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cyan · cool

#4eedfc

a balanced, electric cyan · cool · closest name: Cyan

Token name suggestion: True Glacier

RGB
78, 237, 252
HSL
185°, 97%, 65%
CMYK
69, 6, 0, 1
Luminance
0.6922

#4eedfc is a balanced electric cyan, 185° on the wheel and 90/100 on the cool side. Put black text on it (14.84:1). As text it scores 1.41:1 on white — use #027F8B instead. Nearest name is Cyan, nearest Tailwind family is cyan.

hsl(185 97% 65%)rgb(78 237 252)Base step 400AAA inkCool

At a glance

Every number on this page in one read: what #4eedfc is made of, how bright it looks, and which way it leans.

Hex
#4eedfc
Hue
185°
cyan
Saturation
97%
electric
Lightness
65%
balanced
Brightness
99%
HSV value
Perceived
80%
weighted brightness
Luminance
0.6922
WCAG relative
Temperature
Cool
90/100 cool
Color family
Cyan
Tone
Electric
Best ink
Black
14.84:1
Closest name
Cyan
ΔE2000 6.8
Chroma
40.8
LCH, 0–130ish
OKLCH L
0.871
perceptual lightness
Tailwind
cyan
500 · ΔE 14.4
Web-safe
#66FFFF
nearest of 216
Where it sits
Hue185° of 360°
Saturation97%
Lightness65%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #4eedfc.

Temperature
Warm ← → Cool90% cool

Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red2%
Green88%
Blue10%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#4eedfc
HEX (8-digit)#4eedfcff
RGBrgb(78, 237, 252)
RGBArgba(78, 237, 252, 1)
HSLhsl(185, 97%, 65%)
HSV / HSBhsv(185, 69%, 99%)
HWBhwb(185 31% 1%)
CMYKcmyk(69%, 6%, 0%, 1%)
LABlab(86.6 -36.0 -19.3)
LCHlch(86.6 40.8 208.1)
OKLCHoklch(0.871 0.130 204.2)
XYZ (D65)xyz(50.99, 69.21, 102.75)
Decimal5172732
Display P3color(display-p3 0.306 0.929 0.988)
Web-safe#66FFFF

Copy-ready code

every platformclick to select
/* CSS */
color: #4eedfc;
background-color: #4eedfc;
/* CSS custom property */
--brand: #4eedfc;
/* Tailwind (arbitrary) */
class="text-[#4eedfc] bg-[#4eedfc]"
/* SCSS */
$brand: #4eedfc;
/* SwiftUI */
Color(red: 0.306, green: 0.929, blue: 0.988)
/* UIKit */
UIColor(red: 0.306, green: 0.929, blue: 0.988, alpha: 1)
/* Android XML */
<color name="brand">#4EEDFC</color>
/* Android Compose */
Color(0xFF4EEDFC)
/* Flutter */
Color(0xFF4EEDFC)
/* Python / OpenCV (BGR) */
(252, 237, 78)
/* Python / PIL (RGB) */
(78, 237, 252)
/* Java AWT */
new Color(78, 237, 252)
/* .NET */
Color.FromArgb(255, 78, 237, 252)
/* OpenGL / Unity (0–1) */
(0.3059f, 0.9294f, 0.9882f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{78,237,252}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #4eedfc 85%, white);
border-color: color-mix(in oklab, #4eedfc 40%, transparent);
/* theme-aware in one line */
color: light-dark(#02737D, #D3ECEE);
/* relative colour syntax */
--hover: hsl(from #4eedfc h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F1FCFD;
  --brand-100: #E4FAFC;
  --brand-200: #C1F6FB;
  --brand-300: #91F4FD;
  --brand-400: #4eedfc;
  --brand-500: #22E8FB;
  --brand-600: #04DCF1;
  --brand-700: #03B8C9;
  --brand-800: #0393A1;
  --brand-900: #076A74;
  --brand-950: #044248;
  --brand: #4eedfc;
  --brand-ink: #000000;
  --brand-surface: #F4FAFA;
  --brand-border: #C0E9ED;
  --brand-hover: #2BE9FB;
  --brand-pressed: #08E6FB;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142324;
    --brand-ink: #D3ECEE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F1FCFD',
        100: '#E4FAFC',
        200: '#C1F6FB',
        300: '#91F4FD',
        400: '#4eedfc',
        500: '#22E8FB',
        600: '#04DCF1',
        700: '#03B8C9',
        800: '#0393A1',
        900: '#076A74',
        950: '#044248',
        DEFAULT: '#4eedfc',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F1FCFD,
  '100': #E4FAFC,
  '200': #C1F6FB,
  '300': #91F4FD,
  '400': #4eedfc,
  '500': #22E8FB,
  '600': #04DCF1,
  '700': #03B8C9,
  '800': #0393A1,
  '900': #076A74,
  '950': #044248,
);
$brand-base: #4eedfc;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F1FCFD", "$type": "color" },
      "100": { "$value": "#E4FAFC", "$type": "color" },
      "200": { "$value": "#C1F6FB", "$type": "color" },
      "300": { "$value": "#91F4FD", "$type": "color" },
      "400": { "$value": "#4eedfc", "$type": "color" },
      "500": { "$value": "#22E8FB", "$type": "color" },
      "600": { "$value": "#04DCF1", "$type": "color" },
      "700": { "$value": "#03B8C9", "$type": "color" },
      "800": { "$value": "#0393A1", "$type": "color" },
      "900": { "$value": "#076A74", "$type": "color" },
      "950": { "$value": "#044248", "$type": "color" }
    },
    "brandInk": { "$value": "#000000", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#000000 on #4eedfc · 14.84:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.41:1
AA fail · AA large fail · AAA fail
Aa
Black text · 14.84:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #4eedfc as text scores 1.41:1 on white and 14.84:1 on black.
Best tinted ink on it, if plain black or white feels flat: #02737D at 3.96:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#027F8B · 4.76:1
AA on white−37% L
#027F8B
The quick fox
#025F68 · 7.40:1
AAA on white−44% L
#025F68
The quick fox
#4eedfc · 14.84:1
AA on blackalready passes
#4eedfc
The quick fox
#4eedfc · 14.84:1
AAA on blackalready passes
#4eedfc

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #03A4B3 is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#4eedfc on white: 1.41:1
AA ✗ fail · AA-large · AAA
Aa
#4eedfc on black: 14.84:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #4eedfc as text on that neutral, and that neutral as text on #4eedfc.

NeutralRatioBoth directions
White1.41:1AaAa
Slate 501.35:1AaAa
Slate 1001.29:1AaAa
Slate 2001.15:1AaAa
Slate 3001.05:1AaAa
Slate 4001.81:1AaAa
Slate 5003.36:1AaAa
Slate 6005.36:1AaAa
Slate 7007.32:1AaAa
Slate 80010.34:1AaAa
Slate 90012.62:1AaAa
Black14.84:1AaAa
Colour vision deficiency
true color
protanopia · #DAE3FD
deuteranopia · #C1D1FD
tritanopia · #00F7F1

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #4eedfc is pinned to step 400; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F1FCFD
#E4FAFC
#C1F6FB
#91F4FD
#4eedfc
#22E8FB
#04DCF1
#03B8C9
#0393A1
#076A74
#044248
Base = 400Lightest = 50 · #F1FCFDDarkest = 950 · #044248Text step on white = 900
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.033 204.2);
  --brand-100: oklch(0.94 0.052 204.2);
  --brand-200: oklch(0.88 0.078 204.2);
  --brand-300: oklch(0.80 0.102 204.2);
  --brand-400: oklch(0.72 0.120 204.2);
  --brand-500: oklch(0.64 0.130 204.2);
  --brand-600: oklch(0.56 0.130 204.2);
  --brand-700: oklch(0.48 0.122 204.2);
  --brand-800: oklch(0.40 0.109 204.2);
  --brand-900: oklch(0.32 0.091 204.2);
  --brand-950: oklch(0.24 0.072 204.2);
}

Colors that work with #4eedfc

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#000000
Black wins here
Surface#F4FAFA
Tinted page background
Border#C0E9ED
Hairlines and dividers
Muted text#4B949B
Captions on the surface
Accent#FF4B68
Second voice, not a rival
Dark variant#02737D
Hover, pressed, headers
Light variant#E6FCFF
Selected rows, tints
Dark surface#142324
Dark-mode background
Hover#2BE9FB
One step down in lightness
Pressed#08E6FB
Two steps down
Disabled#D6E3E5
Chroma pulled out
Focus ring#5FF1FF
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #4eedfc

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Text and icons on dark surfaces
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • Thin strokes and 1px borders — they disappear on light UI
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Not as text
Safe as a fill behind white type
No — use #02737D
Safe as a 1px border on white
No — use #03A4B3

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

cleantechnicalfreshclinical

Cyan reads as water, air and infrastructure: cool, hygienic, engineered.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. The mid lightness keeps it versatile in both themes.

Worth knowing

At high lightness it disappears into white surfaces and thin strokes vanish entirely.

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight35/100
  • TemperatureCool
  • ApproachabilityReserved

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#FC5D4E
Analogous left#4EFCB4
Analogous right#4E96FC
Split-complement 1#FC4E96
Split-complement 2#FCB44E
Triadic 1#FC4EED
Triadic 2#EDFC4E
Tetradic#B44EFC
On the wheel
Base+30°−30°+120°+240°+180°185°

#4eedfc sits at 185°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red30.6%
Green92.9%
Blue98.8%
R · 0–255
78
0x4e
G · 0–255
237
0xed
B · 0–255
252
0xfc

CMYK percentages

Cyan69.0%
Magenta6.0%
Yellow0.0%
Key (black)1.2%

Total ink coverage is 76%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#4eedfc text on a black background

contrast 14.84:1

Card sample

#4eedfc text on a white background

contrast 1.41:1

Card sample

#4eedfc on grey

1.29:1

#4eedfc on its own surface

1.34:1

#4eedfc on its dark surface

11.46:1

CSS3 live lab

Text font color

The quick brown fox

color: #4eedfc;
Background color
Panel with #4eedfc background
background-color: #4eedfc;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #4eedfc;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(78, 237, 252, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(78, 237, 252, 0.45);
Border & gradient
Gradient panel
border: 3px solid #4eedfc;
background: linear-gradient(135deg, #4eedfc, #4E79FC);
Gradient text

Gradient headline

background: linear-gradient(90deg, #4eedfc, #4F4EFC);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #4eedfc;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #4eedfc;
caret-color: #4eedfc;
Left rule
Pull quote or callout
border-left: 4px solid #4eedfc;
Ring + tint
Selected chip
background: #E6FCFF;
box-shadow: inset 0 0 0 2px #4eedfc;
Conic badge
68%
background: conic-gradient(#4eedfc 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #4eedfc over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(78, 237, 252, 0.5)
rgb(78 237 252 / 50%)
#4eedfc80
hsl(185 97% 65% / 50%)
color-mix(in srgb, #4eedfc 50%, transparent)
Alpha8-digit hexFlat on white
10%#4eedfc1a#EDFDFF
20%#4eedfc33#DCFBFE
40%#4eedfc66#B8F8FE
60%#4eedfc99#95F4FD
80%#4eedfccc#71F1FD

Gradients from #4eedfc

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #8AF3FD, #4eedfc 45%, #02737D);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #4eedfc, #3051FC);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #4eedfc, #FC5D4E);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #A8F6FE 0%, #4eedfc 45%, #02737D 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4FAFA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #80FDBF 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #6C9CFD 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #02737D 0%, transparent 65%), #4eedfc;

Monochromatic scale

Palettes built from #4eedfc

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#4eedfc in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
TechnologyTravelHealthcareMedia
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Usable as-is on a dark surface at 14.84:1.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#4eedfc, answered

What color is #4eedfc?

#4eedfc is a balanced electric cyan, closest to Cyan (ΔE2000 6.8). It sits at 185° on the hue wheel with 97% saturation and 65% lightness, which reads as cool.

What is the RGB value of #4eedfc?

rgb(78, 237, 252) — 78 red, 237 green and 252 blue out of 255, or 30.6% / 92.9% / 98.8% by channel.

What is #4eedfc in HSL and HSV?

hsl(185, 97%, 65%) and hsv(185, 69%, 99%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #4eedfc a light or a dark color?

It is a light color. Relative luminance is 0.6922 and perceived brightness is 80%, so black text on it reaches 14.84:1.

Should I use black or white text on #4eedfc?

Black. It scores 14.84:1 against #4eedfc, versus 1.41:1 for white — AAA at any size.

Is #4eedfc accessible on a white background?

#4eedfc on white scores 1.41:1, which fails WCAG AA at every size. Darken it to #027F8B to reach 4.5:1, or #025F68 for 7:1.

What is the complementary color of #4eedfc?

#FC5D4E sits directly opposite on the wheel. Softer options are the split-complements #FC4E96 and #FCB44E, which give the same contrast with far less vibration.

What colors go well with #4eedfc?

For interface work: #F4FAFA as the surface, #C0E9ED for borders, #4B949B for secondary text, #FF4B68 as an accent and #02737D for hover and pressed states. For a palette, the analogous pair #4EFCB4 and #4E96FC stays calm, while #FC5D4E is the loudest partner.

What is #4eedfc in CMYK for printing?

cmyk(69%, 6%, 0%, 1%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #4eedfc warm or cool?

Cool — it scores 90 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #4EFCCB; nudged cooler, #4CC5FE.

Which Tailwind color is closest to #4eedfc?

The cyan family — its 500 step is #06b6d4, ΔE2000 14.4 away. That is a visible difference, so define #4eedfc as a custom token rather than reaching for the built-in.

How do I use #4eedfc in Tailwind CSS?

Inline it as an arbitrary value with bg-[#4eedfc] or text-[#4eedfc], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #4eedfc with 50% opacity?

rgba(78, 237, 252, 0.5), or #4eedfc80 in eight-digit hex. Over white that composites to #A7F6FE; over black, #27777E.

Is #4eedfc a web-safe color?

No. The nearest web-safe colour is #66FFFF, ΔE2000 6.1 away. The palette only matters for legacy displays and some email clients now.

What does the color #4eedfc mean?

As a cyan, it reads clean, technical, fresh. Cyan reads as water, air and infrastructure: cool, hygienic, engineered. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #4eedfc?

The safest is same-hue elevation: linear-gradient(135deg, #8AF3FD, #4eedfc 45%, #02737D). For more colour, a short hue run to #3051FC keeps it rich without turning muddy.

Work with #4eedfc in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #4eedfc at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.