HEX atlas value

#51AB2B

#51AB2B is a cool green HEX color close to Kelly Green. According to Colors Encyclopedia, it converts to RGB 81, 171, 43, HSL 102, 60%, 42%, has luminance 0.3105, and belongs to the earth tone and jewel tone groups.

green cool earth-tone jewel-tone

#51AB2B Sample readable text

HEX #51AB2B

RGB rgb(81, 171, 43)

HSL hsl(102 60% 42%)

CMYK cmyk(53, 0, 75, 33)

Luminance 0.3105

Contrast Black 7.21:1White 2.91:1

CSS

--color-51ab2b: #51AB2B;
.background-51ab2b { background-color: #51AB2B; }
.text-51ab2b { color: #51AB2B; }

Luminance0.3105

Black text7.21:1AA Pass

White text2.91:1AA 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":"#51AB2B","rgb":[81,171,43],"hsl":[102,60,42],"cmyk":[53,0,75,33],"luminance":0.3105,"contrast":{"black":7.21,"white":2.91}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":7.21,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.91,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#81D65C","hex":"#81D65C","family":"green","bestTextColor":"#000000","contrastBlack":11.71,"contrastWhite":1.79,"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":"#48C313","hex":"#48C313","family":"green","bestTextColor":"#000000","contrastBlack":9.09,"contrastWhite":2.31,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Kelly Green","hex":"#4CBB17","family":"green","bestTextColor":"#000000","contrastBlack":8.43,"contrastWhite":2.49,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#92AB2B","hex":"#92AB2B","family":"green","bestTextColor":"#000000","contrastBlack":8.08,"contrastWhite":2.6,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]}]

AI context

{"semanticGroups":["cool green","earth tone","jewel tone","earth tone green","jewel tone green","Kelly Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes","rich accent palettes","botanical and wellness palettes"],"contrastSafeWith":["#000000","#1A1A1A"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/51ab2b.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/kelly-green.json","https://www.colorsencyclopedia.com/api/colors/olive-drab.json","https://www.colorsencyclopedia.com/api/colors/olive-leaf.json"]}

Harmonies

{"complementary":"#852BAB","analogous":["#92AB2B","#2BAB45"],"triadic":["#2B51AB","#AB2B51"],"tetradic":["#2B92AB","#852BAB","#AB452B"],"splitComplementary":["#452BAB","#AB2B92"],"monochromatic":["#81D65C","#51AB2B","#2F6218"]}

Variants

{"light":"#81D65C","dark":"#2F6218","saturated":"#48C313","desaturated":"#5B9442","pastel":"#9CD185","neon":"#4CFF00"}

Nearest named colors

[{"slug":"kelly-green","name":"Kelly Green","hex":"#4CBB17","distance":26.095976701399778},{"slug":"olive-drab","name":"Olive Drab","hex":"#6B8E23","distance":39.761790704142086},{"slug":"olive-leaf","name":"Olive Leaf","hex":"#6B8E23","distance":39.761790704142086},{"slug":"lime-green","name":"Lime Green","hex":"#32CD32","distance":46.54030511288038},{"slug":"olive-green","name":"Olive Green","hex":"#708238","distance":53.018864567246254}]

HEX meaning and use

About #51AB2B

#51AB2B is classified as a cool green value with earth tone and jewel tone visual character. #51AB2B is visually closest to Kelly Green, a named green color with HEX #4CBB17.

The RGB channels are 81, 171, and 43, with green carrying the strongest channel weight. In HSL, the hue is 102deg with 60% saturation and 42% 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 0.3105, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 26.10, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text7.21:1AA Pass

White text2.91:1AA Fail

AA text options: #000000, #1A1A1A.

AAA text options: #000000.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #51AB2B needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000007.21:1 · AAA

White text#FFFFFF2.91:1 · Fail

Accessible Alternatives

#81D65C#000000 text · best 11.71:1#81D65C

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

#48C313#000000 text · best 9.09:1#48C313

Kelly Green#000000 text · best 8.43:1#4CBB17

#92AB2B#000000 text · best 8.08:1#92AB2B

Generated Palette

#51AB2B#51AB2B

#852BAB#852BAB

#92AB2B#92AB2B

#2BAB45#2BAB45

#81D65C#81D65C

#2F6218#2F6218

Color Harmonies

#852BAB#852BAB

#92AB2B#92AB2B

#2BAB45#2BAB45

#2B51AB#2B51AB

#AB2B51#AB2B51

Variants

#81D65C#81D65C

#2F6218#2F6218

#48C313#48C313

#5B9442#5B9442

#9CD185#9CD185

#4CFF00#4CFF00

Nearest Named Colors

Kelly Green#4CBB17

Olive Drab#6B8E23

Olive Leaf#6B8E23

Lime Green#32CD32

Olive Green#708238

#51AB2B

CSS

Machine-Readable HEX Data (JSON)

About #51AB2B

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides