Gemstone color grading system for the Web

 Color description
 (GIA notation):		 very light

light;
strong

 light;
vs greyish
/brownish		 m light;
strong		 m light;
vs greyish
/brownish		 m light;
sl greyish
/brownish		 medium;
strong		 medium;
vs greyish
/brownish		 medium;
sl greyish
/brownish		 med dark;
strong		 med dark;
vs greyish
/brownish		 dark
 Red 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)
 orangey Red

n/a

 013 - light orangey Red; strong (web RGB code: fec4ab)

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 014 - medium light orangey Red; strong (web RGB code: fc8958) 015 - medium light orangey Red; very slightly brownish (web RGB code: e49370)

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 016 - medium orangey Red; strong (web RGB code: fb4f04) 017 - medium orangey Red; very slightly brownish (web RGB code: d85c27)

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 018 - medium dark orangey Red; strong (web RGB code: a73403)

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 reddish Orange 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)
 Orange

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 031 - light Orange; strong (web RGB code: fee6ab)

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 032 - medium light Orange; strong (web RGB code: fccb58) 033 - medium light Orange; very slightly brownish (web RGB code: e4c170)

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 034 - medium Orange; strong (web RGB code: fbb004) 035 - medium Orange; very slightly brownish (web RGB code: d8a327)

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 036 - medium dark Orange; strong (web RGB code: a77603)

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 orangey Yellow

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 037 - light orangey Yellow; strong (web RGB code: fef5ab)

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 038 - medium light orangey Yellow; strong (web RGB code: fcec58) 039 - medium light orangey Yellow; very slightly brownish (web RGB code: e4d970)

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 040 - medium orangey Yellow; strong (web RGB code: fbe204) 041 - medium orangey Yellow; very slightly brownish (web RGB code: d8c627)

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 042 - medium dark orangey Yellow; strong (web RGB code: a79703)

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 Yellow 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)
 greenish Yellow

n/a

 055 - light greenish Yellow; strong (web RGB code: f5feab)

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 056 - medium light greenish Yellow; strong (web RGB code: ecfc58) 057 - medium light greenish Yellow; very slightly greyish (web RGB code: d9e470)

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 058 - medium greenish Yellow; strong (web RGB code: e2fb04) 059 - medium greenish Yellow; very slightly greyish (web RGB code: c6d827)

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 060 - medium dark greenish Yellow; strong (web RGB code: 97a703)

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 yellowish Green 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)
 slightly yellowish Green

n/a

 073 - light slightly yellowish Green; strong (web RGB code: d5feab)

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 074 - medium light slightly yellowish Green; strong (web RGB code: aafc58) 075 - medium light slightly yellowish Green; very slightly greyish (web RGB code: aae470)

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 076 - medium slightly yellowish Green; strong (web RGB code: 80fb04) 077 - medium slightly yellowish Green; very slightly greyish (web RGB code: 80d827)

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 078 - medium dark slightly yellowish Green; strong (web RGB code: 55a703)

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 Green 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)
 very slightly bluish Green 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)
 bluish Green

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 103 - light bluish Green; strong (web RGB code: abfeed)

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 104 - medium light bluish Green; strong (web RGB code: 58fcdb) 105 - medium light bluish Green; very slightly greyish (web RGB code: 70e4cd)

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 106 - medium bluish Green; strong (web RGB code: 04fbca) 107 - medium bluish Green; very slightly greyish (web RGB code: 27d8b5)

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 108 - medium dark bluish Green; strong (web RGB code: 03a786)

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 very strongly bluish Green 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)
 Green-Blue or Blue-Green

n/a

 121 - light Green-Blue or Blue-Green; strong (web RGB code: abf1fe)

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 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)

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 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)

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 126 - medium dark Green-Blue or Blue-Green; strong (web RGB code: 038ea7)

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 very strongly greenish Blue 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)
 very slightly greenish Blue

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 139 - light very slightly greenish Blue; strong (web RGB code: abc4fe)

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 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)

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 142 - medium very slightly greenish Blue; strong (web RGB code: 044ffb) 143 - medium very slightly greenish Blue; very slightly greyish (web RGB code: 275cd8)

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 144 - medium dark very slightly greenish Blue; strong (web RGB code: 0334a7)

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 Blue 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)
 violetish Blue

n/a

 157 - light violetish Blue; strong (web RGB code: ccabfe)

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 158 - medium light violetish Blue; strong (web RGB code: 9a58fc) 159 - medium light violetish Blue; very slightly greyish (web RGB code: 9e70e4)

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 160 - medium violetish Blue; strong (web RGB code: 6704fb) 161 - medium violetish Blue; very slightly greyish (web RGB code: 6d26d9)

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 162 - medium dark violetish Blue; strong (web RGB code: 4503a7)

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 bluish Violet 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)
 Violet

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 175 - light Violet; strong (web RGB code: edabfe)

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 176 - medium light Violet; strong (web RGB code: db58fc) 177 - medium light Violet; very slightly greyish (web RGB code: cd70e4)

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 178 - medium Violet; strong (web RGB code: ca04fb) 179 - medium Violet; very slightly greyish (web RGB code: b527d8)

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 180 - medium dark Violet; strong (web RGB code: 8603a7)

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 bluish Purple

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 181 - light bluish Purple; strong (web RGB code: faabfe)

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 182 - medium light bluish Purple; strong (web RGB code: f358fc) 183 - medium light bluish Purple; very slightly greyish (web RGB code: df70e4)

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 184 - medium bluish Purple; strong (web RGB code: ee04fb) 185 - medium bluish Purple; very slightly greyish (web RGB code: cf27d8)

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 186 - medium dark bluish Purple; strong (web RGB code: 9e03a7)

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 Purple 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)
 reddish Purple

n/a

 199 - light reddish Purple; strong (web RGB code: feabe1)

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 200 - medium light reddish Purple; strong (web RGB code: fc58c2) 201 - medium light reddish Purple; very slightly brownish (web RGB code: e470bc)

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 202 - medium reddish Purple; strong (web RGB code: fb04a5) 203 - medium reddish Purple; very slightly brownish (web RGB code: d8279a)

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 204 - medium dark reddish Purple; strong (web RGB code: a7036d)

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 strongly purplish Red 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)
 slightly purplish Red

n/a

 217 - light slightly purplish Red; strong (web RGB code: feabc0)

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 218 - medium light slightly purplish Red; strong (web RGB code: fc5882) 219 - medium light slightly purplish Red; very slightly brownish (web RGB code: e4708d)

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 220 - medium slightly purplish Red; strong (web RGB code: fb0442) 221 - medium slightly purplish Red; very slightly brownish (web RGB code: d82754)

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 222 - medium dark slightly purplish Red; strong (web RGB code: a7032d)

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 Grey

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 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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Placing the cursor over the top right corner of the pattern displays the color ID, description and web RGB code.

Comments

Gemval.com's color grading system is a simplified modification of the Gemological Institute of America (GIA) color grading standards for natural gemstones. The difference and the most important features of Gemval.com color grading system are:

- Unlike GIA's standard color set, Gemval.com's web color communication system is designed to fit a 32-bit LCD computer monitor precisely and specifically enable color recognition via a web interface. For your convenience each pattern refers both to the GIA color scale and to the web color code (RGB code).

- A gemstone's color is probably the most important factor in the online appraisal procedure. To make selecting a color more straightforward, we have reduced the number of color patterns within the hue and saturation scales. This simplified model is aimed primarily at gem collectors and amateurs, but the system is also suitable for jewelry professionals who trade online.

- The most interesting and unique feature of the system is "minimal value gap" modelling. This means we have kept the highest level of detail in color areas, which have the greatest impact on a gem's value, and we have reduced the color precision scale for areas of unsaturated / dark colors, usually applicable to inexpensive gemstone varieties. Therefore the system assures that the value estimation error remains minimal for neighboring cells of the matrix.

- The color grade system represents the core of Gemval.com's online appraisal system. It consists of 230 color patterns, 25 base hue sets + grey scale, extended by 6 tones (very light, light, medium light, medium, medium dark, dark) and by 3 saturation grades (strong, very slightly greyish/brownish, slightly greyish/brownish).

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