HEX
#00FFFFPrimary tokenCSS Named Color Reference
Cyan Color Code
Cyan·#00FFFF
Cyan FamilyCoolMid toneHigh saturationoklch(90.5% 0.155 195)
RGB
rgb(0, 255, 255)Screen valuesHSL
hsl(180 100% 50%)Hue and lightnessCMYK
100, 0, 0, 0Print handoffLAB
91, -48, -14Perceptual referenceOKLCH
oklch(90.5% 0.155 195)Modern perceptualCyan is the canonical CSS named cyan at #00FFFF. It is brighter and more electric than Sky Blue or Deep Sky Blue, making it useful when you need crisp callouts, chart emphasis, futuristic interfaces, or unmistakable cool-toned contrast.
Best text colorDark text
Body text contrast13.68:1
Best UseElectric highlights, technical callouts, and sharp digital accents
Tonal Scale
100#D1FFFF
300#8AFFFF
500#2EFFFF
600#00FFFF
800#00B8B8
Contrast Checks
White text on this color
Buttons, badges, and filled actions.
1.25:1Needs more separation
Dark text on this color
Large headings and selective UI.
13.68:1AAA-level contrast
This color on light surface
Links, borders, and icons on light UI.
1.19:1Needs more separation
Best text colorDark textContrast 13.68:1
Professional Reference
OKLCHoklch(90.5% 0.155 195)
Relative Luminance0.7874
Source TypeCSS Named Color
Classification
Cyan FamilyCoolMid toneHigh saturation
Source Context
Source Type
CSS Named Color
System
CSS
Aliases
Aqua
Closest Matches
Material Cyan A200Material Cyan A100Turquoise
Accessibility Matrix
White text on this color
White text placed on the current color.
1.25:1Needs more separation
Dark text on this color
Dark text or headings on the current color.
13.68:1AAA
This color on light surface
Use this color for links, strokes, or icons on light UI.
1.19:1Needs more separation
This color on dark surface
Use this color inside dark shells for strokes, tags, or icons.
13.68:1AAA
Best text colorDark textContrast 13.68:1 · AAA
Where It Works
- Chart emphasis, technical callouts, and futuristic accents.
- Very bright; best in focused roles, not large reading surfaces.
- Pairs with white, ink-dark neutrals, and deeper blue anchors.
Reference Notes
Last Updated
2026-06-09
Source Library
CSS Standard Colors
Methodology
Verified source values + site guidance
Color Notes
Cyan is sourced from the published CSS Standard Colors library and retained here as a searchable reference swatch for product, interface, and branding work.
Hue Family
Clean cyan and teal hues for product UIs.
Source Collections
CSS Named Colors
Related Colors
Palette Starting Points
Implementation Snippets
:root {
--color-cyan: #00FFFF;
--color-cyan-rgb: 0 255 255;
}class="bg-[#00FFFF] text-white"
class="hover:bg-[#00B8B8] ring-1 ring-[#00FFFF]"{
"cyan": "#00FFFF",
"cyanRgb": [0, 255, 255],
"cyanHsl": [180, 100, 50]
}