Colors Encyclopedia

HEX atlas value

#21520A

#21520A is a cool green HEX color close to Terre Verte. According to Colors Encyclopedia, it converts to RGB 33, 82, 10, HSL 101, 78%, 18%, has luminance 0.0638, and belongs to the dark and jewel tone groups.

greencooldarkjewel-tone
#21520A Sample readable text
HEX #21520A
RGB rgb(33, 82, 10)
HSL hsl(101 78% 18%)
CMYK cmyk(60, 0, 88, 68)
Luminance 0.0638
Contrast Black 2.28:1White 9.23:1

CSS

--color-21520a: #21520A;
.background-21520a { background-color: #21520A; }
.text-21520a { color: #21520A; }

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
Luminance0.0638
Black text2.28:1AA Fail
White text9.23:1AA 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":"#21520A","rgb":[33,82,10],"hsl":[101,78,18],"cmyk":[60,0,88,68],"luminance":0.0638,"contrast":{"black":2.28,"white":9.23}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":2.28,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":9.23,"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":"#3B0A52","hex":"#3B0A52","family":"purple","bestTextColor":"#FFFFFF","contrastBlack":1.35,"contrastWhite":15.53,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"British Racing Green","hex":"#004225","family":"green","bestTextColor":"#FFFFFF","contrastBlack":1.81,"contrastWhite":11.63,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#244814","hex":"#244814","family":"green","bestTextColor":"#FFFFFF","contrastBlack":2.01,"contrastWhite":10.44,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#0A5217","hex":"#0A5217","family":"green","bestTextColor":"#FFFFFF","contrastBlack":2.23,"contrastWhite":9.41,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["cool green","dark","jewel tone","dark green","jewel tone green","Terre Verte 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/21520a.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/terre-verte.json","https://www.colorsencyclopedia.com/api/colors/emerald-dark.json","https://www.colorsencyclopedia.com/api/colors/dark-green.json"]}
Harmonies
{"complementary":"#3B0A52","analogous":["#45520A","#0A5217"],"triadic":["#0A2152","#520A21"],"tetradic":["#0A4552","#3B0A52","#52170A"],"splitComplementary":["#170A52","#520A45"],"monochromatic":["#42A314","#21520A","#000000"]}
Variants
{"light":"#42A314","dark":"#000000","saturated":"#1D5C00","desaturated":"#244814","pastel":"#54B329","neon":"#2A8500"}
Nearest named colors
[{"slug":"terre-verte","name":"Terre Verte","hex":"#385E0F","distance":26.419689627245813},{"slug":"emerald-dark","name":"Emerald Dark","hex":"#046307","distance":33.74907406137241},{"slug":"dark-green","name":"Dark Green","hex":"#006400","distance":38.897300677553446},{"slug":"british-racing-green","name":"British Racing Green","hex":"#004225","distance":45.5411901469428},{"slug":"moss-deep","name":"Moss Deep","hex":"#4A5D23","distance":49.26459174701441}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #21520A

#21520A is classified as a cool green value with dark and jewel tone visual character. #21520A is visually closest to Terre Verte, a named green color with HEX #385E0F.

The RGB channels are 33, 82, and 10, with green carrying the strongest channel weight. In HSL, the hue is 101deg with 78% saturation and 18% 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 0.0638, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 26.42, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text2.28:1AA Fail
White text9.23:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #21520A needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000002.28:1 · Fail
White text#FFFFFF9.23:1 · AAA

Accessible Alternatives

Black#FFFFFF text · best 21:1#000000
#3B0A52#FFFFFF text · best 15.53:1#3B0A52
British Racing Green#FFFFFF text · best 11.63:1#004225
#244814#FFFFFF text · best 10.44:1#244814
#0A5217#FFFFFF text · best 9.41:1#0A5217

Generated Palette

#21520A#21520A
#3B0A52#3B0A52
#45520A#45520A
#0A5217#0A5217
#42A314#42A314
Black#000000

Color Harmonies

#3B0A52#3B0A52
#45520A#45520A
#0A5217#0A5217
#0A2152#0A2152
#520A21#520A21

Variants

#42A314#42A314
Black#000000
#1D5C00#1D5C00
#244814#244814
#54B329#54B329
#2A8500#2A8500

Nearest Named Colors

Terre Verte#385E0F
Emerald Dark#046307
Dark Green#006400
British Racing Green#004225
Moss Deep#4A5D23

Related HEX Guides

Terre Verte colorOpen the nearest named color reference for #385E0F.Emerald Dark colorOpen the nearest named color reference for #046307.Dark Green colorOpen the nearest named color reference for #006400.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.#21520A APIOpen the machine-readable JSON record for this HEX value.