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cyan · cool

#6ddffc

a light, electric cyan · cool · closest name: Sky Blue

Token name suggestion: Morning Teal

RGB
109, 223, 252
HSL
192°, 96%, 71%
CMYK
57, 12, 0, 1
Luminance
0.6305

#6ddffc is a light electric cyan, 192° on the wheel and 93/100 on the cool side. Put black text on it (13.61:1). As text it scores 1.54:1 on white — use #037F9F instead. Nearest name is Sky Blue, nearest Tailwind family is cyan.

hsl(192 96% 71%)rgb(109 223 252)Base step 400AAA inkCool

At a glance

Every number on this page in one read: what #6ddffc is made of, how bright it looks, and which way it leans.

Hex
#6ddffc
Hue
192°
cyan
Saturation
96%
electric
Lightness
71%
light
Brightness
99%
HSV value
Perceived
78%
weighted brightness
Luminance
0.6305
WCAG relative
Temperature
Cool
93/100 cool
Color family
Cyan
Tone
Electric
Best ink
Black
13.61:1
Closest name
Sky Blue
ΔE2000 5.8
Chroma
34.2
LCH, 0–130ish
OKLCH L
0.848
perceptual lightness
Tailwind
cyan
500 · ΔE 11.1
Web-safe
#66CCFF
nearest of 216
Where it sits
Hue192° of 360°
Saturation96%
Lightness71%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #6ddffc.

Temperature
Warm ← → Cool93% 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
Red5%
Green84%
Blue11%

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

Every format

HEX#6ddffc
HEX (8-digit)#6ddffcff
RGBrgb(109, 223, 252)
RGBArgba(109, 223, 252, 1)
HSLhsl(192, 96%, 71%)
HSV / HSBhsv(192, 57%, 99%)
HWBhwb(192 43% 1%)
CMYKcmyk(57%, 12%, 0%, 1%)
LABlab(83.5 -24.4 -23.9)
LCHlch(83.5 34.2 224.4)
OKLCHoklch(0.848 0.111 216.8)
XYZ (D65)xyz(50.26, 63.05, 101.60)
Decimal7200764
Display P3color(display-p3 0.427 0.875 0.988)
Web-safe#66CCFF

Copy-ready code

every platformclick to select
/* CSS */
color: #6ddffc;
background-color: #6ddffc;
/* CSS custom property */
--brand: #6ddffc;
/* Tailwind (arbitrary) */
class="text-[#6ddffc] bg-[#6ddffc]"
/* SCSS */
$brand: #6ddffc;
/* SwiftUI */
Color(red: 0.427, green: 0.875, blue: 0.988)
/* UIKit */
UIColor(red: 0.427, green: 0.875, blue: 0.988, alpha: 1)
/* Android XML */
<color name="brand">#6DDFFC</color>
/* Android Compose */
Color(0xFF6DDFFC)
/* Flutter */
Color(0xFF6DDFFC)
/* Python / OpenCV (BGR) */
(252, 223, 109)
/* Python / PIL (RGB) */
(109, 223, 252)
/* Java AWT */
new Color(109, 223, 252)
/* .NET */
Color.FromArgb(255, 109, 223, 252)
/* OpenGL / Unity (0–1) */
(0.4275f, 0.8745f, 0.9882f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{109,223,252}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #6ddffc 85%, white);
border-color: color-mix(in oklab, #6ddffc 40%, transparent);
/* theme-aware in one line */
color: light-dark(#03647D, #D3E9EE);
/* relative colour syntax */
--hover: hsl(from #6ddffc 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: #F1FBFD;
  --brand-100: #E4F7FC;
  --brand-200: #C1EFFA;
  --brand-300: #91E7FD;
  --brand-400: #6ddffc;
  --brand-500: #23CFFB;
  --brand-600: #05C0F0;
  --brand-700: #04A0C8;
  --brand-800: #0380A0;
  --brand-900: #075D73;
  --brand-950: #043A48;
  --brand: #6ddffc;
  --brand-ink: #000000;
  --brand-surface: #F4F9FA;
  --brand-border: #C0E4ED;
  --brand-hover: #4AD7FB;
  --brand-pressed: #27D0FB;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142124;
    --brand-ink: #D3E9EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F1FBFD',
        100: '#E4F7FC',
        200: '#C1EFFA',
        300: '#91E7FD',
        400: '#6ddffc',
        500: '#23CFFB',
        600: '#05C0F0',
        700: '#04A0C8',
        800: '#0380A0',
        900: '#075D73',
        950: '#043A48',
        DEFAULT: '#6ddffc',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F1FBFD,
  '100': #E4F7FC,
  '200': #C1EFFA,
  '300': #91E7FD,
  '400': #6ddffc,
  '500': #23CFFB,
  '600': #05C0F0,
  '700': #04A0C8,
  '800': #0380A0,
  '900': #075D73,
  '950': #043A48,
);
$brand-base: #6ddffc;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F1FBFD", "$type": "color" },
      "100": { "$value": "#E4F7FC", "$type": "color" },
      "200": { "$value": "#C1EFFA", "$type": "color" },
      "300": { "$value": "#91E7FD", "$type": "color" },
      "400": { "$value": "#6ddffc", "$type": "color" },
      "500": { "$value": "#23CFFB", "$type": "color" },
      "600": { "$value": "#05C0F0", "$type": "color" },
      "700": { "$value": "#04A0C8", "$type": "color" },
      "800": { "$value": "#0380A0", "$type": "color" },
      "900": { "$value": "#075D73", "$type": "color" },
      "950": { "$value": "#043A48", "$type": "color" }
    },
    "brandInk": { "$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 #6ddffc · 13.61:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.54:1
AA fail · AA large fail · AAA fail
Aa
Black text · 13.61:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #6ddffc as text scores 1.54:1 on white and 13.61:1 on black.
Best tinted ink on it, if plain black or white feels flat: #03647D at 4.36:1.

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
#037F9F · 4.63:1
AA on white−39% L
#037F9F
The quick fox
#025F77 · 7.23:1
AAA on white−47% L
#025F77
The quick fox
#6ddffc · 13.61:1
AA on blackalready passes
#6ddffc
The quick fox
#6ddffc · 13.61:1
AAA on blackalready passes
#6ddffc

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #049FC7 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
#6ddffc on white: 1.54:1
AA ✗ fail · AA-large · AAA
Aa
#6ddffc on black: 13.61:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #6ddffc as text on that neutral, and that neutral as text on #6ddffc.

NeutralRatioBoth directions
White1.54:1AaAa
Slate 501.47:1AaAa
Slate 1001.41:1AaAa
Slate 2001.25:1AaAa
Slate 3001.04:1AaAa
Slate 4001.66:1AaAa
Slate 5003.08:1AaAa
Slate 6004.91:1AaAa
Slate 7006.71:1AaAa
Slate 8009.48:1AaAa
Slate 90011.57:1AaAa
Black13.61:1AaAa
Colour vision deficiency
true color
protanopia · #CCD9FE
deuteranopia · #B6C9FC
tritanopia · #00E9E8

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. #6ddffc 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.

#F1FBFD
#E4F7FC
#C1EFFA
#91E7FD
#6ddffc
#23CFFB
#05C0F0
#04A0C8
#0380A0
#075D73
#043A48
Base = 400Lightest = 50 · #F1FBFDDarkest = 950 · #043A48Text step on white = 800
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 0.028 216.8);
  --brand-100: oklch(0.94 0.044 216.8);
  --brand-200: oklch(0.88 0.066 216.8);
  --brand-300: oklch(0.80 0.086 216.8);
  --brand-400: oklch(0.72 0.102 216.8);
  --brand-500: oklch(0.64 0.111 216.8);
  --brand-600: oklch(0.56 0.111 216.8);
  --brand-700: oklch(0.48 0.104 216.8);
  --brand-800: oklch(0.40 0.093 216.8);
  --brand-900: oklch(0.32 0.078 216.8);
  --brand-950: oklch(0.24 0.061 216.8);
}

Colors that work with #6ddffc

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#F4F9FA
Tinted page background
Border#C0E4ED
Hairlines and dividers
Muted text#4B8B9B
Captions on the surface
Accent#CC000A
Second voice, not a rival
Dark variant#03647D
Hover, pressed, headers
Light variant#E6FAFE
Selected rows, tints
Dark surface#142124
Dark-mode background
Hover#4AD7FB
One step down in lightness
Pressed#27D0FB
Two steps down
Disabled#E9EFF1
Chroma pulled out
Focus ring#7EE5FF
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 #6ddffc

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
  • Card and section backgrounds
  • Brand accents, badges and data highlights
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • White text placed on it
  • 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 #03647D
Safe as a 1px border on white
No — use #049FC7

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 lightness keeps it airy and approachable.

Worth knowing

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

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight29/100
  • 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#FC8A6D
Analogous left#6DFCD2
Analogous right#6D97FC
Split-complement 1#FC6D97
Split-complement 2#FCD26D
Triadic 1#FC6DDF
Triadic 2#DFFC6D
Tetradic#D26DFC
On the wheel
Base+30°−30°+120°+240°+180°192°

#6ddffc sits at 192°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red42.7%
Green87.5%
Blue98.8%
R · 0–255
109
0x6d
G · 0–255
223
0xdf
B · 0–255
252
0xfc

CMYK percentages

Cyan56.7%
Magenta11.5%
Yellow0.0%
Key (black)1.2%

Total ink coverage is 69%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#6ddffc text on a black background

contrast 13.61:1

Card sample

#6ddffc text on a white background

contrast 1.54:1

Card sample

#6ddffc on grey

1.41:1

#6ddffc on its own surface

1.45:1

#6ddffc on its dark surface

10.69:1

CSS3 live lab

Text font color

The quick brown fox

color: #6ddffc;
Background color
Panel with #6ddffc background
background-color: #6ddffc;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #6ddffc;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(109, 223, 252, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(109, 223, 252, 0.45);
Border & gradient
Gradient panel
border: 3px solid #6ddffc;
background: linear-gradient(135deg, #6ddffc, #6D80FC);
Gradient text

Gradient headline

background: linear-gradient(90deg, #6ddffc, #7E6DFC);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #6ddffc;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #6ddffc;
caret-color: #6ddffc;
Left rule
Pull quote or callout
border-left: 4px solid #6ddffc;
Ring + tint
Selected chip
background: #E6FAFE;
box-shadow: inset 0 0 0 2px #6ddffc;
Conic badge
68%
background: conic-gradient(#6ddffc 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #6ddffc 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(109, 223, 252, 0.5)
rgb(109 223 252 / 50%)
#6ddffc80
hsl(192 96% 71% / 50%)
color-mix(in srgb, #6ddffc 50%, transparent)
Alpha8-digit hexFlat on white
10%#6ddffc1a#F0FCFF
20%#6ddffc33#E2F9FE
40%#6ddffc66#C5F2FE
60%#6ddffc99#A7ECFD
80%#6ddffccc#8AE5FD

Gradients from #6ddffc

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, #A9ECFD, #6ddffc 45%, #03647D);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #6ddffc, #4F57FB);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #6ddffc, #FC8A6D);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #C7F3FE 0%, #6ddffc 45%, #03647D 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F9FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #9FFDD9 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #8BA3FD 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #03647D 0%, transparent 65%), #6ddffc;

Monochromatic scale

Palettes built from #6ddffc

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.

#6ddffc 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
SurfacesBadgesHighlightsEmpty states
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 13.61:1.

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.

#6ddffc, answered

What color is #6ddffc?

#6ddffc is a light electric cyan, closest to Sky Blue (ΔE2000 5.8). It sits at 192° on the hue wheel with 96% saturation and 71% lightness, which reads as cool.

What is the RGB value of #6ddffc?

rgb(109, 223, 252) — 109 red, 223 green and 252 blue out of 255, or 42.7% / 87.5% / 98.8% by channel.

What is #6ddffc in HSL and HSV?

hsl(192, 96%, 71%) and hsv(192, 57%, 99%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #6ddffc a light or a dark color?

It is a light color. Relative luminance is 0.6305 and perceived brightness is 78%, so black text on it reaches 13.61:1.

Should I use black or white text on #6ddffc?

Black. It scores 13.61:1 against #6ddffc, versus 1.54:1 for white — AAA at any size.

Is #6ddffc accessible on a white background?

#6ddffc on white scores 1.54:1, which fails WCAG AA at every size. Darken it to #037F9F to reach 4.5:1, or #025F77 for 7:1.

What is the complementary color of #6ddffc?

#FC8A6D sits directly opposite on the wheel. Softer options are the split-complements #FC6D97 and #FCD26D, which give the same contrast with far less vibration.

What colors go well with #6ddffc?

For interface work: #F4F9FA as the surface, #C0E4ED for borders, #4B8B9B for secondary text, #CC000A as an accent and #03647D for hover and pressed states. For a palette, the analogous pair #6DFCD2 and #6D97FC stays calm, while #FC8A6D is the loudest partner.

What is #6ddffc in CMYK for printing?

cmyk(57%, 12%, 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 #6ddffc warm or cool?

Cool — it scores 93 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #6DFCE5; nudged cooler, #6CC5FE.

Which Tailwind color is closest to #6ddffc?

The cyan family — its 500 step is #06b6d4, ΔE2000 11.1 away. That is a visible difference, so define #6ddffc as a custom token rather than reaching for the built-in.

How do I use #6ddffc in Tailwind CSS?

Inline it as an arbitrary value with bg-[#6ddffc] or text-[#6ddffc], 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 #6ddffc with 50% opacity?

rgba(109, 223, 252, 0.5), or #6ddffc80 in eight-digit hex. Over white that composites to #B6EFFE; over black, #37707E.

Is #6ddffc a web-safe color?

No. The nearest web-safe colour is #66CCFF, ΔE2000 8.2 away. The palette only matters for legacy displays and some email clients now.

What does the color #6ddffc 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 #6ddffc?

The safest is same-hue elevation: linear-gradient(135deg, #A9ECFD, #6ddffc 45%, #03647D). For more colour, a short hue run to #4F57FB keeps it rich without turning muddy.

Work with #6ddffc in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #6ddffc at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.