094 - medium light very slightly bluish Green; strong (web RGB code: 58fcaa)
095 - medium light very slightly bluish Green; very slightly greyish (web RGB code: 70e4aa)
096 - medium light very slightly bluish Green; slightly greyish (web RGB code: 86ceaa)
097 - medium very slightly bluish Green; strong (web RGB code: 04fb80)
098 - medium very slightly bluish Green; very slightly greyish (web RGB code: 27d880)
099 - medium very slightly bluish Green; slightly greyish (web RGB code: 49b680)
100 - medium dark very slightly bluish Green; strong (web RGB code: 03a755)
101 - medium dark very slightly bluish Green; very slightly greyish (web RGB code: 1d8d55)
102 - dark very slightly bluish Green (web RGB code: 01542b)
103 - light bluish Green; strong (web RGB code: abfeed)
104 - medium light bluish Green; strong (web RGB code: 58fcdb)
105 - medium light bluish Green; very slightly greyish (web RGB code: 70e4cd)
106 - medium bluish Green; strong (web RGB code: 04fbca)
107 - medium bluish Green; very slightly greyish (web RGB code: 27d8b5)
108 - medium dark bluish Green; strong (web RGB code: 03a786)
109 - very light very strongly bluish Green (web RGB code: eaffff)
110 - light very strongly bluish Green; strong (web RGB code: abfefe)
111 - light very strongly bluish Green; very slightly greyish (web RGB code: b8f1f1)
112 - medium light very strongly bluish Green; strong (web RGB code: 58fcfc)
113 - medium light very strongly bluish Green; very slightly greyish (web RGB code: 70e4e4)
114 - medium light very strongly bluish Green; slightly greyish (web RGB code: 86cece)
115 - medium very strongly bluish Green; strong (web RGB code: 04fbfb)
116 - medium very strongly bluish Green; very slightly greyish (web RGB code: 27d8d8)
117 - medium very strongly bluish Green; slightly greyish (web RGB code: 49b6b6)
118 - medium dark very strongly bluish Green; strong (web RGB code: 03a7a7)
119 - medium dark very strongly bluish Green; very slightly greyish (web RGB code: 1d8d8d)
120 - dark very strongly bluish Green (web RGB code: 015454)
121 - light Green-Blue or Blue-Green; strong (web RGB code: abf1fe)
122 - medium light Green-Blue or Blue-Green; strong (web RGB code: 58e3fc)
123 - medium light Green-Blue or Blue-Green; very slightly greyish (web RGB code: 70d3e4)
124 - medium Green-Blue or Blue-Green; strong (web RGB code: 04d6fb)
125 - medium Green-Blue or Blue-Green; very slightly greyish (web RGB code: 27bdd8)
126 - medium dark Green-Blue or Blue-Green; strong (web RGB code: 038ea7)
127 - very light very strongly greenish Blue (web RGB code: eaf7ff)
128 - light very strongly greenish Blue; strong (web RGB code: abddfe)
129 - light very strongly greenish Blue; very slightly greyish (web RGB code: b8daf1)
130 - medium light very strongly greenish Blue; strong (web RGB code: 58bafc)
131 - medium light very strongly greenish Blue; very slightly greyish (web RGB code: 70b6e4)
132 - medium light very strongly greenish Blue; slightly greyish (web RGB code: 86b1ce)
133 - medium very strongly greenish Blue; strong (web RGB code: 0498fb)
134 - medium very strongly greenish Blue; very slightly greyish (web RGB code: 2792d8)
135 - medium very strongly greenish Blue; slightly greyish (web RGB code: 498ab6)
136 - medium dark very strongly greenish Blue; strong (web RGB code: 0365a7)
137 - medium dark very strongly greenish Blue; very slightly greyish (web RGB code: 1d618d)
138 - dark very strongly greenish Blue (web RGB code: 013354)
139 - light very slightly greenish Blue; strong (web RGB code: abc4fe)
140 - medium light very slightly greenish Blue; strong (web RGB code: 5889fc)
141 - medium light very slightly greenish Blue; very slightly greyish (web RGB code: 7093e4)
142 - medium very slightly greenish Blue; strong (web RGB code: 044ffb)
143 - medium very slightly greenish Blue; very slightly greyish (web RGB code: 275cd8)
144 - medium dark very slightly greenish Blue; strong (web RGB code: 0334a7)
145 - very light Blue (web RGB code: eaeaff)
146 - light Blue; strong (web RGB code: ababfe)
147 - light Blue; very slightly greyish (web RGB code: b8b8f1)
148 - medium light Blue; strong (web RGB code: 5858fc)
149 - medium light Blue; very slightly greyish (web RGB code: 7070e4)
150 - medium light Blue; slightly greyish (web RGB code: 8686ce)
151 - medium Blue; strong (web RGB code: 0404fb)
152 - medium Blue; very slightly greyish (web RGB code: 2727d8)
153 - medium Blue; slightly greyish (web RGB code: 4949b6)
154 - medium dark Blue; strong (web RGB code: 0303a7)
155 - medium dark Blue; very slightly greyish (web RGB code: 1d1d8d)
156 - dark Blue (web RGB code: 010154)
157 - light violetish Blue; strong (web RGB code: ccabfe)
158 - medium light violetish Blue; strong (web RGB code: 9a58fc)
159 - medium light violetish Blue; very slightly greyish (web RGB code: 9e70e4)
160 - medium violetish Blue; strong (web RGB code: 6704fb)
161 - medium violetish Blue; very slightly greyish (web RGB code: 6d26d9)
162 - medium dark violetish Blue; strong (web RGB code: 4503a7)
163 - very light bluish Violet (web RGB code: f8eaff)
164 - light bluish Violet; strong (web RGB code: e1abfe)
165 - light bluish Violet; very slightly greyish (web RGB code: ddb8f1)
166 - medium light bluish Violet; strong (web RGB code: c258fc)
167 - medium light bluish Violet; very slightly greyish (web RGB code: bc70e4)
168 - medium light bluish Violet; slightly greyish (web RGB code: b586ce)
169 - medium bluish Violet; strong (web RGB code: a504fb)
170 - medium bluish Violet; very slightly greyish (web RGB code: 9a27d8)
171 - medium bluish Violet; slightly greyish (web RGB code: 8f49b6)
172 - medium dark bluish Violet; strong (web RGB code: 6d03a7)
173 - medium dark bluish Violet; very slightly greyish (web RGB code: 661d8d)
174 - dark bluish Violet (web RGB code: 370154)
175 - light Violet; strong (web RGB code: edabfe)
176 - medium light Violet; strong (web RGB code: db58fc)
177 - medium light Violet; very slightly greyish (web RGB code: cd70e4)
178 - medium Violet; strong (web RGB code: ca04fb)
179 - medium Violet; very slightly greyish (web RGB code: b527d8)
180 - medium dark Violet; strong (web RGB code: 8603a7)
181 - light bluish Purple; strong (web RGB code: faabfe)
182 - medium light bluish Purple; strong (web RGB code: f358fc)
183 - medium light bluish Purple; very slightly greyish (web RGB code: df70e4)
184 - medium bluish Purple; strong (web RGB code: ee04fb)
185 - medium bluish Purple; very slightly greyish (web RGB code: cf27d8)
186 - medium dark bluish Purple; strong (web RGB code: 9e03a7)
187 - very light Purple (web RGB code: ffeafd)
188 - light Purple; strong (web RGB code: feabf5)
189 - light Purple; very slightly greyish (web RGB code: f1b8ec)
190 - medium light Purple; strong (web RGB code: fc58ec)
191 - medium light Purple; very slightly greyish (web RGB code: e470d9)
192 - medium light Purple; slightly greyish (web RGB code: ce86c7)
193 - medium Purple; strong (web RGB code: fb04e2)
194 - medium Purple; very slightly greyish (web RGB code: d827c6)
195 - medium Purple; slightly greyish (web RGB code: b649ab)
196 - medium dark Purple; strong (web RGB code: a70397)
197 - medium dark Purple; very slightly greyish (web RGB code: 8d1d82)
198 - dark Purple (web RGB code: 54014b)
199 - light reddish Purple; strong (web RGB code: feabe1)
200 - medium light reddish Purple; strong (web RGB code: fc58c2)
201 - medium light reddish Purple; very slightly brownish (web RGB code: e470bc)
202 - medium reddish Purple; strong (web RGB code: fb04a5)
203 - medium reddish Purple; very slightly brownish (web RGB code: d8279a)
204 - medium dark reddish Purple; strong (web RGB code: a7036d)
205 - very light strongly purplish Red (web RGB code: ffeaf3)
206 - light strongly purplish Red; strong (web RGB code: feabd0)
207 - light strongly purplish Red; very slightly brownish (web RGB code: f1b8d1)
208 - medium light strongly purplish Red; strong (web RGB code: fc58a2)
209 - medium light strongly purplish Red; very slightly brownish (web RGB code: e470a5)
210 - medium light strongly purplish Red; slightly brownish (web RGB code: ce86a7)
211 - medium strongly purplish Red; strong (web RGB code: fb0473)
212 - medium strongly purplish Red; very slightly brownish (web RGB code: d82777)
213 - medium strongly purplish Red; slightly brownish (web RGB code: b6497a)
214 - medium dark strongly purplish Red; strong (web RGB code: a7034d)
215 - medium dark strongly purplish Red; very slightly brownish (web RGB code: 8d1d50)
216 - dark strongly purplish Red (web RGB code: 540126)
217 - light slightly purplish Red; strong (web RGB code: feabc0)
218 - medium light slightly purplish Red; strong (web RGB code: fc5882)
219 - medium light slightly purplish Red; very slightly brownish (web RGB code: e4708d)
220 - medium slightly purplish Red; strong (web RGB code: fb0442)
221 - medium slightly purplish Red; very slightly brownish (web RGB code: d82754)
222 - medium dark slightly purplish Red; strong (web RGB code: a7032d)
223 - Colorless (web RGB code: ffffff)
224 - very light Grey (web RGB code: f4f4f4)
225 - light Grey (web RGB code: d4d4d4)
226 - medium light Grey (web RGB code: aaaaaa)
227 - Grey (web RGB code: 7f7f7f)
228 - medium dark Grey (web RGB code: 555555)
229 - dark Grey (web RGB code: 2a2a2a)
230 - Black (web RGB code: 000000)

 

 
 
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