HEX atlas value

#51B54A

#51B54A is a cool green HEX color close to Medium Sea Green. According to Colors Encyclopedia, it converts to RGB 81, 181, 74, HSL 116, 42%, 50%, has luminance 0.3529, and belongs to the earth tone group.

green cool earth-tone

#51B54A Sample readable text

HEX #51B54A

RGB rgb(81, 181, 74)

HSL hsl(116 42% 50%)

CMYK cmyk(55, 0, 59, 29)

Luminance 0.3529

Contrast Black 8.06:1White 2.61:1

CSS

--color-51b54a: #51B54A;
.background-51b54a { background-color: #51B54A; }
.text-51b54a { color: #51B54A; }

Luminance0.3529

Black text8.06:1AA Pass

White text2.61:1AA 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":"#51B54A","rgb":[81,181,74],"hsl":[116,42,50],"cmyk":[55,0,59,29],"luminance":0.3529,"contrast":{"black":8.06,"white":2.61}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":8.06,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.61,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#90D08B","hex":"#90D08B","family":"green","bestTextColor":"#000000","contrastBlack":11.58,"contrastWhite":1.81,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#39D12E","hex":"#39D12E","family":"green","bestTextColor":"#000000","contrastBlack":10.33,"contrastWhite":2.03,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Lime Green","hex":"#32CD32","family":"green","bestTextColor":"#000000","contrastBlack":9.91,"contrastWhite":2.12,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Paris Green","hex":"#50C878","family":"green","bestTextColor":"#000000","contrastBlack":9.87,"contrastWhite":2.13,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#87B54A","hex":"#87B54A","family":"green","bestTextColor":"#000000","contrastBlack":8.74,"contrastWhite":2.4,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","earth tone","earth tone green","Medium Sea Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes","botanical and wellness palettes"],"contrastSafeWith":["#000000","#1A1A1A"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/51b54a.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/medium-sea-green.json","https://www.colorsencyclopedia.com/api/colors/epoxy-green.json","https://www.colorsencyclopedia.com/api/colors/lime-green.json"]}

Harmonies

{"complementary":"#AE4AB5","analogous":["#87B54A","#4AB578"],"triadic":["#4A51B5","#B54A51"],"tetradic":["#4A87B5","#AE4AB5","#B5784A"],"splitComplementary":["#784AB5","#B54A87"],"monochromatic":["#90D08B","#51B54A","#34742F"]}

Variants

{"light":"#90D08B","dark":"#34742F","saturated":"#39D12E","desaturated":"#699966","pastel":"#B0D0AE","neon":"#37FF29"}

Nearest named colors

[{"slug":"medium-sea-green","name":"Medium Sea Green","hex":"#3CB371","distance":44.339598554790726},{"slug":"epoxy-green","name":"Epoxy Green","hex":"#4E8A57","distance":45.02221673796171},{"slug":"lime-green","name":"Lime Green","hex":"#32CD32","distance":45.967379738244816},{"slug":"emerald","name":"Emerald","hex":"#50C878","distance":49.77951385861457},{"slug":"paris-green","name":"Paris Green","hex":"#50C878","distance":49.77951385861457}]

HEX meaning and use

About #51B54A

#51B54A is classified as a cool green value with earth tone visual character. #51B54A is visually closest to Medium Sea Green, a named green color with HEX #3CB371.

The RGB channels are 81, 181, and 74, with green carrying the strongest channel weight. In HSL, the hue is 116deg with 42% saturation and 50% lightness, so this page treats it as a moderate-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 natural palettes. Its luminance is 0.3529, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 44.34, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text8.06:1AA Pass

White text2.61:1AA Fail

AA text options: #000000, #1A1A1A.

AAA text options: #000000.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #51B54A needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000008.06:1 · AAA

White text#FFFFFF2.61:1 · Fail

Accessible Alternatives

#90D08B#000000 text · best 11.58:1#90D08B

#39D12E#000000 text · best 10.33:1#39D12E

Lime Green#000000 text · best 9.91:1#32CD32

Paris Green#000000 text · best 9.87:1#50C878

#87B54A#000000 text · best 8.74:1#87B54A

Generated Palette

#51B54A#51B54A

#AE4AB5#AE4AB5

#87B54A#87B54A

#4AB578#4AB578

#90D08B#90D08B

#34742F#34742F

Color Harmonies

#AE4AB5#AE4AB5

#87B54A#87B54A

#4AB578#4AB578

#4A51B5#4A51B5

#B54A51#B54A51

Variants

#90D08B#90D08B

#34742F#34742F

#39D12E#39D12E

#699966#699966

#B0D0AE#B0D0AE

#37FF29#37FF29

Nearest Named Colors

Medium Sea Green#3CB371

Epoxy Green#4E8A57

Lime Green#32CD32

Emerald#50C878

Paris Green#50C878

#51B54A

CSS

Machine-Readable HEX Data (JSON)

About #51B54A

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides