This information is collected from various sites and collated into one table.

Remember that the HTML colour shown is an approximation and will vary slightly from the paint, it is there as a guide only.

Colour New Citadel***** Old Citadel Vallejo Game Color Vallejo Model Color Rackham Reaper Master Privateer Press P3**** Coat D’arms*** Army Painter Hex Code
  White Scar Skull White* Dead White (001) White (951) Eternal White (1) Pure White (9039) Morrow white White (101) Matt White (WP1102) FFFFFF
  Ceramite White Smelly Primer* White Primer (002) Foundation White (919)   –   Brush-on Primer (9108) Morrow White Grey Primer (141)   –   FFFFFF
  Kislev Flesh Pallid Flesh* Pale Flesh (003) Light Flesh (928) Pearly Flesh (31) Rosy Highlight (9069) Ryn Flesh Flesh (213) Kobold Skin EEC8C7
  Bestigor Flesh Elf Flesh* Elf Skintone (004) Flat Flesh (955) Craggy Skin (30) Rosy Highlight ** (9069)   –   Elven Flesh (123)   –   F7BD7B
  Dorn Yellow** Bad Moon Yellow* Bad Moon Yellow (005) Lemon Yellow (952)   –   Clear Yellow (9095)   –   Dusky Yellow (146)   –   FFF700
  Flash Gitz Yellow Sunburst Yellow* Sunblast Yellow (006) Flat Yellow (953) Lahn Yellow (40) Sun Yellow (9008)   –   Sun Yellow (103) Demonic Yellow (WP1107) FFE700
  Yriel Yellow Golden Yellow* Gold Yellow (007) Golden Yellow (948) Royal Yellow (39) Marigold Yellow (9007)   –   Golden Yellow (159)   –   FFCE00
  Tallarn Sand Desert Yellow* Desert Yellow (063) Dark Yellow (978)   –   Faded Khaki (9129)   –     –   Desert Yellow (WP1121) 9C8855
  Jokaero Orange Macharius Solar Orange* Heavy Orange (152) German Orange (805)   –   Phoenix Red (9005)   –     –     –   EE3823
  Fire Dragon Bright Fiery Orange * Orange Fire (008) Light Orange (911) Merin’s Fire (38) Fire Orange (9006)   –   Flame Orange (105) Prison Jumpsuit (WP1211 Zombiecide) FF8552
  Troll Slayer Orange Blazing Orange* Hot Orange (009) Scarlet (817) Fusion Red (37) Phoenix Red (9005)   –   Burnt Orange (147) Mythical Orange (WP1442) F46C2E
  Mephiston Red Mechrite Red* Heavy Red (141) Red (926)   –   Clotted Red (9134)   –     –   Vampire Red (WP1460) 991115
  Evil Sunz Scarlet Blood Red* Bloody Red (010) Vermillion (909) Rackham Red (36) Clear Red (9094)   –   Blood Red (104) Pure Red (WP1104) C21920
  Wild Rider Red   –     –     –     –     –     –     –   Mars Red (WP1436) EB2E28
  Wazdakka Red Red Gore* Gory Red (011) Cavalry Brown (982) Natural Leather (34) Carnage Red (9135)   –   Vampire Red (129) Dragon Red (WP1105) 940008
  Khorne Red Scab Red* Scarlett Red (012) Carmine Red (908) Arcavia Red (35) Deep Red (9002)   –     –   Chaotic Red (WP1142) 6A0002
  Emperor’s Children Tentacle Pink* Squid Pink (013) Pink (958) Fiend Flesh (33) Pale Violet ** (9027) Carnal Pink Shocking Pink (144)   –   EF9CB5
  Screamer Pink Warlock Purple* Warlord Purple (014) Magenta (945) Celestial Pink (46) Pale Violet Red (9027)   –   Warlock Purple (157)   –   9C004A
  Xereus Purple Liche Purple* Hexed Lichen (015) Royal Purple (810) Divine Purple (6) Clear Plum (9132) Beaten Purple (93051) Poison Purple (118) Alien Purple (WP1128) 5A005A
  Naggaroth Night Imperial Purple* Royal Purple (016) Royal Purple (810)   –   Deep Amethyst (9079)   –   Amethest Purple (160)   –   562F7E
    –   Nauseating Blue * Sick Blue (017) Violet ** (960)   –   Clear Purple (9099)   –   Nauseous Blue (162)   –   412A7A
    –   Storm Blue * Stormy Blue (018) Blue (925) Migol Blue (5) Ritterlich Blue ** (9115)   –     –     –   27357E
    –   Midnight Blue* Night Blue (019) Dark Sea Blue Abyssal Blue (3) Ultramarine Shadow (9187)   –     –     –   000031
  Kantor Blue Regal Blue* Imperial Blue (020) Dark Prussian blue   –   Brilliant Blue (9116)   –   Royal Blue (110) Deep Blue (WP1116) 08085A
  Altdorf Guard Blue Ultramarine Blue Ultra Marine Blue (022) Ultramarine (839) Wizard Blue ** (7) Ultramarine Highlight ** (9189)   –   Marine Blue (148) Ultramarine Blue (WP1115) 29397B
  Macragge Blue Mordian Blue* Heavy Blue (143) Prussian Blue (965)   –   Breonne Blue (9055)   –     –     –   2D567C
  Caledor Sky Enchanted Blue* Magic Blue (021) Dark Blue (930) Ephren Blue (4) Cyan Blue ** (9117)   –   Wizard Blue (114)   –   31639C
  Lothern Blue Ice Blue Ice Blue (095) Azure ** (902) Glacier Blue (9)   –     –     –     –   6B9CCE
  Teclis Blue Lightning Bolt Blue * Electric Blue (023) Sky Blue (961) Sacred Blue ** (8) Sky Blue ** (9018)   –   High Elf Blue (117) Electric Blue (WP1113) 8BB9DD
  Sotek Green Hawk Turquoise Falcon Turquoise (024) Light Turquoise (840) Precious Blue (12) Marine Teal (9077)   –   Aquamarine (132) Hydra Turquoise (WP1141) 006B5A
  Sybarite Green Vile Green * Foul Green (025) Park Green Flat (969) Antique Green (13)   –     –     –     –   82C59C
  Kabalite Green Jade Green* Jade Green (026) Emerald (838)   –   Reptilian Greens Triad ** (9184/9185/9186)   –   Jade Green** (158)   –   069B7D
    –   Scaly Green * Scurf Green (027) Emerald (838) Chitin Green (19) Clear Viridian (9131)   –     –     –   026B67
  Caliban Green Dark Angels Green* Dark Green (028) Deep Green (970) Diisha Green (18) Pine Green ** (9010) Gnarls Green ** Dark Elf Green (111) Angel Green (WP1112) 005221
  Warpstone Glow Snot Green* Sick Green (029) Intermediate Green (891) Avagddu Green (17) Clear Green (9096)   –   Bogey Green (121)   –   106B21
  Warboss Green Goblin Green* Goblin Green (030) Pastel Green (885) Chasm Green (16) Field Green ** (9167)   –   Goblin Green (108) Goblin Green (WP1109) 63B521
  Elysian Green Camo Green* Camouflage Green (031) Olive Green (967)   –   Camoflage Green ** (9177)   –     –     –   A5A542
  Moot Green Scorpion Green* Scorpy Green (032) Light Green (942) Quithayran Green (14) Pale Green (9012)   –   Scorpion Green (152)   –   A5D610
    –   Bilious Green * Livery Green (033) Yellow Green ** (954) Mystic Green (15) Spring Green ** (9146)   –     –     –   A9D171
  Castellan Green Catachan Green* Cayman Green (067) Olive Grey (888)   –   Muddy Olive (9034)   –     –     –   455440
  Waaagh! Flesh Orkhide Shade* Heavy Blackgreen (147) Black Green (980)   –   Jungle Moss (9082)   –     –     –   384E49
  Loren Forest Knarloc Green* Heavy Green (146) Luftwaffe Ca. Green (823)   –   Olive Drab (9158)   –     –   Army Green (WP1110) 434F38
  Deathworld Forest Gretchin Green* Heavy Khaki (149) Russian Uniform WW2 (70.924)   –   Worn Olive (9159)   –     –   Venom Wyrm (WP1461) 5D6732
  Straken Green   –     –     –     –     –     –     –     –   628026
  Nurgling Green Rotting Flesh* Dead Flesh (035) Green Sky Dead Flesh (11) Pale Olive (9036) Jack Bone Putrid Green (125) Necrotic Flesh 849B63
  Ushabti Bone Bleached Bone* Bonewhite (034) Buff (976) Wildcat Gray ** (42) Yellowed Bone (9143) Menoth White Base Bone (112) Skeleton Bone (WP1125) EFD9A8
  Zandri Dust Kommando Khaki* Khaki (061) G. Cam.Beige (821)   –   Terran Khaki (9122)   –     –     –   9E915C
  Pallid Wych Flesh   –     –     –     –     –     –     –     –   CDCEBE
  Screaming Skull   –     –     –     –     –   Menoth White Highlight   –     –   F0F1CE
  Bronzed Flesh * Bronze Flesh (036) Dark Flesh (927)   –   Burnt Orange ** (9111)   –   Tanned Flesh (115)   –   F7944A
  Tau Light Ochre Vomit Brown* Filthy Brown (037) Beige Red ** Tanned Skin (29) Tanned Leather (9031) Rucksack Tan Bilious Brown (130)   –   DE9408
  Ratskin Flesh Dwarf Flesh* Dwarf Skin (041) Brown Sand   –   Rosy Skin (9068)   –   Dwarven Flesh (124) Barbarian Flesh (WP1126) F78C5A
  Bugman’s Glow Tanned Flesh * Tan (066)   –     –   Antique Rose (9139) Khardic Flesh   –   Tanned Flesh (WP1127 ) A95C3E
    –   Leprous Brown* Scrofulous Brown (038) Gold Brown (877)   –   Saffron Sunset ** (9182)   –   Leprous Brown (156)   –   D88E2D
  Zamesi Desert Bubonic Brown* Plague Brown (039) Yellow Ochre (913) Forgotten Gold (25) Palomino Gold (9074) Moldy Ochre Festering Brown (126)   –   C68400
  Balor Brown Snakebite Leather* Cobra Leather / Leather Brown (040) Brown Sand (876) Kalliene Yellow (23) Chestnut Gold (9073)   –   Barbarian Leather (116)   –   9C6B08
  Balor Brown Tausept Ochre* Heavy Ochre (150) Ochre Brown (856)   –   Half Orc Highlight (9204)   –     –     –   976F3C
  Skrag Brown Vermin Brown* Parasite Brown (042) Orange Brown (981) Syhar Soil (24) Chestnut Brown ** (9071)   –   Rat Brown (119)   –   843910
  Rhinox Hide Scorched Brown* Charred Brown (045) Burnt Umber (941)** Dirty Leather (20) Muddy Brown (9028) Umbral Umber   –     –   390008
  Doombull Brown Dark Flesh* Dark Fleshtone (044) Mahogany Brown (846) Beastly Flesh (21) Chestnut Brown (9071)   –     –     –   630808
  Baneblade Brown Khemri Brown* Heavy Brown (153) Green Brown   –   Woodstain Brown (9160)   –     –     –   705E48
  Mournfang Brown Bestial Brown* Beasty Brown (043) Flat Brown (984) Soil of Avagddu (22) Intense Brown (9138) Bloodtracker Brown Hairy Brown (120)   –   663300
  Mournfang Brown Calthan Brown* Heavy Siena (154) Flat Brown (984)   –   Dark Highlight (9042)   –     –     –   6D5044
  XV-88 Terracotta* Terracotta (065)   –     –   Clotted Red (9134) Bootstrap Leather   –     –   793721
  Steel Legion Drab Graveyard Earth* Earth (062) US Field Drab   –   Uniform Brown (9127) Gun Corps Brown   –   Leather Brown (WP1123) 655138
  Karak Stone Kommando Khaki* Khaki (061) German Cam. Beige WWII (821)   –   Terran Khaki (9122)   –     –     –   9B8C7B
  Ulthuan Grey Ghostly Grey * Ghost Grey (046) Flat Aluminum (993)   –   Ghost White (9063)   –     –     –   C3C6CD
  Fenrisian Grey Space Wolves Grey* Wolf Grey (047) Pale Greyblue (907)   –   Snow Shadow (9021)   –   Lupin Grey (151)   –   CEDEE7
  The Fang Shadow Grey* Sombre Grey (048) Oxford Blue (807)   –   Twilight Blue (9020)   –   Shadow Grey (150) Wolf Grey (WP1119) 4E5067
  Administratum Grey Fortress Grey* Stonewall Grey (049) Pale Grey Blue (907) Sharp Gray (43) Weathered Stone (9087)   –     –   Ash Grey (WP1117) B5B5B5
  Dawnstone Codex Grey* Cold Grey (050) Basalt Grey (869) Gray of Darkness (45) Rainy Grey (9038)   –     –   Uniform Grey (WP1118) 999999
  Mechanicus Standard Grey Adeptus Battlegrey* Heavy Grey ** Russian Unif. (924)   –   Military Green** Great Coat Grey   –     –   7C8286
  Celestra Grey Astronomicon Grey* Heavy Bluegrey (144) Pale Blue Grey (905)   –   Weathered Stone (9087) Frostbite   –     –   96A5A9
  Abaddon Black Chaos Black* Chaos Black / Black (051) Black (950) Accursed Black (2) Pure Black (9037) Thamar Black Black (102) Matt Black (WP1101) 000000
  Runefang Steel Mithril Silver* Mithril Silver / Silver (052) Silver (997) Polished Silver (49) Polished Silver (9054) Quicksilver Enchanted Silver (106) Shining Silver (WP1129) B5B5BD
  Ironbreaker Chainmail* Chain Mail (053) Natural Steel (864)   –   Honed Steel (9053) Cold Steel Chainmail (109) Plate Mail Metal (WP1130) 7B737B
  Leadbelcher Boltgun Metal* Gunmetal / Gunmetal Metal (054) Gunmetal Grey (863)   –   Shadowed Steel (9052) Pig Iron Gun Metal (142) Machinegun Metal (WP1221) 393939
  Auric Armour Gold Burnished Gold* Glorious Gold (056) Gold (996)   –   New Gold (9051) Brass Balls **   –   Bright Gold (WP1231) E7BD42
  Gehenna’s Gold Shining Gold* Polished Gold (055) Old Gold (878)   –   Antique Gold (9050) Solid Gold Bright Gold (107) Greedy Gold (WP1132) CCCC33
  Hashut Copper Dwarf Bronze* Bright Bronze (057) Bronze (998)   –   Ancient Bronze (9049) Molten Bronze Dwarven Bronze (143) Weapon Bronze (WP1133) 9C5221
  Runelord Brass Brazen Brass * Brassy Brass (058) Brass (801)   –   Tarnished Brass ** (9198)   –   Brass (131)   –   735A21
  Brass Scorpion Beaten Copper * Hammered Copper (059) Copper (999)   –   Coppery Orange (9102)   –     –     –   73372D
  Warplock Bronze Tin Bitz* Tinny Tin (060)   –     –   Scorched Metal (9125)   –   Magic Metal (113)   –   393121
    –   Black Ink * Black Ink (94)   –     –     –     –     –     –   000000
    –   Dark Green Ink * Green Ink (89)   –     –     –     –     –     –   108473
    –   Flesh Wash *   –     –     –     –     –   Ink Wash – Flesh (133)   –   CE8C42
    –   Magenta Ink *   –     –     –     –     –     –     –   513D3C
    –   Purple Ink * Violet Ink (87)   –     –     –     –     –     –   842994
  Stormvermin Fur Charadon Granite* Heavy Charcoal (155) German Grey (995)   –   Pure Black (9103)** Bastion Grey   –     –   4D4A4A
  Rakarth Flesh Dheneb Stone* Heavy Warmgrey **(148)   –     –   Vampiric Shadow (9274)   –     –   Drake Tooth (WP1417)? B9ADA1
  Daemonette Hide Hormagaunt Purple* Heavy Violet (142) Violet (960)   –   Nightshade Purple (9022)   –     –     –   4F566C
  Averland Sunset Iyanden Darksun* Heavy Goldbrown (151) Goldbrown (877)   –   Green Ochre (9128) Sulferic yellow   –     –   9C8A53
  Cadian Fleshtone Tallarn Flesh* Heavy Skintone (140) Brown Rose   –   Leather Brown (9030)   –     –     –   8D736C
  Drakenhof Nightshade Asurmen Blue Wash* Blue Shade Wash (73207)   –     –     –     –     –   Blue Tone Ink (WP1139) 273E51
  Carroburg Crimson Baal Red Wash* Red Shade Wash (73206)   –     –     –     –     –   Red Tone Ink (WP1138) 630808
  Nuln Oil Badab Black Wash* Black Wash (73201)   –     –     –   Armor Wash   –   Dark Tone Ink (WP1136) 000000
  Agrax Earthshade Devlan Mud Wash* Umber Shade Wash (73203)   –     –     –     –     –   Strong Tone Wash (WP1135) 393121
  Seraphim Sepia Gryphonne Sepia Wash* Sepia Wash (73200)   –     –     –     –     –   Soft Tone Ink (WP1134) 843910
  Druchii Violet Leviathan Purple Wash* **** Pale Grey Shade Wash (73202)   –     –     –     –     –   Purple Tone Ink (WP1140) 842994
  Reikland Fleshshade Ogryn Flesh Wash* Fleshtone Shade Wash (73204)   –     –     –     –     –   Flesh Wash (WP1143) CE8C42
  Biel-Tan Green Thraka Green Wash* Green Shade Wash (73205)   –     –     –     –     –   Green Tone Ink (WP1137) 434F38

( * ) discontinued,
( ** ) approximate,
( *** ) Coat D’arms match the OLD citadel colours so there might be some difference. Shining Gold has the most noticeable difference,
( **** ) P3 Paints did not really match very closely with the old GW range, but a detailed explanation of each paint can be found here: http://www.brushthralls.com/pre-painting-prep/color-theory-10p3.html
(*****) GW’s new range matches with the old range are the matches claimed by GW. However, many of the paints do not match very closely at all and some mixing will be required to get close to the original colours. If you are trying to match old GW with new GW, you’d be better just getting Vallejo Game Color or Coat D’arms for the closest match )
(color name) after testing does not match GW color