HEX atlas value

#81B80A

#81B80A is a cool green HEX color close to Acid Green. According to Colors Encyclopedia, it converts to RGB 129, 184, 10, HSL 79, 90%, 38%, has luminance 0.3897, and belongs to the vibrant and jewel tone groups.

green cool vibrant jewel-tone

#81B80A Sample readable text

HEX #81B80A

RGB rgb(129, 184, 10)

HSL hsl(79 90% 38%)

CMYK cmyk(30, 0, 95, 28)

Luminance 0.3897

Contrast Black 8.79:1White 2.39:1

CSS

--color-81b80a: #81B80A;
.background-81b80a { background-color: #81B80A; }
.text-81b80a { color: #81B80A; }

Luminance0.3897

Black text8.79:1AA Pass

White text2.39:1AA Fail

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

Structured sections

Color systems

{"hex":"#81B80A","rgb":[129,184,10],"hsl":[79,90,38],"cmyk":[30,0,95,28],"luminance":0.3897,"contrast":{"black":8.79,"white":2.39}}

WCAG

{"AA":["#000000","#1A1A1A"],"AAA":["#000000","#1A1A1A"]}

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":8.79,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.39,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#B4F42A","hex":"#B4F42A","family":"green","bestTextColor":"#000000","contrastBlack":15.91,"contrastWhite":1.32,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Yellow Green","hex":"#9ACD32","family":"green","bestTextColor":"#000000","contrastBlack":11.15,"contrastWhite":1.88,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#410AB8","hex":"#410AB8","family":"purple","bestTextColor":"#FFFFFF","contrastBlack":1.96,"contrastWhite":10.71,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Acid Green","hex":"#B0BF1A","family":"yellow","bestTextColor":"#000000","contrastBlack":10.31,"contrastWhite":2.04,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#84C200","hex":"#84C200","family":"green","bestTextColor":"#000000","contrastBlack":9.7,"contrastWhite":2.17,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","vibrant","jewel tone","vibrant green","jewel tone green","Acid Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","rich accent palettes","high-energy accents","botanical and wellness palettes"],"contrastSafeWith":["#000000","#1A1A1A"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/81b80a.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/acid-green.json","https://www.colorsencyclopedia.com/api/colors/yellow-green.json","https://www.colorsencyclopedia.com/api/colors/olive-drab.json"]}

Harmonies

{"complementary":"#410AB8","analogous":["#B8980A","#2AB80A"],"triadic":["#0A81B8","#B80A81"],"tetradic":["#0AB898","#410AB8","#B80A2A"],"splitComplementary":["#0A2AB8","#980AB8"],"monochromatic":["#B4F42A","#81B80A","#446105"]}

Variants

{"light":"#B4F42A","dark":"#446105","saturated":"#84C200","desaturated":"#79A31F","pastel":"#BBE75A","neon":"#A0EB00"}

Nearest named colors

[{"slug":"acid-green","name":"Acid Green","hex":"#B0BF1A","distance":50.1398045468867},{"slug":"yellow-green","name":"Yellow Green","hex":"#9ACD32","distance":51.633322573702344},{"slug":"olive-drab","name":"Olive Drab","hex":"#6B8E23","distance":53.600373133029585},{"slug":"olive-leaf","name":"Olive Leaf","hex":"#6B8E23","distance":53.600373133029585},{"slug":"kelly-green","name":"Kelly Green","hex":"#4CBB17","distance":54.653453687758834}]

HEX meaning and use

About #81B80A

#81B80A is classified as a cool green value with vibrant and jewel tone visual character. #81B80A is visually closest to Acid Green, a named yellow color with HEX #B0BF1A.

The RGB channels are 129, 184, and 10, with green carrying the strongest channel weight. In HSL, the hue is 79deg with 90% saturation and 38% lightness, so this page treats it as a high-saturation, mid-lightness 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 0.3897, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 50.14, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text8.79:1AA Pass

White text2.39:1AA Fail

AA text options: #000000, #1A1A1A.

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #81B80A needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000008.79:1 · AAA

White text#FFFFFF2.39:1 · Fail

Accessible Alternatives

#B4F42A#000000 text · best 15.91:1#B4F42A

Yellow Green#000000 text · best 11.15:1#9ACD32

#410AB8#FFFFFF text · best 10.71:1#410AB8

Acid Green#000000 text · best 10.31:1#B0BF1A

#84C200#000000 text · best 9.7:1#84C200

Generated Palette

#81B80A#81B80A

#410AB8#410AB8

#B8980A#B8980A

#2AB80A#2AB80A

#B4F42A#B4F42A

#446105#446105

Color Harmonies

#410AB8#410AB8

#B8980A#B8980A

#2AB80A#2AB80A

#0A81B8#0A81B8

#B80A81#B80A81

Variants

#B4F42A#B4F42A

#446105#446105

#84C200#84C200

#79A31F#79A31F

#BBE75A#BBE75A

#A0EB00#A0EB00

Nearest Named Colors

Acid Green#B0BF1A

Yellow Green#9ACD32

Olive Drab#6B8E23

Olive Leaf#6B8E23

Kelly Green#4CBB17

#81B80A

CSS

Machine-Readable HEX Data (JSON)

About #81B80A

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides