HEX atlas value

#66C328

#66C328 is a cool green HEX color close to Toxic Green. According to Colors Encyclopedia, it converts to RGB 102, 195, 40, HSL 96, 66%, 46%, has luminance 0.4201, and belongs to the balanced group.

green cool balanced

#66C328 Sample readable text

HEX #66C328

RGB rgb(102, 195, 40)

HSL hsl(96 66% 46%)

CMYK cmyk(48, 0, 79, 24)

Luminance 0.4201

Contrast Black 9.4:1White 2.23:1

CSS

--color-66c328: #66C328;
.background-66c328 { background-color: #66C328; }
.text-66c328 { color: #66C328; }

Luminance0.4201

Black text9.4:1AA Pass

White text2.23:1AA 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":"#66C328","rgb":[102,195,40],"hsl":[96,66,46],"cmyk":[48,0,79,24],"luminance":0.4201,"contrast":{"black":9.4,"white":2.23}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":9.4,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.23,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#97E067","hex":"#97E067","family":"green","bestTextColor":"#000000","contrastBlack":13.17,"contrastWhite":1.59,"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":"#61DD0E","hex":"#61DD0E","family":"green","bestTextColor":"#000000","contrastBlack":11.86,"contrastWhite":1.77,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#B3C328","hex":"#B3C328","family":"yellow","bestTextColor":"#000000","contrastBlack":10.75,"contrastWhite":1.95,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Lime Green","hex":"#32CD32","family":"green","bestTextColor":"#000000","contrastBlack":9.91,"contrastWhite":2.12,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool green","balanced","balanced green","Toxic Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","botanical and wellness palettes"],"contrastSafeWith":["#000000","#1A1A1A"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/66c328.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/toxic-green.json","https://www.colorsencyclopedia.com/api/colors/kelly-green.json","https://www.colorsencyclopedia.com/api/colors/olive-drab.json"]}

Harmonies

{"complementary":"#8528C3","analogous":["#B3C328","#28C337"],"triadic":["#2866C3","#C32866"],"tetradic":["#28B3C3","#8528C3","#C33728"],"splitComplementary":["#3728C3","#C328B3"],"monochromatic":["#97E067","#66C328","#3E7718"]}

Variants

{"light":"#97E067","dark":"#3E7718","saturated":"#61DD0E","desaturated":"#6BA942","pastel":"#AEDB8F","neon":"#72FF14"}

Nearest named colors

[{"slug":"toxic-green","name":"Toxic Green","hex":"#61DE2A","distance":27.53179979587241},{"slug":"kelly-green","name":"Kelly Green","hex":"#4CBB17","distance":32.07802986469088},{"slug":"olive-drab","name":"Olive Drab","hex":"#6B8E23","distance":53.4696175411794},{"slug":"olive-leaf","name":"Olive Leaf","hex":"#6B8E23","distance":53.4696175411794},{"slug":"lime-green","name":"Lime Green","hex":"#32CD32","distance":53.88877434122992}]

HEX meaning and use

About #66C328

#66C328 is classified as a cool green value with balanced visual character. #66C328 is visually closest to Toxic Green, a named green color with HEX #61DE2A.

The RGB channels are 102, 195, and 40, with green carrying the strongest channel weight. In HSL, the hue is 96deg with 66% saturation and 46% lightness, so this page treats it as a moderate-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 botanical and wellness palettes. Its luminance is 0.4201, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 27.53, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text9.4:1AA Pass

White text2.23:1AA Fail

AA text options: #000000, #1A1A1A.

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #66C328 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000009.4:1 · AAA

White text#FFFFFF2.23:1 · Fail

Accessible Alternatives

#97E067#000000 text · best 13.17:1#97E067

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

#61DD0E#000000 text · best 11.86:1#61DD0E

#B3C328#000000 text · best 10.75:1#B3C328

Lime Green#000000 text · best 9.91:1#32CD32

Generated Palette

#66C328#66C328

#8528C3#8528C3

#B3C328#B3C328

#28C337#28C337

#97E067#97E067

#3E7718#3E7718

Color Harmonies

#8528C3#8528C3

#B3C328#B3C328

#28C337#28C337

#2866C3#2866C3

#C32866#C32866

Variants

#97E067#97E067

#3E7718#3E7718

#61DD0E#61DD0E

#6BA942#6BA942

#AEDB8F#AEDB8F

#72FF14#72FF14

Nearest Named Colors

Toxic Green#61DE2A

Kelly Green#4CBB17

Olive Drab#6B8E23

Olive Leaf#6B8E23

Lime Green#32CD32

#66C328

CSS

Machine-Readable HEX Data (JSON)

About #66C328

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides