Colors Encyclopedia

HEX atlas value

#0A3D21

#0A3D21 is a cool green HEX color close to British Racing Green. According to Colors Encyclopedia, it converts to RGB 10, 61, 33, HSL 147, 72%, 14%, has luminance 0.0351, and belongs to the dark and jewel tone groups.

greencooldarkjewel-tone
#0A3D21 Sample readable text
HEX #0A3D21
RGB rgb(10, 61, 33)
HSL hsl(147 72% 14%)
CMYK cmyk(84, 0, 46, 76)
Luminance 0.0351
Contrast Black 1.7:1White 12.34:1

CSS

--color-0a3d21: #0A3D21;
.background-0a3d21 { background-color: #0A3D21; }
.text-0a3d21 { color: #0A3D21; }

Machine-readable data

Machine-Readable HEX Data (JSON)

Structured HEX color data for conversion, WCAG checks, CSS generation, automation, and AI ingestion.

AI-Ready Dataset v1.0.0
Luminance0.0351
Black text1.7:1AA Fail
White text12.34:1AA Pass
hexCanonical HEX value
rgbRed, green, blue channels
hslHue, saturation, lightness
cmykApproximate print conversion
wcagAA and AAA contrast options
harmoniesMathematical harmony sets
variantsGenerated tone variants
nearestColorsKnowledge graph neighbors
Download JSON Open API
Structured sections
Color systems
{"hex":"#0A3D21","rgb":[10,61,33],"hsl":[147,72,14],"cmyk":[84,0,46,76],"luminance":0.0351,"contrast":{"black":1.7,"white":12.34}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":1.7,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":12.34,"wcagAA":true,"wcagAAA":true}]
Accessible alternatives
[{"name":"Black","hex":"#000000","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1,"contrastWhite":21,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Carbon Fiber","hex":"#1C1C1C","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.23,"contrastWhite":17.05,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#3D0A26","hex":"#3D0A26","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":1.27,"contrastWhite":16.54,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Raisin","hex":"#242124","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.32,"contrastWhite":15.93,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Slate Black","hex":"#26282A","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.42,"contrastWhite":14.79,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["cool green","dark","jewel tone","dark green","jewel tone green","British Racing Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","rich accent palettes","dark theme accents","botanical and wellness palettes"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/0a3d21.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/british-racing-green.json","https://www.colorsencyclopedia.com/api/colors/slate-black.json","https://www.colorsencyclopedia.com/api/colors/charcoal-blue.json"]}
Harmonies
{"complementary":"#3D0A26","analogous":["#0D3D0A","#0A3D3B"],"triadic":["#210A3D","#3D210A"],"tetradic":["#0A0D3D","#3D0A26","#3D3B0A"],"splitComplementary":["#3B0A3D","#3D0A0D"],"monochromatic":["#178C4C","#0A3D21","#000000"]}
Variants
{"light":"#178C4C","dark":"#000000","saturated":"#024520","desaturated":"#123622","pastel":"#2B9C5E","neon":"#007032"}
Nearest named colors
[{"slug":"british-racing-green","name":"British Racing Green","hex":"#004225","distance":11.874342087037917},{"slug":"slate-black","name":"Slate Black","hex":"#26282A","distance":36.138621999185304},{"slug":"charcoal-blue","name":"Charcoal Blue","hex":"#263238","distance":37.86819245752297},{"slug":"carbon-fiber","name":"Carbon Fiber","hex":"#1C1C1C","distance":37.92097045171708},{"slug":"raisin","name":"Raisin","hex":"#242124","distance":38.3275357934736}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #0A3D21

#0A3D21 is classified as a cool green value with dark and jewel tone visual character. #0A3D21 is visually closest to British Racing Green, a named green color with HEX #004225.

The RGB channels are 10, 61, and 33, with green carrying the strongest channel weight. In HSL, the hue is 147deg with 72% saturation and 14% lightness, so this page treats it as a high-saturation, dark atlas color rather than a generic swatch.

According to Colors Encyclopedia, this HEX value works best for color conversion, WCAG contrast checks, CSS color tokens, and rich accent palettes. Its luminance is 0.0351, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 11.87, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text1.7:1AA Fail
White text12.34:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #0A3D21 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.7:1 · Fail
White text#FFFFFF12.34:1 · AAA

Accessible Alternatives

Black#FFFFFF text · best 21:1#000000
Carbon Fiber#FFFFFF text · best 17.05:1#1C1C1C
#3D0A26#FFFFFF text · best 16.54:1#3D0A26
Raisin#FFFFFF text · best 15.93:1#242124
Slate Black#FFFFFF text · best 14.79:1#26282A

Generated Palette

#0A3D21#0A3D21
#3D0A26#3D0A26
#0D3D0A#0D3D0A
#0A3D3B#0A3D3B
#178C4C#178C4C
Black#000000

Color Harmonies

#3D0A26#3D0A26
#0D3D0A#0D3D0A
#0A3D3B#0A3D3B
#210A3D#210A3D
#3D210A#3D210A

Variants

#178C4C#178C4C
Black#000000
#024520#024520
#123622#123622
#2B9C5E#2B9C5E
#007032#007032

Nearest Named Colors

British Racing Green#004225
Slate Black#26282A
Charcoal Blue#263238
Carbon Fiber#1C1C1C
Raisin#242124

Related HEX Guides

British Racing Green colorOpen the nearest named color reference for #004225.Slate Black colorOpen the nearest named color reference for #26282A.Charcoal Blue colorOpen the nearest named color reference for #263238.Green color familyBrowse named green colors related to this HEX value.Cool colorsExplore colors with similar temperature behavior.Dark colorsFind colors in the dark group.Jewel Tone colorsFind colors in the jewel tone group.Color palettesBrowse palette systems related to generated color combinations.Compare colorsCompare named colors near this HEX value.Accessible colorsBrowse WCAG-friendly named colors and safe text options.#0A3D21 APIOpen the machine-readable JSON record for this HEX value.