HEX atlas value

#51B224

#51B224 is a cool green HEX color close to Kelly Green. According to Colors Encyclopedia, it converts to RGB 81, 178, 36, HSL 101, 66%, 42%, has luminance 0.3372, and belongs to the jewel tone group.

green cool jewel-tone

#51B224 Sample readable text

HEX #51B224

RGB rgb(81, 178, 36)

HSL hsl(101 66% 42%)

CMYK cmyk(54, 0, 80, 30)

Luminance 0.3372

Contrast Black 7.74:1White 2.71:1

CSS

--color-51b224: #51B224;
.background-51b224 { background-color: #51B224; }
.text-51b224 { color: #51B224; }

Luminance0.3372

Black text7.74:1AA Pass

White text2.71:1AA 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":"#51B224","rgb":[81,178,36],"hsl":[101,66,42],"cmyk":[54,0,80,30],"luminance":0.3372,"contrast":{"black":7.74,"white":2.71}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":7.74,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.71,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#80DC56","hex":"#80DC56","family":"green","bestTextColor":"#000000","contrastBlack":12.29,"contrastWhite":1.71,"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"]},{"name":"Lime Green","hex":"#32CD32","family":"green","bestTextColor":"#000000","contrastBlack":9.91,"contrastWhite":2.12,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#49C90D","hex":"#49C90D","family":"green","bestTextColor":"#000000","contrastBlack":9.64,"contrastWhite":2.18,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#98B224","hex":"#98B224","family":"green","bestTextColor":"#000000","contrastBlack":8.73,"contrastWhite":2.41,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","jewel tone","jewel tone green","Kelly Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","rich accent palettes","botanical and wellness palettes"],"contrastSafeWith":["#000000","#1A1A1A"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/51b224.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/kelly-green.json","https://www.colorsencyclopedia.com/api/colors/lime-green.json","https://www.colorsencyclopedia.com/api/colors/olive-drab.json"]}

Harmonies

{"complementary":"#8524B2","analogous":["#98B224","#24B23E"],"triadic":["#2451B2","#B22451"],"tetradic":["#2498B2","#8524B2","#B23E24"],"splitComplementary":["#3E24B2","#B22498"],"monochromatic":["#80DC56","#51B224","#2E6615"]}

Variants

{"light":"#80DC56","dark":"#2E6615","saturated":"#49C90D","desaturated":"#5A9A3C","pastel":"#9BD680","neon":"#51FF00"}

Nearest named colors

[{"slug":"kelly-green","name":"Kelly Green","hex":"#4CBB17","distance":16.583123951777},{"slug":"lime-green","name":"Lime Green","hex":"#32CD32","distance":43.42810150121693},{"slug":"olive-drab","name":"Olive Drab","hex":"#6B8E23","distance":44.41846462902562},{"slug":"olive-leaf","name":"Olive Leaf","hex":"#6B8E23","distance":44.41846462902562},{"slug":"toxic-green","name":"Toxic Green","hex":"#61DE2A","distance":47.20169488482379}]

HEX meaning and use

About #51B224

#51B224 is classified as a cool green value with jewel tone visual character. #51B224 is visually closest to Kelly Green, a named green color with HEX #4CBB17.

The RGB channels are 81, 178, and 36, with green carrying the strongest channel weight. In HSL, the hue is 101deg with 66% 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 rich accent palettes. Its luminance is 0.3372, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 16.58, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text7.74:1AA Pass

White text2.71:1AA Fail

AA text options: #000000, #1A1A1A.

AAA text options: #000000.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #51B224 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000007.74:1 · AAA

White text#FFFFFF2.71:1 · Fail

Accessible Alternatives

#80DC56#000000 text · best 12.29:1#80DC56

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

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

#49C90D#000000 text · best 9.64:1#49C90D

#98B224#000000 text · best 8.73:1#98B224

Generated Palette

#51B224#51B224

#8524B2#8524B2

#98B224#98B224

#24B23E#24B23E

#80DC56#80DC56

#2E6615#2E6615

Color Harmonies

#8524B2#8524B2

#98B224#98B224

#24B23E#24B23E

#2451B2#2451B2

#B22451#B22451

Variants

#80DC56#80DC56

#2E6615#2E6615

#49C90D#49C90D

#5A9A3C#5A9A3C

#9BD680#9BD680

#51FF00#51FF00

Nearest Named Colors

Kelly Green#4CBB17

Lime Green#32CD32

Olive Drab#6B8E23

Olive Leaf#6B8E23

Toxic Green#61DE2A

#51B224

CSS

Machine-Readable HEX Data (JSON)

About #51B224

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides