HEX atlas value

#45CA21

#45CA21 is a cool green HEX color close to Kelly Green. According to Colors Encyclopedia, it converts to RGB 69, 202, 33, HSL 107, 72%, 46%, has luminance 0.4362, and belongs to the vibrant group.

green cool vibrant

#45CA21 Sample readable text

HEX #45CA21

RGB rgb(69, 202, 33)

HSL hsl(107 72% 46%)

CMYK cmyk(66, 0, 84, 21)

Luminance 0.4362

Contrast Black 9.72:1White 2.16:1

CSS

--color-45ca21: #45CA21;
.background-45ca21 { background-color: #45CA21; }
.text-45ca21 { color: #45CA21; }

Luminance0.4362

Black text9.72:1AA Pass

White text2.16:1AA 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":"#45CA21","rgb":[69,202,33],"hsl":[107,72,46],"cmyk":[66,0,84,21],"luminance":0.4362,"contrast":{"black":9.72,"white":2.16}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":9.72,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.16,"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":"#7EE561","hex":"#7EE561","family":"green","bestTextColor":"#000000","contrastBlack":13.27,"contrastWhite":1.58,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#37E407","hex":"#37E407","family":"green","bestTextColor":"#000000","contrastBlack":12.26,"contrastWhite":1.71,"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":"#9ACA21","hex":"#9ACA21","family":"green","bestTextColor":"#000000","contrastBlack":10.84,"contrastWhite":1.94,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","vibrant","vibrant green","Kelly 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/45ca21.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/kelly-green.json","https://www.colorsencyclopedia.com/api/colors/lime-green.json","https://www.colorsencyclopedia.com/api/colors/toxic-green.json"]}

Harmonies

{"complementary":"#A521CA","analogous":["#9ACA21","#21CA51"],"triadic":["#2145CA","#CA2145"],"tetradic":["#219ACA","#A521CA","#CA5121"],"splitComplementary":["#5121CA","#CA219A"],"monochromatic":["#7EE561","#45CA21","#2A7B14"]}

Variants

{"light":"#7EE561","dark":"#2A7B14","saturated":"#37E407","desaturated":"#54B03B","pastel":"#9DDF8B","neon":"#47FF14"}

Nearest named colors

[{"slug":"kelly-green","name":"Kelly Green","hex":"#4CBB17","distance":19.339079605813716},{"slug":"lime-green","name":"Lime Green","hex":"#32CD32","distance":25.67099530598687},{"slug":"toxic-green","name":"Toxic Green","hex":"#61DE2A","distance":35.566838487557476},{"slug":"neon-green","name":"Neon Green","hex":"#39FF14","distance":55.87486017879597},{"slug":"olive-drab","name":"Olive Drab","hex":"#6B8E23","distance":71.04927867332644}]

HEX meaning and use

About #45CA21

#45CA21 is classified as a cool green value with vibrant visual character. #45CA21 is visually closest to Kelly Green, a named green color with HEX #4CBB17.

The RGB channels are 69, 202, and 33, with green carrying the strongest channel weight. In HSL, the hue is 107deg 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 0.4362, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 19.34, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text9.72:1AA Pass

White text2.16:1AA Fail

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

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #45CA21 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000009.72:1 · AAA

White text#FFFFFF2.16:1 · Fail

Accessible Alternatives

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

#7EE561#000000 text · best 13.27:1#7EE561

#37E407#000000 text · best 12.26:1#37E407

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

#9ACA21#000000 text · best 10.84:1#9ACA21

Generated Palette

#45CA21#45CA21

#A521CA#A521CA

#9ACA21#9ACA21

#21CA51#21CA51

#7EE561#7EE561

#2A7B14#2A7B14

Color Harmonies

#A521CA#A521CA

#9ACA21#9ACA21

#21CA51#21CA51

#2145CA#2145CA

#CA2145#CA2145

Variants

#7EE561#7EE561

#2A7B14#2A7B14

#37E407#37E407

#54B03B#54B03B

#9DDF8B#9DDF8B

#47FF14#47FF14

Nearest Named Colors

Kelly Green#4CBB17

Lime Green#32CD32

Toxic Green#61DE2A

Neon Green#39FF14

Olive Drab#6B8E23

#45CA21

CSS

Machine-Readable HEX Data (JSON)

About #45CA21

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides