| Color Name with Dictionary Source in nbsnotes | NBS-ISCC color number |
| O |
|
| Oa |
GO TO TOP |
| oad(M) + (oak -) | 186 |
| oak [brown](M) + (oak -) | 55 | 58 |
| oak brown(T) | 55 | 58 |
| oakbuff(M) | 57 | 76 | 77 |
| oak [green](M) + (oak green -) | 106 |
| oakheart(M) | 19 | 43 |
| oak leaf(P) | 127 |
| oakleaf brown(M) | 51 | 54 | 55 |
| oakwood(M,TC) | 58 |
| oasis(M) | 106 | 120 |
| oatmeal(T) | 90 |
| Ob |
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| obscuro-virens(B) | 107 | 110 | 125 | 127 | 145 | 146 | 150 | 151 |
| Oc |
GO TO TOP |
| ocean gray(BuOrd)(F) | 186 |
| ocean gray(N 17,USA 330)(F) | 265 |
| ocean green(M) | 135 |
| ocean wave(P) | 163 |
| ocher red(M,R) | 19 |
| ochraceous(M) | 71 |
| ochraceous-buff(R) | 28 | 29 |
| ochraceous-orange(R) | 68 | 69 |
| ochraceous-salmon(R) | 53 |
| ochraceous-tawny(R) | 72 | 74 |
| ochraceus(B) | 28 | 29 | 50 | 53 | 68 | 69 | 72 |
| ochre(M) | 71 |
| ochre(S) | 51 | 53 | 57 | 67 | 71 | 73 | 74 | 83 | 84 | 86 |
| 87 |
| ochre de ru(M) | 54 | 74 |
| ochre red(M) | 38 |
| octoroon rose(P) | 19 | 45 |
| Oi |
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| oil blue(M) | 194 |
| oil green(M) | 136 |
| oil green(R) | 120 |
| oil yellow(M) | 102 |
| oil yellow(M) | 103 |
| Ok |
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| oker de luce(M) | 54 | 74 |
| oker de luke(M) | 54 | 74 |
| oker de rouse(M) | 54 | 74 |
| Ol |
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| Old |
GO TO TOP |
| old amethyst(M) | 16 | 259 |
| old blue(M) | 185 | 186 | 191 |
| old blue(TC) | 185 |
| old bronze(M) | 94 | 106 |
| old burgundy(M) | 44 | 47 |
| old burgundy(R) | 21 |
| old cedar(M) | 43 |
| old china(M) | 186 | 204 |
| old china(TC) | 182 |
| old coral(M,P) | 15 |
| olde(M) | 101 | 102 |
| old english brown(M) | 81 | 95 | 96 |
| old glory blue(TC) | 200 |
| old glory red(TC) | 11 |
| old gold(M) | 106 |
| old gold(P) | 68 | 71 | 84 |
| old gold(R) | 88 | 94 |
| old gold(T) | 85 | 88 | 94 |
| old gold(TC) | 88 |
| old gold(USA)(TC) | 87 |
| old helio(M) | 224 |
| old ivory(M) | 90 | 91 | 94 |
| old lavender(M) | 235 |
| old lavender(P) | 226 |
| old lavender(T) | 214 | 228 |
| old lilac(M) | 228 | 245 |
| old master green(P) | 127 |
| old mauve(M) | 229 | 259 |
| old moss [green](M) + (old moss -) | 106 |
| old olive(M) + (old olrive -) | 95 |
| old pink(M) | 57 |
| old red(M) | 13 | 15 |
| old rose(M) | 19 |
| old rose(P) | 6 |
| old rose(R) | 15 |
| old rose(T) | 6 | 19 |
| old rose(TC) | 6 |
| old roseleaf(M) | 16 |
| old silver(M) | 265 |
| old wine(T) | 16 | 19 | 259 |
| old wood(M) | 19 |
| Oli |
GO TO TOP |
| olivaceo-bubalinus(B) | 89 | 90 |
| olivaceo-citrinus(B) | 85 | 88 | 94 | 95 | 103 | 106 | 107 |
| olivaceo-griseus(B) | 110 | 112 | 113 |
| olivaceo-niger(B) | 113 | 127 | 128 | 156 | 266 |
| olivaceous(M) | 107 |
| olivaceous black (1) (olivaceous black -) | 113 |
| olivaceous black (2) (olivaceous black -) | 127 | 128 |
| olivaceous black (3) (olivaceous black -) | 113 | 266 |
| olivaceus(B) + (olivaceous -) | 80 | 81 | 88 | 91 | 94 | 95 | 103 | 106 | 107 | 110 |
| olive(A) | 106 | 107 | 108 | 109 | 110 | 111 |
| olive(R) | 107 | 110 |
| olive(S) | 95 | 110 | 122 |
| olive(SC) | 106 | 107 | 109 | 110 |
| olive(T) | 106 | 107 | 110 |
| olive(TC) | 125 |
| olive bistre(S) | 69 | 72 | 74 | 77 | 85 | 87 | 88 | 89 | 90 | 91 |
| 93 | 94 | 106 | 112 | 122 | 264 |
| olive black(RC) | 111 | 113 |
| olive black(S) | 110 | 113 |
| olive brown(M) | 95 |
| olive-brown(R) (olive brown -) | 80 |
| olive brown(S) | 58 | 63 | 78 | 80 | 81 | 95 | 110 | 113 |
| olive brown(SC) | 95 | 96 |
| olive-buff(R) | 89 | 90 |
| olive-citrine(R) | 107 |
| olive drab(AN 504,USA 108)(F 1405)(PC)(F) | 96 |
| olive drab(AN 613,USA 319)(F 3412)(M) | 110 |
| olive drab(USA 202)(F 2430) | 108 |
| olive drab(T) | 110 | 113 |
| olive glow(P) | 104 | 121 |
| olive-gray(R) + (olive gray -) | 109 | 112 |
| olive gray(RC) | 113 |
| olive gray(S) | 107 | 112 | 113 | 122 | 155 | 156 |
| olive gray(SC) | 109 | 110 | 112 |
| olive gray(T) | 109 | 110 | 112 | 113 | 127 |
| olive green(USA 110(F) | 108 |
| olive [green](M) + (olive green -) | 107 |
| olive green(R) | 107 |
| olive green(S) | 88 | 89 | 90 | 91 | 93 | 100 | 106 | 107 | 109 | 110 |
| 112 | 113 | 117 | 120 | 122 | 123 | 125 | 127 | 150 | 151 |
| 155 | 156 |
| olive green(T) | 107 | 125 |
| olive grey(M) + (olive gray -) | 122 | 155 |
| olive hint(P) | 104 | 121 |
| olive lake(R) | 91 | 106 |
| olive-ocher(R) | 87 | 88 |
| olivesheen(M) | 91 |
| olive terra verte(M) | 106 |
| olive wood(M) | 80 |
| olive yellow(M-12L2) | 103 |
| olive yellow(M-14L2) | 106 |
| olive-yellow(R) + (olive yellow -) | 102 |
| olive yellow(S) | 31 | 33 | 73 | 86 | 87 | 89 | 93 |
| olive yellow(SC) | 88 |
| olive yellow(T) | 100 | 103 |
| olivine(M,R) | 135 |
| Oly |
GO TO TOP |
| olympia(M) | 160 | 164 |
| olympian blue(M) + | 179+ |
| olympian green(M) | 136 |
| olympic(M) | 187 |
| olympic blue(M) | 169 |
| olympic blue(R) | 178 |
| Om |
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| ombre(P) | 187 | 267 |
| On |
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| ondine(M) | 149 |
| onion-peel(M) + (onion-peel u -) | 19 |
| onion red(M) | 19 |
| onion-skin pink(M) | 29 | 53 | 57 |
| onion-skin pink(R) | 29 | 53 |
| ontario violet(M) | 203 |
| ontario violet(R) | 210 |
| Oo |
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| oold(M) | 101 | 102 |
| Op |
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| opal(M) | 164 |
| opal blue(M) | 186 |
| opal green(P) | 164 |
| opal grey(M) + (opal gray -) | 22 | 265 |
| opaline green(M) | 143 |
| opaline green(R) | 119 | 121 |
| opal mauve(M) | 10 |
| opaq(M) | 136 |
| opera blue(P) | 183 | 200 |
| opera mauve(M,P) | 240 |
| opera pink(M) | 28 | 29 | 31 | 32 |
| opera pink(P) | 28 |
| ophelia(M-52F8) | 241 | 262 |
| ophelia(M-53A7) | 245 |
| oporto(M) | 16 | 17 |
| Or |
GO TO TOP |
| Ora |
GO TO TOP |
| orange(A) | 49 | 50 | 51 | 52 | 53 | 54 |
| orange(BuOrd)(F) | 35 |
| orange(USA 107)(F 1210)(H,MUP) | 34 |
| orange(USA 315)(F 3205)(P,R) | 50 |
| orange(S) | 25 | 26 | 28 | 29 | 34 | 35 | 37 | 48 | 49 | 50 |
| 51 | 52 | 53 | 66 | 67 | 68 | 69 | 1- | 70+ | 71+ |
| 72 | 73 | 76 | 83 | 84 | 86 | 87 | 89 |
| orange(T) | 25 |
| orange(TC) | 50 |
| orange(USA)(TC) | 34 |
| orange aurora(M) | 26 | 27 | 37 |
| orange blush(P) | 73 |
| orange brown(S) | 16 | 37 | 39 | 40 | 51 | 53 | 54 | 55 | 57 | 58 |
| 60 | 79 |
| orange buff(H) | 70 | 71 | 83 | 84 | 86 | 87 |
| orange-buff(R) + (orange buff -) | 71 |
| orange buff(S) | 29 |
| orange chrome(R) | 48 |
| orange-cinnamon(R) | 53 |
| orange-citrine(R) | 94 |
| orange cream(P) | 89 |
| orange lead(M) | 34 |
| orange madder(M) | 50 |
| orange ochre(M) | 50 |
| orange-peel(M) | 50 |
| orange-pink(R) | 49 | 52 |
| orange red(S) | 6 | 35 | 37 |
| orange rufous(M) | 50 |
| orange-rufous(R) + (orange rufous -) | 51 |
| orange rust(T) | 51 | 54 |
| orange tawny(M) | 37 |
| orange vermilion(M) | 35 |
| orange vermilion(S) | 37 | 51 |
| orange-vinaceous(R) + | 3+ | 26+ |
| orange yellow(AN 506)(F) | 66 | 68 |
| orange yellow(S) | 48 | 49 | 50 | 52 | 67 | 68 | 69 | 70 | 71 |
| Orc |
GO TO TOP |
| orchadee(M) | 240 |
| orchall(M) | 258 |
| orchid(M) | 222 | 227 |
| orchid(P) | 253 |
| orchid(T) | 237 | 240 | 241 | 248 | 250 |
| orchid(TC) | 222 |
| orchid gray(T) | 228 |
| orchid haze(T) | 227 | 232 |
| orchid lane(P) | 221 |
| orchid leaf(P) | 226 |
| orchid mauve(P) | 251 |
| orchid mist(T) | 226 | 227 | 232 | 253 |
| orchid night(P) | 19 | 262 |
| orchid pink(M) | 2 |
| orchid pink(P) | 4 | 5 |
| orchid pink(T) | 249 | 250 |
| orchid purple(H) | 236 |
| orchid rose(T) | 248 | 258 |
| orchid smoke(P) | 253 |
| orchid taupe(T) | 228 | 229 |
| orchid tint(T) | 226 | 231 |
| orchil(acid bath)(M) + (orchil -) | 15 |
| orchil(alkaki bath)(M) + (orchil -) | 258 |
| orchis(M) | 19 |
| Ori |
GO TO TOP |
| orient(M) | 5 |
| oriental(M) | 186 |
| oriental blue(H) | 176 |
| oriental blue(M-38A8) | 204 |
| oriental blue(M-41F12) | 178 | 196 |
| oriental blue(TC) | 178 |
| oriental bole(M) + | 43+ |
| oriental bronze(P) | 95 |
| oriental fuchsia(M) | 238 |
| oriental green(M) | 131 | 136 |
| oriental green(R) | 136 |
| oriental pearl(M) | 112 | 265 |
| oriental red(M) | 12 |
| oriental sand(P) | 109 |
| orient [blue](M-36D11) + (orient blue -) | 178 |
| orient blue(M-36G7,R) | 182 | 186 |
| orient pink(H) | 28 | 29 |
| orient pink(M) | 29 |
| orient pink(R) | 26 |
| orient red(H) | 11 |
| orient red(M) | 12 |
| orient yellow(M-9L8) | 50 | 53 | 68 | 7188- | 71+ |
| orient yellow(M-13L6) | 7188- | 88+ | 91 |
| oriole(M) | 54 |
| orion(M) | 183 |
| Orl |
GO TO TOP |
| orlean(M) | 29 |
| Orm |
GO TO TOP |
| ormond(M) | 45 | 60 | 63 |
| Orp |
GO TO TOP |
| orpiment(M) | 83 | 84 | 86 | 87 |
| orpiment orange(H,M) | 48 | 50 |
| orpiment red(M) | 68 | 71 |
| orpin(M) | 83 | 84 | 86 | 87 |
| Ors |
GO TO TOP |
| orseille(M) | 258 |
| Ot |
GO TO TOP |
| otter [brown](M) + (otter -) | 81 |
| Ou |
GO TO TOP |
| oural green(M) | 135 | 148 |
| oural green(R) | 134 | 135 |
| Ow |
GO TO TOP |
| owl(M) | 64 |
| Ox |
GO TO TOP |
| oxblood red(H) | 16 |
| oxblood [red](M) + (oxblood red -) | 43 |
| ox-blood red(R) + (oxblood red -) | 13 |
| oxford blue(M) | 230 |
| oxford chrome(M) | 71 |
| oxford gray(T) | 266 |
| oxford ochre(M) | 71 |
| oxford yellow(M) | 71 |
| oxgall(M) | 84 |
| oxheart(M) | 13 |
| oxide blue(M) | 167 |
| oxide blue(R) | 178 | 182 |
| oxide brown(M) | 43 |
| oxide purple(M) | 43 |
| oxide yellow(M) | 71 |
| Oy |
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| oyster gray(MA)(F) | 264 |
| oyster grey(M) + (oyster gray -) | 121 |
| oyster [white](M) + (oyster white -) | 121 |
| oyster white(T) | 263 | 264 |