HEX atlas value

#40E0D0

#40E0D0 is a cool cyan HEX color nearest Turquoise. RGB 64, 224, 208, HSL 174° 72% 56%, luminance 0.5896; view contrast and conversions.

cyan cool vibrant

#40E0D0 Sample readable text

HEX #40E0D0

RGB rgb(64, 224, 208)

HSL hsl(174 72% 56%)

CMYK cmyk(71, 0, 7, 12)

Luminance 0.5896

Contrast Black 12.79:1White 1.64:1

CSS

--color-40e0d0: #40E0D0;
.background-40e0d0 { background-color: #40E0D0; }
.text-40e0d0 { color: #40E0D0; }

HEX meaning and use

About #40E0D0

#40E0D0 is classified as a cool cyan value with vibrant visual character. #40E0D0 is visually closest to Turquoise, a named cyan color with HEX #40E0D0.

The RGB channels are 64, 224, and 208, with green carrying the strongest channel weight. In HSL, the hue is 174deg with 72% saturation and 56% lightness, so this page treats it as a high-saturation, mid-lightness atlas color rather than a generic swatch.

Practical uses for this HEX value include color conversion, WCAG contrast checks, CSS color tokens, and high-energy accents. Its luminance is 0.5896, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 0.00, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text12.79:1AA Pass

White text1.64:1AA Fail

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

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #40E0D0 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000012.79:1 · AAA

White text#FFFFFF1.64:1 · Fail

Accessible Alternatives

#25F8E3#25F8E3 · #000000 text · best 15.61:1 #8DECE3#8DECE3 · #000000 text · best 15.24:1 #3EE07F#3EE07F · #000000 text · best 12.17:1 Medium Turquoise#48D1CC · #000000 text · best 11.27:1 Aquamarine Blue#6BCAE2 · #000000 text · best 11.17:1

Generated Palette

Turquoise#40E0D0

#E03E4E#E03E4E

#3EE07F#3EE07F

#3E9FE0#3E9FE0

#8DECE3#8DECE3

#1BA799#1BA799

Color Harmonies

#E03E4E#E03E4E

#3EE07F#3EE07F

#3E9FE0#3E9FE0

#CF3EE0#CF3EE0

#E0CF3E#E0CF3E

Variants

#8DECE3#8DECE3

#1BA799#1BA799

#25F8E3#25F8E3

#57C7BC#57C7BC

#B3EAE5#B3EAE5

#47FFED#47FFED

Nearest Named Colors

Turquoise#40E0D0

Medium Turquoise#48D1CC

Aquamarine Blue#6BCAE2

Verdigris#43B3AE

Medium Aquamarine#66CDAA

Luminance0.5896

Black text12.79:1AA Pass

White text1.64:1AA 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":"#40E0D0","rgb":[64,224,208],"hsl":[174,72,56],"cmyk":[71,0,7,12],"luminance":0.5896,"contrast":{"black":12.79,"white":1.64}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":12.79,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":1.64,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#25F8E3","hex":"#25F8E3","family":"cyan","bestTextColor":"#000000","contrastBlack":15.61,"contrastWhite":1.34,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#8DECE3","hex":"#8DECE3","family":"cyan","bestTextColor":"#000000","contrastBlack":15.24,"contrastWhite":1.38,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#3EE07F","hex":"#3EE07F","family":"green","bestTextColor":"#000000","contrastBlack":12.17,"contrastWhite":1.72,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Medium Turquoise","hex":"#48D1CC","family":"cyan","bestTextColor":"#000000","contrastBlack":11.27,"contrastWhite":1.86,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Aquamarine Blue","hex":"#6BCAE2","family":"cyan","bestTextColor":"#000000","contrastBlack":11.17,"contrastWhite":1.88,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool cyan","vibrant","vibrant cyan","Turquoise adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents"],"contrastSafeWith":["#000000","#1A1A1A","#36454F"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/40e0d0.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/turquoise.json","https://www.colorsencyclopedia.com/api/colors/medium-turquoise.json","https://www.colorsencyclopedia.com/api/colors/aquamarine-blue.json"]}

Harmonies

{"complementary":"#E03E4E","analogous":["#3EE07F","#3E9FE0"],"triadic":["#CF3EE0","#E0CF3E"],"tetradic":["#7F3EE0","#E03E4E","#9FE03E"],"splitComplementary":["#E03E9F","#E07F3E"],"monochromatic":["#8DECE3","#40E0D0","#1BA799"]}

Variants

{"light":"#8DECE3","dark":"#1BA799","saturated":"#25F8E3","desaturated":"#57C7BC","pastel":"#B3EAE5","neon":"#47FFED"}

Nearest named colors

[{"slug":"turquoise","name":"Turquoise","hex":"#40E0D0","distance":0},{"slug":"medium-turquoise","name":"Medium Turquoise","hex":"#48D1CC","distance":17.46424919657298},{"slug":"aquamarine-blue","name":"Aquamarine Blue","hex":"#6BCAE2","distance":51.54609587543949},{"slug":"verdigris","name":"Verdigris","hex":"#43B3AE","distance":56.480084985771754},{"slug":"medium-aquamarine","name":"Medium Aquamarine","hex":"#66CDAA","distance":57}]

#40E0D0

CSS

About #40E0D0

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Machine-Readable HEX Data (JSON)

Related HEX Guides