HEX atlas value

#78CA21

#78CA21 is a cool green HEX color close to Toxic Green. According to Colors Encyclopedia, it converts to RGB 120, 202, 33, HSL 89, 72%, 46%, has luminance 0.4634, and belongs to the vibrant group.

green cool vibrant

#78CA21 Sample readable text

HEX #78CA21

RGB rgb(120, 202, 33)

HSL hsl(89 72% 46%)

CMYK cmyk(41, 0, 84, 21)

Luminance 0.4634

Contrast Black 10.27:1White 2.05:1

CSS

--color-78ca21: #78CA21;
.background-78ca21 { background-color: #78CA21; }
.text-78ca21 { color: #78CA21; }

Luminance0.4634

Black text10.27:1AA Pass

White text2.05:1AA 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":"#78CA21","rgb":[120,202,33],"hsl":[89,72,46],"cmyk":[41,0,84,21],"luminance":0.4634,"contrast":{"black":10.27,"white":2.05}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":10.27,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.05,"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":"#A5E561","hex":"#A5E561","family":"green","bestTextColor":"#000000","contrastBlack":13.98,"contrastWhite":1.5,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#79E407","hex":"#79E407","family":"green","bestTextColor":"#000000","contrastBlack":12.91,"contrastWhite":1.63,"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":"#CAC721","hex":"#CAC721","family":"yellow","bestTextColor":"#000000","contrastBlack":11.7,"contrastWhite":1.79,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","vibrant","vibrant green","Toxic 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/78ca21.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/toxic-green.json","https://www.colorsencyclopedia.com/api/colors/yellow-green.json","https://www.colorsencyclopedia.com/api/colors/kelly-green.json"]}

Harmonies

{"complementary":"#7221CA","analogous":["#CAC721","#24CA21"],"triadic":["#2178CA","#CA2178"],"tetradic":["#21CAC7","#7221CA","#CA2124"],"splitComplementary":["#2124CA","#C721CA"],"monochromatic":["#A5E561","#78CA21","#497B14"]}

Variants

{"light":"#A5E561","dark":"#497B14","saturated":"#79E407","desaturated":"#77B03B","pastel":"#B6DF8B","neon":"#8EFF14"}

Nearest named colors

[{"slug":"toxic-green","name":"Toxic Green","hex":"#61DE2A","distance":31.78049716414141},{"slug":"yellow-green","name":"Yellow Green","hex":"#9ACD32","distance":38.13135192987524},{"slug":"kelly-green","name":"Kelly Green","hex":"#4CBB17","distance":47.54997371187496},{"slug":"acid-green","name":"Acid Green","hex":"#B0BF1A","distance":57.4978260458602},{"slug":"lawn-green","name":"Lawn Green","hex":"#7CFC00","distance":60.0416522091123}]

HEX meaning and use

About #78CA21

#78CA21 is classified as a cool green value with vibrant visual character. #78CA21 is visually closest to Toxic Green, a named green color with HEX #61DE2A.

The RGB channels are 120, 202, and 33, with green carrying the strongest channel weight. In HSL, the hue is 89deg with 72% 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 0.4634, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 31.78, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text10.27:1AA Pass

White text2.05:1AA Fail

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

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #78CA21 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000010.27:1 · AAA

White text#FFFFFF2.05:1 · Fail

Accessible Alternatives

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

#A5E561#000000 text · best 13.98:1#A5E561

#79E407#000000 text · best 12.91:1#79E407

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

#CAC721#000000 text · best 11.7:1#CAC721

Generated Palette

#78CA21#78CA21

#7221CA#7221CA

#CAC721#CAC721

#24CA21#24CA21

#A5E561#A5E561

#497B14#497B14

Color Harmonies

#7221CA#7221CA

#CAC721#CAC721

#24CA21#24CA21

#2178CA#2178CA

#CA2178#CA2178

Variants

#A5E561#A5E561

#497B14#497B14

#79E407#79E407

#77B03B#77B03B

#B6DF8B#B6DF8B

#8EFF14#8EFF14

Nearest Named Colors

Toxic Green#61DE2A

Yellow Green#9ACD32

Kelly Green#4CBB17

Acid Green#B0BF1A

Lawn Green#7CFC00

#78CA21

CSS

Machine-Readable HEX Data (JSON)

About #78CA21

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides