HEX atlas value

#81B210

#81B210 is a cool green HEX color close to Olive Drab. According to Colors Encyclopedia, it converts to RGB 129, 178, 16, HSL 78, 84%, 38%, has luminance 0.3655, and belongs to the vibrant and jewel tone groups.

green cool vibrant jewel-tone

#81B210 Sample readable text

HEX #81B210

RGB rgb(129, 178, 16)

HSL hsl(78 84% 38%)

CMYK cmyk(28, 0, 91, 30)

Luminance 0.3655

Contrast Black 8.31:1White 2.53:1

CSS

--color-81b210: #81B210;
.background-81b210 { background-color: #81B210; }
.text-81b210 { color: #81B210; }

Luminance0.3655

Black text8.31:1AA Pass

White text2.53:1AA 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":"#81B210","rgb":[129,178,16],"hsl":[78,84,38],"cmyk":[28,0,91,30],"luminance":0.3655,"contrast":{"black":8.31,"white":2.53}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":8.31,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.53,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#B4ED31","hex":"#B4ED31","family":"green","bestTextColor":"#000000","contrastBlack":15.1,"contrastWhite":1.39,"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":"#4010B2","hex":"#4010B2","family":"purple","bestTextColor":"#FFFFFF","contrastBlack":1.93,"contrastWhite":10.86,"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":"#88C200","hex":"#88C200","family":"green","bestTextColor":"#000000","contrastBlack":9.76,"contrastWhite":2.15,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","vibrant","jewel tone","vibrant green","jewel tone green","Olive Drab 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/81b210.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/olive-drab.json","https://www.colorsencyclopedia.com/api/colors/olive-leaf.json","https://www.colorsencyclopedia.com/api/colors/acid-green.json"]}

Harmonies

{"complementary":"#4010B2","analogous":["#B29210","#30B210"],"triadic":["#1081B2","#B21081"],"tetradic":["#10B292","#4010B2","#B21030"],"splitComplementary":["#1030B2","#9210B2"],"monochromatic":["#B4ED31","#81B210","#445E08"]}

Variants

{"light":"#B4ED31","dark":"#445E08","saturated":"#88C200","desaturated":"#799D25","pastel":"#BBE260","neon":"#A4EB00"}

Nearest named colors

[{"slug":"olive-drab","name":"Olive Drab","hex":"#6B8E23","distance":46.2709412050371},{"slug":"olive-leaf","name":"Olive Leaf","hex":"#6B8E23","distance":46.2709412050371},{"slug":"acid-green","name":"Acid Green","hex":"#B0BF1A","distance":49.77951385861457},{"slug":"yellow-green","name":"Yellow Green","hex":"#9ACD32","distance":50.0999001995014},{"slug":"olive","name":"Olive","hex":"#808000","distance":52.507142371300304}]

HEX meaning and use

About #81B210

#81B210 is classified as a cool green value with vibrant and jewel tone visual character. #81B210 is visually closest to Olive Drab, a named green color with HEX #6B8E23.

The RGB channels are 129, 178, and 16, with green carrying the strongest channel weight. In HSL, the hue is 78deg with 84% 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 0.3655, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 46.27, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text8.31:1AA Pass

White text2.53:1AA Fail

AA text options: #000000, #1A1A1A.

AAA text options: #000000.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #81B210 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000008.31:1 · AAA

White text#FFFFFF2.53:1 · Fail

Accessible Alternatives

#B4ED31#000000 text · best 15.1:1#B4ED31

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

#4010B2#FFFFFF text · best 10.86:1#4010B2

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

#88C200#000000 text · best 9.76:1#88C200

Generated Palette

#81B210#81B210

#4010B2#4010B2

#B29210#B29210

#30B210#30B210

#B4ED31#B4ED31

#445E08#445E08

Color Harmonies

#4010B2#4010B2

#B29210#B29210

#30B210#30B210

#1081B2#1081B2

#B21081#B21081

Variants

#B4ED31#B4ED31

#445E08#445E08

#88C200#88C200

#799D25#799D25

#BBE260#BBE260

#A4EB00#A4EB00

Nearest Named Colors

Olive Drab#6B8E23

Olive Leaf#6B8E23

Acid Green#B0BF1A

Yellow Green#9ACD32

Olive#808000

#81B210

CSS

Machine-Readable HEX Data (JSON)

About #81B210

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides