HEX atlas value

#A9D11A

#A9D11A is a cool green HEX color close to Acid Green. According to Colors Encyclopedia, it converts to RGB 169, 209, 26, HSL 73, 78%, 46%, has luminance 0.5411, and belongs to the vibrant group.

green cool vibrant

#A9D11A Sample readable text

HEX #A9D11A

RGB rgb(169, 209, 26)

HSL hsl(73 78% 46%)

CMYK cmyk(19, 0, 88, 18)

Luminance 0.5411

Contrast Black 11.82:1White 1.78:1

CSS

--color-a9d11a: #A9D11A;
.background-a9d11a { background-color: #A9D11A; }
.text-a9d11a { color: #A9D11A; }

Luminance0.5411

Black text11.82:1AA Pass

White text1.78:1AA 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":"#A9D11A","rgb":[169,209,26],"hsl":[73,78,46],"cmyk":[19,0,88,18],"luminance":0.5411,"contrast":{"black":11.82,"white":1.78}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":11.82,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":1.78,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"Green Yellow","hex":"#ADFF2F","family":"green","bestTextColor":"#000000","contrastBlack":17.12,"contrastWhite":1.23,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#CCEB5C","hex":"#CCEB5C","family":"green","bestTextColor":"#000000","contrastBlack":15.61,"contrastWhite":1.35,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#B8EB00","hex":"#B8EB00","family":"green","bestTextColor":"#000000","contrastBlack":14.92,"contrastWhite":1.41,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Pear","hex":"#D1E231","family":"yellow","bestTextColor":"#000000","contrastBlack":14.63,"contrastWhite":1.44,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Yellow Green","hex":"#9ACD32","family":"green","bestTextColor":"#000000","contrastBlack":11.15,"contrastWhite":1.88,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","vibrant","vibrant green","Acid 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/a9d11a.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/acid-green.json","https://www.colorsencyclopedia.com/api/colors/peridot.json","https://www.colorsencyclopedia.com/api/colors/yellow-green.json"]}

Harmonies

{"complementary":"#411AD1","analogous":["#D19D1A","#4ED11A"],"triadic":["#1AA9D1","#D11AA9"],"tetradic":["#1AD19D","#411AD1","#D11A4E"],"splitComplementary":["#1A4ED1","#9D1AD1"],"monochromatic":["#CCEB5C","#A9D11A","#677F10"]}

Variants

{"light":"#CCEB5C","dark":"#677F10","saturated":"#B8EB00","desaturated":"#9BB734","pastel":"#CFE486","neon":"#CCFF14"}

Nearest named colors

[{"slug":"acid-green","name":"Acid Green","hex":"#B0BF1A","distance":19.313207915827967},{"slug":"peridot","name":"Peridot","hex":"#B4C424","distance":19.748417658131498},{"slug":"yellow-green","name":"Yellow Green","hex":"#9ACD32","distance":28.583211855912904},{"slug":"pear","name":"Pear","hex":"#D1E231","distance":49.17316341257699},{"slug":"green-yellow","name":"Green Yellow","hex":"#ADFF2F","distance":50.724747411889595}]

HEX meaning and use

About #A9D11A

#A9D11A is classified as a cool green value with vibrant visual character. #A9D11A is visually closest to Acid Green, a named yellow color with HEX #B0BF1A.

The RGB channels are 169, 209, and 26, with green carrying the strongest channel weight. In HSL, the hue is 73deg 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 0.5411, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 19.31, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text11.82:1AA Pass

White text1.78:1AA Fail

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

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #A9D11A needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000011.82:1 · AAA

White text#FFFFFF1.78:1 · Fail

Accessible Alternatives

Green Yellow#000000 text · best 17.12:1#ADFF2F

#CCEB5C#000000 text · best 15.61:1#CCEB5C

#B8EB00#000000 text · best 14.92:1#B8EB00

Pear#000000 text · best 14.63:1#D1E231

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

Generated Palette

#A9D11A#A9D11A

#411AD1#411AD1

#D19D1A#D19D1A

#4ED11A#4ED11A

#CCEB5C#CCEB5C

#677F10#677F10

Color Harmonies

#411AD1#411AD1

#D19D1A#D19D1A

#4ED11A#4ED11A

#1AA9D1#1AA9D1

#D11AA9#D11AA9

Variants

#CCEB5C#CCEB5C

#677F10#677F10

#B8EB00#B8EB00

#9BB734#9BB734

#CFE486#CFE486

#CCFF14#CCFF14

Nearest Named Colors

Acid Green#B0BF1A

Peridot#B4C424

Yellow Green#9ACD32

Pear#D1E231

Green Yellow#ADFF2F

#A9D11A

CSS

Machine-Readable HEX Data (JSON)

About #A9D11A

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides