HEX atlas value

#21CA2C

#21CA2C is a cool green HEX color close to Lime Green. According to Colors Encyclopedia, it converts to RGB 33, 202, 44, HSL 124, 72%, 46%, has luminance 0.4275, and belongs to the vibrant group.

green cool vibrant

#21CA2C Sample readable text

HEX #21CA2C

RGB rgb(33, 202, 44)

HSL hsl(124 72% 46%)

CMYK cmyk(84, 0, 78, 21)

Luminance 0.4275

Contrast Black 9.55:1White 2.2:1

CSS

--color-21ca2c: #21CA2C;
.background-21ca2c { background-color: #21CA2C; }
.text-21ca2c { color: #21CA2C; }

Luminance0.4275

Black text9.55:1AA Pass

White text2.2:1AA 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":"#21CA2C","rgb":[33,202,44],"hsl":[124,72,46],"cmyk":[84,0,78,21],"luminance":0.4275,"contrast":{"black":9.55,"white":2.2}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":9.55,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.2,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"Neon Green","hex":"#39FF14","family":"green","bestTextColor":"#000000","contrastBlack":15.49,"contrastWhite":1.36,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#61E56A","hex":"#61E56A","family":"green","bestTextColor":"#000000","contrastBlack":12.92,"contrastWhite":1.62,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#07E416","hex":"#07E416","family":"green","bestTextColor":"#000000","contrastBlack":12.12,"contrastWhite":1.73,"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":"#6ACA21","hex":"#6ACA21","family":"green","bestTextColor":"#000000","contrastBlack":10.08,"contrastWhite":2.08,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","vibrant","vibrant green","Lime 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/21ca2c.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/lime-green.json","https://www.colorsencyclopedia.com/api/colors/kelly-green.json","https://www.colorsencyclopedia.com/api/colors/neon-green.json"]}

Harmonies

{"complementary":"#CA21BE","analogous":["#6ACA21","#21CA81"],"triadic":["#2C21CA","#CA2C21"],"tetradic":["#216ACA","#CA21BE","#CA8121"],"splitComplementary":["#8121CA","#CA216A"],"monochromatic":["#61E56A","#21CA2C","#147B1B"]}

Variants

{"light":"#61E56A","dark":"#147B1B","saturated":"#07E416","desaturated":"#3BB042","pastel":"#8BDF91","neon":"#14FF24"}

Nearest named colors

[{"slug":"lime-green","name":"Lime Green","hex":"#32CD32","distance":18.275666882497067},{"slug":"kelly-green","name":"Kelly Green","hex":"#4CBB17","distance":50.149775672479336},{"slug":"neon-green","name":"Neon Green","hex":"#39FF14","distance":62.93647591023825},{"slug":"forest-green","name":"Forest Green","hex":"#228B22","distance":63.796551630946325},{"slug":"toxic-green","name":"Toxic Green","hex":"#61DE2A","distance":67.08203932499369}]

HEX meaning and use

About #21CA2C

#21CA2C is classified as a cool green value with vibrant visual character. #21CA2C is visually closest to Lime Green, a named green color with HEX #32CD32.

The RGB channels are 33, 202, and 44, with green carrying the strongest channel weight. In HSL, the hue is 124deg 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 0.4275, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 18.28, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text9.55:1AA Pass

White text2.2:1AA Fail

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

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #21CA2C needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000009.55:1 · AAA

White text#FFFFFF2.2:1 · Fail

Accessible Alternatives

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

#61E56A#000000 text · best 12.92:1#61E56A

#07E416#000000 text · best 12.12:1#07E416

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

#6ACA21#000000 text · best 10.08:1#6ACA21

Generated Palette

#21CA2C#21CA2C

#CA21BE#CA21BE

#6ACA21#6ACA21

#21CA81#21CA81

#61E56A#61E56A

#147B1B#147B1B

Color Harmonies

#CA21BE#CA21BE

#6ACA21#6ACA21

#21CA81#21CA81

#2C21CA#2C21CA

#CA2C21#CA2C21

Variants

#61E56A#61E56A

#147B1B#147B1B

#07E416#07E416

#3BB042#3BB042

#8BDF91#8BDF91

#14FF24#14FF24

Nearest Named Colors

Lime Green#32CD32

Kelly Green#4CBB17

Neon Green#39FF14

Forest Green#228B22

Toxic Green#61DE2A

#21CA2C

CSS

Machine-Readable HEX Data (JSON)

About #21CA2C

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides