HEX atlas value

#00FFFF

#00FFFF is a cool cyan HEX color nearest Aqua. RGB 0, 255, 255, HSL 180° 100% 50%, luminance 0.7874; view contrast and conversions.

cyan cool vibrant

#00FFFF Sample readable text

HEX #00FFFF

RGB rgb(0, 255, 255)

HSL hsl(180 100% 50%)

CMYK cmyk(100, 0, 0, 0)

Luminance 0.7874

Contrast Black 16.75:1White 1.25:1

CSS

--color-00ffff: #00FFFF;
.background-00ffff { background-color: #00FFFF; }
.text-00ffff { color: #00FFFF; }

HEX meaning and use

About #00FFFF

#00FFFF is classified as a cool cyan value with vibrant visual character. #00FFFF is visually closest to Aqua, a named cyan color with HEX #00FFFF.

The RGB channels are 0, 255, and 255, with green carrying the strongest channel weight. In HSL, the hue is 180deg with 100% saturation and 50% 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 0.7874, 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 text16.75:1AA Pass

White text1.25:1AA Fail

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

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

Accessibility-Safe Pairings and Alternatives

Use these pairings when #00FFFF needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000016.75:1 · AAA

White text#FFFFFF1.25:1 · Fail

Accessible Alternatives

#5CFFFF#5CFFFF · #000000 text · best 17.2:1 #00FF80#00FF80 · #000000 text · best 15.62:1 #1CE3E3#1CE3E3 · #000000 text · best 13.15:1 Dark Turquoise#00CED1 · #000000 text · best 10.75:1 Robin Egg Blue#00CCCC · #000000 text · best 10.51:1

Generated Palette

Cyan#00FFFF

Red#FF0000

#00FF80#00FF80

#007FFF#007FFF

#5CFFFF#5CFFFF

#00A3A3#00A3A3

Color Harmonies

Red#FF0000

#00FF80#00FF80

#007FFF#007FFF

Magenta#FF00FF

Yellow#FFFF00

Variants

#5CFFFF#5CFFFF

#00A3A3#00A3A3

Cyan#00FFFF

#1CE3E3#1CE3E3

#89F5F5#89F5F5

#29FFFF#29FFFF

Nearest Named Colors

Aqua#00FFFF

Cyan#00FFFF

Deep Sky Blue#00BFFF

Dark Turquoise#00CED1

Robin Egg Blue#00CCCC

Luminance0.7874

Black text16.75:1AA Pass

White text1.25:1AA 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":"#00FFFF","rgb":[0,255,255],"hsl":[180,100,50],"cmyk":[100,0,0,0],"luminance":0.7874,"contrast":{"black":16.75,"white":1.25}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":16.75,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":1.25,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#5CFFFF","hex":"#5CFFFF","family":"cyan","bestTextColor":"#000000","contrastBlack":17.2,"contrastWhite":1.22,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#00FF80","hex":"#00FF80","family":"green","bestTextColor":"#000000","contrastBlack":15.62,"contrastWhite":1.34,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#1CE3E3","hex":"#1CE3E3","family":"cyan","bestTextColor":"#000000","contrastBlack":13.15,"contrastWhite":1.6,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Dark Turquoise","hex":"#00CED1","family":"cyan","bestTextColor":"#000000","contrastBlack":10.75,"contrastWhite":1.95,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Robin Egg Blue","hex":"#00CCCC","family":"cyan","bestTextColor":"#000000","contrastBlack":10.51,"contrastWhite":2,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["cool cyan","vibrant","vibrant cyan","Aqua adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents"],"contrastSafeWith":["#000000","#1A1A1A","#36454F"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/00ffff.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/aqua.json","https://www.colorsencyclopedia.com/api/colors/cyan.json","https://www.colorsencyclopedia.com/api/colors/deep-sky-blue.json"]}

Harmonies

{"complementary":"#FF0000","analogous":["#00FF80","#007FFF"],"triadic":["#FF00FF","#FFFF00"],"tetradic":["#7F00FF","#FF0000","#80FF00"],"splitComplementary":["#FF0080","#FF8000"],"monochromatic":["#5CFFFF","#00FFFF","#00A3A3"]}

Variants

{"light":"#5CFFFF","dark":"#00A3A3","saturated":"#00FFFF","desaturated":"#1CE3E3","pastel":"#89F5F5","neon":"#29FFFF"}

Nearest named colors

[{"slug":"aqua","name":"Aqua","hex":"#00FFFF","distance":0},{"slug":"cyan","name":"Cyan","hex":"#00FFFF","distance":0},{"slug":"deep-sky-blue","name":"Deep Sky Blue","hex":"#00BFFF","distance":64},{"slug":"dark-turquoise","name":"Dark Turquoise","hex":"#00CED1","distance":67.20863039818622},{"slug":"robin-egg-blue","name":"Robin Egg Blue","hex":"#00CCCC","distance":72.12489168102785}]

#00FFFF

CSS

About #00FFFF

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