Colors That Start With O — Material study

Colors That Start With O: 240 Color Names and HEX Codes

Avatar for Matthew MatthysenByMatthew Matthysen Posted Updated

Colors that start with O range from pale Oat Flour and ocean blues to earthy Ochre, near-black Obsidian Shard, and fiery Orange Red. This atlas places 240 names, digital values, and swatches within easy reach. It also separates standardized CSS colors from creative catalog names whose HEX codes should stay attached.

 

 

What Counts as a Color That Starts With O?

This atlas contains 240 distinct displayed names beginning with O. Six belong to the standardized CSS named-color set and have fixed values in sRGB, the standard screen color space used here. The other 234 are curated design-catalog names that support browsing and naming but are not official standards.

Colors That Start With O

 

The Six Standardized CSS O Colors

The standardized set consists of Old Lace #FDF5E6, Olive #808000, Olive Drab #6B8E23, Orange #FFA500, Orange Red #FF4500, and Orchid #DA70D6. Their copy-ready CSS identifiers are oldlace, olive, olivedrab, orange, orangered, and orchid. The spaces and capital letters in the table are display formatting, not part of the literal identifiers.

A familiar name may have a different value in a paint range, creative catalog, or another naming system. When a catalog value conflicts with one of these six CSS names, the standardized CSS value controls the entry below.

 

Curated Names Versus Color Standards

The remaining name-to-HEX associations come from the handpicked meodai color-names catalog. Its contribution rules exclude duplicate names or HEX values, protected brands, offensive names, numbered sequences, and AI-generated names. Those controls make it a useful design reference, but they do not make its names technical standards.

Treat every entry marked “Curated design name” as one particular association. Save its code with its name because another catalog, paint maker, or designer may use the same wording for a visibly different color.

 

 

Colors That Start With O: 240 Names and HEX Codes

The groups remain alphabetically continuous. HEX controls each digital entry, and every RGB triplet and visible swatch agrees with its six-digit code. The status column distinguishes literal CSS identifiers from non-standard catalog names.

 

O Through Ob

This opening group runs from O Tannenbaum through Obsidian Stone, with oak, oasis, oat, and obsidian names arranged in order.

NameHEXRGBStatusColor
O Tannenbaum#0055220, 85, 34Curated design name 
Oak Barrel#715636113, 86, 54Curated design name 
Oak Brown#A18D80161, 141, 128Curated design name 
Oak Buff#CF9C63207, 156, 99Curated design name 
Oak Creek#5D504A93, 80, 74Curated design name 
Oak Harbour#CDB386205, 179, 134Curated design name 
Oak Plank#5D4F3993, 79, 57Curated design name 
Oak Ridge#C0B0AB192, 176, 171Curated design name 
Oak Shaving#EED8C2238, 216, 194Curated design name 
Oakmoss#6D7244109, 114, 68Curated design name 
Oakwood#BDA58B189, 165, 139Curated design name 
Oarsman Blue#648D95100, 141, 149Curated design name 
Oasis#0092A30, 146, 163Curated design name 
Oasis Sand#FCEDC5252, 237, 197Curated design name 
Oasis Spring#47A3C671, 163, 198Curated design name 
Oasis Stream#A2EBD8162, 235, 216Curated design name 
Oat Cake#E1CAB3225, 202, 179Curated design name 
Oat Field#C0AD89192, 173, 137Curated design name 
Oat Flour#F7E4CD247, 228, 205Curated design name 
Oat Milk#DEDACD222, 218, 205Curated design name 
Oat Straw#F1D694241, 214, 148Curated design name 
Oatmeal#C9C1B1201, 193, 177Curated design name 
Oatmeal Bath#DDC7A2221, 199, 162Curated design name 
Oatmeal Biscuit#B7A86D183, 168, 109Curated design name 
Oatmeal Cookie#EADAC6234, 218, 198Curated design name 
Oats and Honey#E7BF81231, 191, 129Curated design name 
Oberon#FCD389252, 211, 137Curated design name 
Obi Lilac#B0A3B6176, 163, 182Curated design name 
Objectivity#BBC6DE187, 198, 222Curated design name 
Oblivion#0004350, 4, 53Curated design name 
Obscure Ochre#88654E136, 101, 78Curated design name 
Obscure Olive#4A5D2374, 93, 35Curated design name 
Obscure Orange#BB5500187, 85, 0Curated design name 
Obscure Orchid#9D0759157, 7, 89Curated design name 
Observatory#008F700, 143, 112Curated design name 
Obsidian#44505568, 80, 85Curated design name 
Obsidian Brown#523E3582, 62, 53Curated design name 
Obsidian Shard#0603136, 3, 19Curated design name 
Obsidian Stone#3C3F4060, 63, 64Curated design name 

 

Ocean Through Oc

This group continues from Ocean through Octarine, preserving the alphabetical sequence across the ocean, ochre, and octarine entries.

NameHEXRGBStatusColor
Ocean#0054930, 84, 147Curated design name 
Ocean Air#DAE4ED218, 228, 237Curated design name 
Ocean Boat Blue#0077BE0, 119, 190Curated design name 
Ocean Breeze#D3E5EB211, 229, 235Curated design name 
Ocean Current#53778383, 119, 131Curated design name 
Ocean Depths#00657F0, 101, 127Curated design name 
Ocean Foam#CAC8B4202, 200, 180Curated design name 
Ocean Front#B8E3ED184, 227, 237Curated design name 
Ocean Green#3D997361, 153, 115Curated design name 
Ocean Horizon#7FC1D8127, 193, 216Curated design name 
Ocean Liner#18908624, 144, 134Curated design name 
Ocean Mirage#00748F0, 116, 143Curated design name 
Ocean Night#63719599, 113, 149Curated design name 
Ocean Oasis#006C680, 108, 104Curated design name 
Ocean Pearl#D3CFBD211, 207, 189Curated design name 
Ocean Reef#1F989B31, 152, 155Curated design name 
Ocean Sand#E4D5CD228, 213, 205Curated design name 
Ocean Shadow#5B788691, 120, 134Curated design name 
Ocean Silk#C8DCD5200, 220, 213Curated design name 
Ocean Soul#00878F0, 135, 143Curated design name 
Ocean Storm#3F677E63, 103, 126Curated design name 
Ocean Surf#79A2BD121, 162, 189Curated design name 
Ocean Tropic#67A6D4103, 166, 212Curated design name 
Ocean Wave#7DBCAA125, 188, 170Curated design name 
Ocean Weed#6C6541108, 101, 65Curated design name 
Oceanic#4F6D8279, 109, 130Curated design name 
Oceanic Noir#172B3623, 43, 54Curated design name 
Oceanus#90ABA8144, 171, 168Curated design name 
Ocelot#F1E2C9241, 226, 201Curated design name 
Ochicha Latte#6B6047107, 96, 71Curated design name 
Ochraceous Salmon#D99E73217, 158, 115Curated design name 
Ochre#CC7722204, 119, 34Curated design name 
Ochre Brown#9F7B3E159, 123, 62Curated design name 
Ochre Maroon#CC7733204, 119, 51Curated design name 
Ochre Pigment#C77135199, 113, 53Curated design name 
Ochre Revival#EEC987238, 201, 135Curated design name 
Ochre Spice#E96D03233, 109, 3Curated design name 
Octagon Ocean#085B738, 91, 115Curated design name 
Octarine#CCDD00204, 221, 0Curated design name 

 

Oil Through Old

This group runs from Oil through Olden Amber, combining the Oil and Old name families in one continuous alphabetical sequence.

NameHEXRGBStatusColor
Oil#31333049, 51, 48Curated design name 
Oil Blue#678F8A103, 143, 138Curated design name 
Oil Green#7B7F68123, 127, 104Curated design name 
Oil Grey#3B313159, 49, 49Curated design name 
Oil on Fire#FF5511255, 85, 17Curated design name 
Oil Rush#33314451, 49, 68Curated design name 
Oil Slick#0316023, 22, 2Curated design name 
Oil Yellow#C2AB3F194, 171, 63Curated design name 
Oilcloth Green#83BA8E131, 186, 142Curated design name 
Oiled Teak#6C5A51108, 90, 81Curated design name 
Oilseed Crops#C2BE0E194, 190, 14Curated design name 
Oily Purple#2D0F4745, 15, 71Curated design name 
Oily Steel#99AAAA153, 170, 170Curated design name 
Oitake Green#5E644F94, 100, 79Curated design name 
OK Corral#D07360208, 115, 96Curated design name 
Oklahoma Wheat#F5E0BA245, 224, 186Curated design name 
Okonomiyaki Brown#BA7D4C186, 125, 76Curated design name 
Okra#3E912D62, 145, 45Curated design name 
Okroshka#40533D64, 83, 61Curated design name 
Oktoberfest#EFCB96239, 203, 150Curated design name 
Old Amethyst#87868F135, 134, 143Curated design name 
Old Army Helmet#61665297, 102, 82Curated design name 
Old Asparagus#929000146, 144, 0Curated design name 
Old Bamboo#769164118, 145, 100Curated design name 
Old Bone#DBC2AB219, 194, 171Curated design name 
Old Boot#7C644B124, 100, 75Curated design name 
Old Botanical Garden#5E624A94, 98, 74Curated design name 
Old Brick#8A3335138, 51, 53Curated design name 
Old Brown Crayon#33000051, 0, 0Curated design name 
Old Burgundy#43302E67, 48, 46Curated design name 
Old Celadon#A8A89D168, 168, 157Curated design name 
Old Chalk#E3D6E9227, 214, 233Curated design name 
Old Cheddar#DD6644221, 102, 68Curated design name 
Old Coffee#704241112, 66, 65Curated design name 
Old Copper#73503B115, 80, 59Curated design name 
Old Cumin#784430120, 68, 48Curated design name 
Old Driftwood#97694F151, 105, 79Curated design name 
Old Eggplant#61405197, 64, 81Curated design name 
Old Eggshell#CDC4BA205, 196, 186Curated design name 
Old Faithful#82A2BE130, 162, 190Curated design name 
Old Fashioned Pink#F4C6CC244, 198, 204Curated design name 
Old Fashioned Purple#73486B115, 72, 107Curated design name 
Old Flame#F2B7B5242, 183, 181Curated design name 
Old Four Leaf Clover#757D43117, 125, 67Curated design name 
Old Geranium#C66787198, 103, 135Curated design name 
Old Gold#CFB53B207, 181, 59Curated design name 
Old Green#839573131, 149, 115Curated design name 
Old Heliotrope#563C5C86, 60, 92Curated design name 
Old Ivory#FFFFCB255, 255, 203Curated design name 
Old Lace#FDF5E6253, 245, 230CSS keyword: oldlace 
Old Lavender#796878121, 104, 120Curated design name 
Old Leather#A88B66168, 139, 102Curated design name 
Old Lime#AEC571174, 197, 113Curated design name 
Old Mahogany#4A010074, 1, 0Curated design name 
Old Mandarin#8E2323142, 35, 35Curated design name 
Old Map#D5C9BC213, 201, 188Curated design name 
Old Mauve#673147103, 49, 71Curated design name 
Old Mill Blue#6E6F82110, 111, 130Curated design name 
Old Money#2C5C4F44, 92, 79Curated design name 
Old Pearls#F6EBD7246, 235, 215Curated design name 
Old Pink#C77986199, 121, 134Curated design name 
Old Plaster#EBA770235, 167, 112Curated design name 
Old Rose#C08081192, 128, 129Curated design name 
Old Silver#848482132, 132, 130Curated design name 
Old Vine#687760104, 119, 96Curated design name 
Old Whiskey#DDAA55221, 170, 85Curated design name 
Old Wine#90091F144, 9, 31Curated design name 
Old Yellow Bricks#ECE6D7236, 230, 215Curated design name 
Olde World Gold#8F6C3E143, 108, 62Curated design name 
Olden Amber#EEB76B238, 183, 107Curated design name 

 

Olive Through Op

This group starts with Oleander and continues through Opulent Purple, covering the Olive, On, Onion, Opal, Open, Opera, and Opulent name clusters.

NameHEXRGBStatusColor
Oleander#F2CCC5242, 204, 197Curated design name 
Oleander Pink#F85898248, 88, 152Curated design name 
Olive#808000128, 128, 0CSS keyword: olive 
Olive Bark#5F553795, 85, 55Curated design name 
Olive Branch#646A45100, 106, 69Curated design name 
Olive Brown#645403100, 84, 3Curated design name 
Olive Drab#6B8E23107, 142, 35CSS keyword: olivedrab 
Olive Grove#716A4D113, 106, 77Curated design name 
Olive Leaf#4E4B3578, 75, 53Curated design name 
Olive Oil#BAB86C186, 184, 108Curated design name 
Olivine#9AB973154, 185, 115Curated design name 
Ombre Blue#4A4E5D74, 78, 93Curated design name 
Ombre Grey#848998132, 137, 152Curated design name 
Omphalodes#B5CEDF181, 206, 223Curated design name 
On Cloud Nine#C2E7E8194, 231, 232Curated design name 
On the Rocks#D0CEC8208, 206, 200Curated design name 
On Thin Ice#D1E8F1209, 232, 241Curated design name 
Onahau#C2E6EC194, 230, 236Curated design name 
Once Bitten#BD2F10189, 47, 16Curated design name 
Once in a Blue Moon#0044BB0, 68, 187Curated design name 
One Minute to Midnight#0033880, 51, 136Curated design name 
Onion#48412B72, 65, 43Curated design name 
Onion Powder#ECE2D4236, 226, 212Curated design name 
Onion Skin#EEEDDF238, 237, 223Curated design name 
Ontario Violet#777CB0119, 124, 176Curated design name 
Onyx#46454470, 69, 68Curated design name 
Opal#AEE0E4174, 224, 228Curated design name 
Opal Cream#FCEECE252, 238, 206Curated design name 
Opal Flame#E95C4B233, 92, 75Curated design name 
Opal Green#15795421, 121, 84Curated design name 
Opal Grey#9A9394154, 147, 148Curated design name 
Opal Turquoise#96D1C3150, 209, 195Curated design name 
Opal Violet#7E8FBB126, 143, 187Curated design name 
Opalescent Coral#FFD2A9255, 210, 169Curated design name 
Opaline#C1D1C4193, 209, 196Curated design name 
Opaline Green#A3C57D163, 197, 125Curated design name 
Opaline Pink#C6A0AB198, 160, 171Curated design name 
Open Air#C7DFE0199, 223, 224Curated design name 
Open Book#F5F1E5245, 241, 229Curated design name 
Open Seas#83AFBC131, 175, 188Curated design name 
Open Sesame#F8E2A9248, 226, 169Curated design name 
Opera Blue#453E6E69, 62, 110Curated design name 
Opera Mauve#B784A7183, 132, 167Curated design name 
Opera Red#FF1B2D255, 27, 45Curated design name 
Optimist Gold#E9AB51233, 171, 81Curated design name 
Optimum Blue#465A7F70, 90, 127Curated design name 
Opulent Orange#F16640241, 102, 64Curated design name 
Opulent Purple#673362103, 51, 98Curated design name 

 

Orange and Orchid Colors

This group begins with Oracle, follows the Orange entries, and closes with the Orchid entries while preserving the established sequence.

NameHEXRGBStatusColor
Oracle#39555557, 85, 85Curated design name 
Orange#FFA500255, 165, 0CSS keyword: orange 
Orange Aura#FF9682255, 150, 130Curated design name 
Orange Brown#B16002177, 96, 2Curated design name 
Orange Burst#FF6E3A255, 110, 58Curated design name 
Orange Canyon#FDD1A4253, 209, 164Curated design name 
Orange Caramel#DE954B222, 149, 75Curated design name 
Orange Chalk#FAD48B250, 212, 139Curated design name 
Orange Chiffon#F9AE7D249, 174, 125Curated design name 
Orange Clay#E6A57F230, 165, 127Curated design name 
Orange Crush#EE7733238, 119, 51Curated design name 
Orange Daylily#EB7D5D235, 125, 93Curated design name 
Orange Dusk#FE4C40254, 76, 64Curated design name 
Orange Glow#FFE2BD255, 226, 189Curated design name 
Orange Ice#FFDEC1255, 222, 193Curated design name 
Orange Juice#FF7F00255, 127, 0Curated design name 
Orange Marmalade#FAAC72250, 172, 114Curated design name 
Orange Ochre#DA7631218, 118, 49Curated design name 
Orange Peel#FFA000255, 160, 0Curated design name 
Orange Pink#FF6F52255, 111, 82Curated design name 
Orange Red#FF4500255, 69, 0CSS keyword: orangered 
Orange Sherbet#FEC49B254, 196, 155Curated design name 
Orange Soda#FA5B3D250, 91, 61Curated design name 
Orange Spice#FEA060254, 160, 96Curated design name 
Orange Wood#B74923183, 73, 35Curated design name 
Orange Zest#F07227240, 114, 39Curated design name 
Orchid#DA70D6218, 112, 214CSS keyword: orchid 
Orchid Bloom#C5AECF197, 174, 207Curated design name 
Orchid Haze#B0879B176, 135, 155Curated design name 
Orchid Kiss#AC74A4172, 116, 164Curated design name 
Orchid White#F1EBD9241, 235, 217Curated design name 

 

Or Through Ozone

The final group runs from Oregano through Ozone Blue and completes the 240-name alphabetical sequence.

NameHEXRGBStatusColor
Oregano#7F8353127, 131, 83Curated design name 
Organic Green#7FAC6E127, 172, 110Curated design name 
Organza#FFDEA6255, 222, 166Curated design name 
Orion Blue#40525F64, 82, 95Curated design name 
Outer Space#314E6449, 78, 100Curated design name 
Outrageous Orange#FF6E4A255, 110, 74Curated design name 
Overcast Sky#A7B8C4167, 184, 196Curated design name 
Oxblood#800020128, 0, 32Curated design name 
Oxford Blue#0021470, 33, 71Curated design name 
Oxide#BF7657191, 118, 87Curated design name 
Oyster#E3D3BF227, 211, 191Curated design name 
Oyster Pink#D4B5B0212, 181, 176Curated design name 
Ozone Blue#C7D3E0199, 211, 224Curated design name 

 

 

How to Use These O Colors in Design

A name helps people discuss a color, but the HEX value tells digital tools which sRGB color to display. Begin with the job the color must perform, then evaluate its exact value in the intended setting.

Colors That Start With O — Material studyAI-generated editorial illustration; not a measured color sample.

 

Choosing Between a CSS Keyword and a HEX Value

Use one of the six standardized identifiers when readable code and established CSS behavior are useful. For example, color: orange; and color: #FFA500; describe the same digital color. Multiword display names require the unspaced tokens oldlace, olivedrab, and orangered.

HEX is clearer for every catalog entry because it preserves the intended value even if another source interprets the name differently. Keep the code in design tokens, style guides, or asset notes. Oxford Blue can remain the human-friendly label, while #002147 prevents ambiguity.

 

Checking Text and Background Contrast

Do not infer readability from a name, hue family, or first glance at a swatch. Calculate the contrast ratio between the exact foreground and background values. WCAG 2.2 sets a minimum of 4.5:1 for ordinary text and 3:1 for large text. Large text means at least 18 point, equivalent to 24 CSS pixels, at regular weight, or at least 14 point, about 18.7 CSS pixels, when bold. Do not round a failing result upward.

Run the check again whenever either color changes. The same orange may pass against one dark blue and fail against a pale cream, so accessibility belongs to the pair rather than either color alone.

 

Building a Palette Without Overloading It

Assign colors jobs before adding more of them. A restrained neutral can cover the largest surfaces, a darker O color can organize text or structure, and a stronger orange, orchid, or ocean tone can mark actions and focal points. This role-based approach is more useful than treating every appealing swatch as an equal accent.

A guide to complementary colors can help locate strong hue oppositions, while these practical color combinations offer broader palette ideas. Preserve the selected HEX values and test the finished palette in context.

 

 

Screen Color, Print Color, and Physical Materials

The table is a digital sRGB reference. Its swatches do not promise an identical result from ink, paint, dye, stone, or another physical material.

 

Why HEX Does Not Define a Paint Color

A six-digit HEX code specifies red, green, and blue channel values in the sRGB screen color space. Paint creates color through physical materials and reflected light, so a screen code is not a mixing recipe or measured paint specification. For pigment work, consult guidance on mixing colors and evaluate real samples under the light in which they will be seen.

The same caution applies to material-inspired names such as Opal, Obsidian, Oyster, and Oxblood. Each listed swatch is a selected digital reference, not a claim that every specimen or material has that appearance.

 

Why CMYK Needs a Print Profile

Displays and printers cannot always reproduce the same range of colors. A print workflow may need gamut mapping, which adjusts a screen color to fit the range a printer can produce. The result also changes with the paper or other printing surface, measurements describing the printer and ink setup, and the method used to divide RGB color among cyan, magenta, yellow, and black inks.

That is why the atlas does not include a generic CMYK column. Choose the intended printer and paper, obtain the appropriate International Color Consortium (ICC) output profile for that setup, convert within a color-managed workflow, and assess a proof rather than relying on an unprofiled four-number conversion.

 

Ochre as a Material, Not One Fixed Swatch

The table gives Ochre the selected digital reference #CC7722, but physical ochres are materials rather than screen coordinates. A documented red ochre sample examined in conservation research contained fine hematite and quartz, showing how mineral composition can sit behind the visible color.

A digital ochre is useful for interface design, illustration, and palette planning. It cannot describe every ochre deposit, prepared pigment, binder mixture, surface, or aged paint layer.

 

 

Frequently Asked Questions

These answers clarify the atlas’s scope, the six CSS identifiers, and the limits of using digital swatches for accessibility checks or paint mixing.

 

How Many Colors Start With O?

This curated atlas contains 240 distinct O-initial names. It does not claim that English has exactly 240, since non-standard design catalogs can adopt additional labels and associations.

 

Which O Colors Are Official CSS Names?

The six standardized display names are Old Lace, Olive, Olive Drab, Orange, Orange Red, and Orchid. Their literal CSS identifiers are oldlace, olive, olivedrab, orange, orangered, and orchid.

 

Is Oxford Blue Always the Same HEX Value?

No. Oxford Blue is a descriptive catalog name here, not a standardized CSS keyword. This atlas associates it with #002147, so keep that code attached whenever the exact digital value matters.

 

Can I Use These HEX Codes to Mix Paint?

No. They can provide a visual starting point on an sRGB screen, but they do not specify pigments, proportions, binders, opacity, or lighting. Compare physical mixtures and dried samples instead.

 

How Do I Know Whether an O Color Is Accessible?

Test its exact HEX value against the exact neighboring background or foreground. Use at least 4.5:1 for ordinary text. The 3:1 threshold applies only to text at least 18 point, or at least 14 point when bold, and a failing result must not be rounded upward.

 

Download the digital color reference sheets: Color atlas 1 · Color atlas 2 · Color atlas 3 · Color atlas 4 · Color atlas 5 · Color atlas 6 · Color atlas 7

 

Cite this Article

Matthew, Matthysen, “Colors That Start With O: 240 Color Names and HEX Codes.” Art in Context. October 21, 2026. URL: https://artincontext.org/colors-that-start-with-o/

Matthysen, M. (2026, 21 October). Colors That Start With O: 240 Color Names and HEX Codes. Art in Context. https://artincontext.org/colors-that-start-with-o/

Matthysen, Matthew. “Colors That Start With O: 240 Color Names and HEX Codes.” Art in Context, October 21, 2026. https://artincontext.org/colors-that-start-with-o/.

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *