HEX atlas value

#51D11A

#51D11A is a cool green HEX color close to Kelly Green. According to Colors Encyclopedia, it converts to RGB 81, 209, 26, HSL 102, 78%, 46%, has luminance 0.4742, and belongs to the vibrant group.

green cool vibrant

#51D11A Sample readable text

HEX #51D11A

RGB rgb(81, 209, 26)

HSL hsl(102 78% 46%)

CMYK cmyk(61, 0, 88, 18)

Luminance 0.4742

Contrast Black 10.48:1White 2:1

CSS

--color-51d11a: #51D11A;
.background-51d11a { background-color: #51D11A; }
.text-51d11a { color: #51D11A; }

Luminance0.4742

Black text10.48:1AA Pass

White text2:1AA 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":"#51D11A","rgb":[81,209,26],"hsl":[102,78,46],"cmyk":[61,0,88,18],"luminance":0.4742,"contrast":{"black":10.48,"white":2}}

WCAG

{"AA":["#000000","#1A1A1A","#36454F"],"AAA":["#000000","#1A1A1A"]}

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":10.48,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"Lawn Green","hex":"#7CFC00","family":"green","bestTextColor":"#000000","contrastBlack":15.78,"contrastWhite":1.33,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Neon Green","hex":"#39FF14","family":"green","bestTextColor":"#000000","contrastBlack":15.49,"contrastWhite":1.36,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#87EB5C","hex":"#87EB5C","family":"green","bestTextColor":"#000000","contrastBlack":14.07,"contrastWhite":1.49,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#46EB00","hex":"#46EB00","family":"green","bestTextColor":"#000000","contrastBlack":13.14,"contrastWhite":1.6,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Toxic Green","hex":"#61DE2A","family":"green","bestTextColor":"#000000","contrastBlack":11.99,"contrastWhite":1.75,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","vibrant","vibrant green","Kelly Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents","botanical and wellness palettes"],"contrastSafeWith":["#000000","#1A1A1A","#36454F"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/51d11a.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/kelly-green.json","https://www.colorsencyclopedia.com/api/colors/toxic-green.json","https://www.colorsencyclopedia.com/api/colors/lime-green.json"]}

Harmonies

{"complementary":"#9A1AD1","analogous":["#ACD11A","#1AD13E"],"triadic":["#1A51D1","#D11A51"],"tetradic":["#1AACD1","#9A1AD1","#D13E1A"],"splitComplementary":["#3E1AD1","#D11AAC"],"monochromatic":["#87EB5C","#51D11A","#317F10"]}

Variants

{"light":"#87EB5C","dark":"#317F10","saturated":"#46EB00","desaturated":"#5BB734","pastel":"#A2E486","neon":"#5BFF14"}

Nearest named colors

[{"slug":"kelly-green","name":"Kelly Green","hex":"#4CBB17","distance":22.759613353482084},{"slug":"toxic-green","name":"Toxic Green","hex":"#61DE2A","distance":26.095976701399778},{"slug":"lime-green","name":"Lime Green","hex":"#32CD32","distance":39.408120990476064},{"slug":"neon-green","name":"Neon Green","hex":"#39FF14","distance":52.230259428802384},{"slug":"lawn-green","name":"Lawn Green","hex":"#7CFC00","distance":66.1362230551458}]

HEX meaning and use

About #51D11A

#51D11A is classified as a cool green value with vibrant visual character. #51D11A is visually closest to Kelly Green, a named green color with HEX #4CBB17.

The RGB channels are 81, 209, and 26, with green carrying the strongest channel weight. In HSL, the hue is 102deg with 78% saturation and 46% 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 high-energy accents. Its luminance is 0.4742, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 22.76, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text10.48:1AA Pass

White text2:1AA Fail

AA text options: #000000, #1A1A1A, #36454F.

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #51D11A needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000010.48:1 · AAA

White text#FFFFFF2:1 · Fail

Accessible Alternatives

Lawn Green#000000 text · best 15.78:1#7CFC00

Neon Green#000000 text · best 15.49:1#39FF14

#87EB5C#000000 text · best 14.07:1#87EB5C

#46EB00#000000 text · best 13.14:1#46EB00

Toxic Green#000000 text · best 11.99:1#61DE2A

Generated Palette

#51D11A#51D11A

#9A1AD1#9A1AD1

#ACD11A#ACD11A

#1AD13E#1AD13E

#87EB5C#87EB5C

#317F10#317F10

Color Harmonies

#9A1AD1#9A1AD1

#ACD11A#ACD11A

#1AD13E#1AD13E

#1A51D1#1A51D1

#D11A51#D11A51

Variants

#87EB5C#87EB5C

#317F10#317F10

#46EB00#46EB00

#5BB734#5BB734

#A2E486#A2E486

#5BFF14#5BFF14

Nearest Named Colors

Kelly Green#4CBB17

Toxic Green#61DE2A

Lime Green#32CD32

Neon Green#39FF14

Lawn Green#7CFC00

#51D11A

CSS

Machine-Readable HEX Data (JSON)

About #51D11A

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides