HEX atlas value

#42D204

#42D204 is a cool green HEX color close to Kelly Green. According to Colors Encyclopedia, it converts to RGB 66, 210, 4, HSL 102, 96%, 42%, has luminance 0.4726, and belongs to the vibrant and jewel tone groups.

green cool vibrant jewel-tone

#42D204 Sample readable text

HEX #42D204

RGB rgb(66, 210, 4)

HSL hsl(102 96% 42%)

CMYK cmyk(69, 0, 98, 18)

Luminance 0.4726

Contrast Black 10.45:1White 2.01:1

CSS

--color-42d204: #42D204;
.background-42d204 { background-color: #42D204; }
.text-42d204 { color: #42D204; }

Luminance0.4726

Black text10.45:1AA Pass

White text2.01:1AA 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":"#42D204","rgb":[66,210,4],"hsl":[102,96,42],"cmyk":[69,0,98,18],"luminance":0.4726,"contrast":{"black":10.45,"white":2.01}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":10.45,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.01,"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":"#72FB37","hex":"#72FB37","family":"green","bestTextColor":"#000000","contrastBlack":15.57,"contrastWhite":1.35,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Neon Green","hex":"#39FF14","family":"green","bestTextColor":"#000000","contrastBlack":15.49,"contrastWhite":1.36,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Toxic Green","hex":"#61DE2A","family":"green","bestTextColor":"#000000","contrastBlack":11.99,"contrastWhite":1.75,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#A9D204","hex":"#A9D204","family":"green","bestTextColor":"#000000","contrastBlack":11.91,"contrastWhite":1.76,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","vibrant","jewel tone","vibrant green","jewel tone green","Kelly Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","rich accent palettes","high-energy accents","botanical and wellness palettes"],"contrastSafeWith":["#000000","#1A1A1A","#36454F"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/42d204.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/kelly-green.json","https://www.colorsencyclopedia.com/api/colors/neon-green.json","https://www.colorsencyclopedia.com/api/colors/lime-green.json"]}

Harmonies

{"complementary":"#9404D2","analogous":["#A9D204","#04D22D"],"triadic":["#0442D2","#D20442"],"tetradic":["#04A9D2","#9404D2","#D22D04"],"splitComplementary":["#2D04D2","#D204A9"],"monochromatic":["#72FB37","#42D204","#267802"]}

Variants

{"light":"#72FB37","dark":"#267802","saturated":"#40D600","desaturated":"#4BBA1C","pastel":"#90EF67","neon":"#4CFF00"}

Nearest named colors

[{"slug":"kelly-green","name":"Kelly Green","hex":"#4CBB17","distance":31.464265445104548},{"slug":"neon-green","name":"Neon Green","hex":"#39FF14","distance":48.60041152089147},{"slug":"lime-green","name":"Lime Green","hex":"#32CD32","distance":48.95916665957459},{"slug":"toxic-green","name":"Toxic Green","hex":"#61DE2A","distance":50.48762224545735},{"slug":"lawn-green","name":"Lawn Green","hex":"#7CFC00","distance":71.72168430816443}]

HEX meaning and use

About #42D204

#42D204 is classified as a cool green value with vibrant and jewel tone visual character. #42D204 is visually closest to Kelly Green, a named green color with HEX #4CBB17.

The RGB channels are 66, 210, and 4, with green carrying the strongest channel weight. In HSL, the hue is 102deg with 96% saturation and 42% 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 rich accent palettes. Its luminance is 0.4726, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 31.46, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text10.45:1AA Pass

White text2.01:1AA Fail

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

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #42D204 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000010.45:1 · AAA

White text#FFFFFF2.01:1 · Fail

Accessible Alternatives

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

#72FB37#000000 text · best 15.57:1#72FB37

Neon Green#000000 text · best 15.49:1#39FF14

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

#A9D204#000000 text · best 11.91:1#A9D204

Generated Palette

#42D204#42D204

#9404D2#9404D2

#A9D204#A9D204

#04D22D#04D22D

#72FB37#72FB37

#267802#267802

Color Harmonies

#9404D2#9404D2

#A9D204#A9D204

#04D22D#04D22D

#0442D2#0442D2

#D20442#D20442

Variants

#72FB37#72FB37

#267802#267802

#40D600#40D600

#4BBA1C#4BBA1C

#90EF67#90EF67

#4CFF00#4CFF00

Nearest Named Colors

Kelly Green#4CBB17

Neon Green#39FF14

Lime Green#32CD32

Toxic Green#61DE2A

Lawn Green#7CFC00

#42D204

CSS

Machine-Readable HEX Data (JSON)

About #42D204

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides