HEX atlas value

#4DEF78

#4DEF78 is a cool green HEX color close to Emerald. According to Colors Encyclopedia, it converts to RGB 77, 239, 120, HSL 136, 84%, 62%, has luminance 0.6467, and belongs to the vibrant group.

green cool vibrant

#4DEF78 Sample readable text

HEX #4DEF78

RGB rgb(77, 239, 120)

HSL hsl(136 84% 62%)

CMYK cmyk(68, 0, 50, 6)

Luminance 0.6467

Contrast Black 13.93:1White 1.51:1

CSS

--color-4def78: #4DEF78;
.background-4def78 { background-color: #4DEF78; }
.text-4def78 { color: #4DEF78; }

Luminance0.6467

Black text13.93:1AA Pass

White text1.51:1AA 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":"#4DEF78","rgb":[77,239,120],"hsl":[136,84,62],"cmyk":[68,0,50,6],"luminance":0.6467,"contrast":{"black":13.93,"white":1.51}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":13.93,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":1.51,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#A1F7B8","hex":"#A1F7B8","family":"green","bestTextColor":"#000000","contrastBlack":16.51,"contrastWhite":1.27,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#3DFF71","hex":"#3DFF71","family":"green","bestTextColor":"#000000","contrastBlack":15.74,"contrastWhite":1.33,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Light Green","hex":"#90EE90","family":"green","bestTextColor":"#000000","contrastBlack":14.82,"contrastWhite":1.42,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#4DEFCA","hex":"#4DEFCA","family":"cyan","bestTextColor":"#000000","contrastBlack":14.52,"contrastWhite":1.45,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#73EF4D","hex":"#73EF4D","family":"green","bestTextColor":"#000000","contrastBlack":14.18,"contrastWhite":1.48,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","vibrant","vibrant green","Emerald 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/4def78.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/emerald.json","https://www.colorsencyclopedia.com/api/colors/paris-green.json","https://www.colorsencyclopedia.com/api/colors/medium-sea-green.json"]}

Harmonies

{"complementary":"#EF4DC4","analogous":["#73EF4D","#4DEFCA"],"triadic":["#784DEF","#EF784D"],"tetradic":["#4D73EF","#EF4DC4","#EFCA4D"],"splitComplementary":["#CA4DEF","#EF4D73"],"monochromatic":["#A1F7B8","#4DEF78","#12CE44"]}

Variants

{"light":"#A1F7B8","dark":"#12CE44","saturated":"#3DFF71","desaturated":"#62DA82","pastel":"#C7F5D3","neon":"#66FF8F"}

Nearest named colors

[{"slug":"emerald","name":"Emerald","hex":"#50C878","distance":39.11521443121589},{"slug":"paris-green","name":"Paris Green","hex":"#50C878","distance":39.11521443121589},{"slug":"medium-sea-green","name":"Medium Sea Green","hex":"#3CB371","distance":62.75348595894893},{"slug":"medium-aquamarine","name":"Medium Aquamarine","hex":"#66CDAA","distance":65.42935121182236},{"slug":"light-green","name":"Light Green","hex":"#90EE90","distance":71.17583859709698}]

HEX meaning and use

About #4DEF78

#4DEF78 is classified as a cool green value with vibrant visual character. #4DEF78 is visually closest to Emerald, a named green color with HEX #50C878.

The RGB channels are 77, 239, and 120, with green carrying the strongest channel weight. In HSL, the hue is 136deg with 84% saturation and 62% 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 0.6467, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 39.12, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text13.93:1AA Pass

White text1.51:1AA Fail

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

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #4DEF78 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000013.93:1 · AAA

White text#FFFFFF1.51:1 · Fail

Accessible Alternatives

#A1F7B8#000000 text · best 16.51:1#A1F7B8

#3DFF71#000000 text · best 15.74:1#3DFF71

Light Green#000000 text · best 14.82:1#90EE90

#4DEFCA#000000 text · best 14.52:1#4DEFCA

#73EF4D#000000 text · best 14.18:1#73EF4D

Generated Palette

#4DEF78#4DEF78

#EF4DC4#EF4DC4

#73EF4D#73EF4D

#4DEFCA#4DEFCA

#A1F7B8#A1F7B8

#12CE44#12CE44

Color Harmonies

#EF4DC4#EF4DC4

#73EF4D#73EF4D

#4DEFCA#4DEFCA

#784DEF#784DEF

#EF784D#EF784D

Variants

#A1F7B8#A1F7B8

#12CE44#12CE44

#3DFF71#3DFF71

#62DA82#62DA82

#C7F5D3#C7F5D3

#66FF8F#66FF8F

Nearest Named Colors

Emerald#50C878

Paris Green#50C878

Medium Sea Green#3CB371

Medium Aquamarine#66CDAA

Light Green#90EE90

#4DEF78

CSS

Machine-Readable HEX Data (JSON)

About #4DEF78

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides