Skip to content
cyan · cool

#81cfba

a light, soft cyan · cool · closest name: Medium Aqua Marine

Token name suggestion: Drift Teal

RGB
129, 207, 186
HSL
164°, 45%, 66%
CMYK
38, 0, 10, 19
Luminance
0.5284

#81cfba is a light soft cyan, 164° on the wheel and 81/100 on the cool side. Put black text on it (11.57:1). As text it scores 1.82:1 on white — use #31816B instead. Nearest name is Medium Aqua Marine, nearest Tailwind family is teal.

hsl(164 45% 66%)rgb(129 207 186)Base step 400AAA inkCool

At a glance

Every number on this page in one read: what #81cfba is made of, how bright it looks, and which way it leans.

Hex
#81cfba
Hue
164°
cyan
Saturation
45%
soft
Lightness
66%
light
Brightness
81%
HSV value
Perceived
72%
weighted brightness
Luminance
0.5284
WCAG relative
Temperature
Cool
81/100 cool
Color family
Cyan
Tone
Soft
Best ink
Black
11.57:1
Closest name
Medium Aqua Marine
ΔE2000 5
Chroma
29.0
LCH, 0–130ish
OKLCH L
0.798
perceptual lightness
Tailwind
teal
500 · ΔE 9.8
Web-safe
#99CCCC
nearest of 216
Where it sits
Hue164° of 360°
Saturation45%
Lightness66%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #81cfba.

Temperature
Warm ← → Cool81% 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
Red9%
Green84%
Blue7%

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

Every format

HEX#81cfba
HEX (8-digit)#81cfbaff
RGBrgb(129, 207, 186)
RGBArgba(129, 207, 186, 1)
HSLhsl(164, 45%, 66%)
HSV / HSBhsv(164, 38%, 81%)
HWBhwb(164 51% 19%)
CMYKcmyk(38%, 0%, 10%, 19%)
LABlab(77.8 -28.8 2.9)
LCHlch(77.8 29.0 174.3)
OKLCHoklch(0.798 0.083 175.1)
XYZ (D65)xyz(40.23, 52.84, 54.52)
Decimal8507322
Display P3color(display-p3 0.506 0.812 0.729)
Web-safe#99CCCC

Copy-ready code

every platformclick to select
/* CSS */
color: #81cfba;
background-color: #81cfba;
/* CSS custom property */
--brand: #81cfba;
/* Tailwind (arbitrary) */
class="text-[#81cfba] bg-[#81cfba]"
/* SCSS */
$brand: #81cfba;
/* SwiftUI */
Color(red: 0.506, green: 0.812, blue: 0.729)
/* UIKit */
UIColor(red: 0.506, green: 0.812, blue: 0.729, alpha: 1)
/* Android XML */
<color name="brand">#81CFBA</color>
/* Android Compose */
Color(0xFF81CFBA)
/* Flutter */
Color(0xFF81CFBA)
/* Python / OpenCV (BGR) */
(186, 207, 129)
/* Python / PIL (RGB) */
(129, 207, 186)
/* Java AWT */
new Color(129, 207, 186)
/* .NET */
Color.FromArgb(255, 129, 207, 186)
/* OpenGL / Unity (0–1) */
(0.5059f, 0.8118f, 0.7294f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{129,207,186}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #81cfba 85%, white);
border-color: color-mix(in oklab, #81cfba 40%, transparent);
/* theme-aware in one line */
color: light-dark(#235C4D, #D3EEE7);
/* relative colour syntax */
--hover: hsl(from #81cfba 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: #F5FAF9;
  --brand-100: #EAF5F2;
  --brand-200: #D1EBE4;
  --brand-300: #AEE0D2;
  --brand-400: #81cfba;
  --brand-500: #5DC1A6;
  --brand-600: #44B194;
  --brand-700: #38947B;
  --brand-800: #2D7662;
  --brand-900: #245649;
  --brand-950: #16362E;
  --brand: #81cfba;
  --brand-ink: #000000;
  --brand-surface: #F4FAF9;
  --brand-border: #C4E8DF;
  --brand-hover: #67C5AC;
  --brand-pressed: #4DBB9E;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142420;
    --brand-ink: #D3EEE7;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F5FAF9',
        100: '#EAF5F2',
        200: '#D1EBE4',
        300: '#AEE0D2',
        400: '#81cfba',
        500: '#5DC1A6',
        600: '#44B194',
        700: '#38947B',
        800: '#2D7662',
        900: '#245649',
        950: '#16362E',
        DEFAULT: '#81cfba',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F5FAF9,
  '100': #EAF5F2,
  '200': #D1EBE4,
  '300': #AEE0D2,
  '400': #81cfba,
  '500': #5DC1A6,
  '600': #44B194,
  '700': #38947B,
  '800': #2D7662,
  '900': #245649,
  '950': #16362E,
);
$brand-base: #81cfba;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F5FAF9", "$type": "color" },
      "100": { "$value": "#EAF5F2", "$type": "color" },
      "200": { "$value": "#D1EBE4", "$type": "color" },
      "300": { "$value": "#AEE0D2", "$type": "color" },
      "400": { "$value": "#81cfba", "$type": "color" },
      "500": { "$value": "#5DC1A6", "$type": "color" },
      "600": { "$value": "#44B194", "$type": "color" },
      "700": { "$value": "#38947B", "$type": "color" },
      "800": { "$value": "#2D7662", "$type": "color" },
      "900": { "$value": "#245649", "$type": "color" },
      "950": { "$value": "#16362E", "$type": "color" }
    },
    "brandInk": { "$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 #81cfba · 11.57:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.82:1
AA fail · AA large fail · AAA fail
Aa
Black text · 11.57:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #81cfba as text scores 1.82:1 on white and 11.57:1 on black.
Best tinted ink on it, if plain black or white feels flat: #235C4D at 4.27:1.

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
#31816B · 4.68:1
AA on white−31% L
#31816B
The quick fox
#266353 · 7.02:1
AAA on white−39% L
#266353
The quick fox
#81cfba · 11.57:1
AA on blackalready passes
#81cfba
The quick fox
#81cfba · 11.57:1
AAA on blackalready passes
#81cfba

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #3EA287 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
#81cfba on white: 1.82:1
AA ✗ fail · AA-large · AAA
Aa
#81cfba on black: 11.57:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #81cfba as text on that neutral, and that neutral as text on #81cfba.

NeutralRatioBoth directions
White1.82:1AaAa
Slate 501.74:1AaAa
Slate 1001.66:1AaAa
Slate 2001.47:1AaAa
Slate 3001.22:1AaAa
Slate 4001.41:1AaAa
Slate 5002.62:1AaAa
Slate 6004.17:1AaAa
Slate 7005.70:1AaAa
Slate 8008.06:1AaAa
Slate 9009.83:1AaAa
Black11.57:1AaAa
Colour vision deficiency
true color
protanopia · #CAC6B9
deuteranopia · #BCBCBC
tritanopia · #69D1C9

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. #81cfba 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.

#F5FAF9
#EAF5F2
#D1EBE4
#AEE0D2
#81cfba
#5DC1A6
#44B194
#38947B
#2D7662
#245649
#16362E
Base = 400Lightest = 50 · #F5FAF9Darkest = 950 · #16362EText 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 0.021 175.1);
  --brand-100: oklch(0.94 0.033 175.1);
  --brand-200: oklch(0.88 0.050 175.1);
  --brand-300: oklch(0.80 0.065 175.1);
  --brand-400: oklch(0.72 0.077 175.1);
  --brand-500: oklch(0.64 0.083 175.1);
  --brand-600: oklch(0.56 0.083 175.1);
  --brand-700: oklch(0.48 0.078 175.1);
  --brand-800: oklch(0.40 0.070 175.1);
  --brand-900: oklch(0.32 0.058 175.1);
  --brand-950: oklch(0.24 0.046 175.1);
}

Colors that work with #81cfba

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#F4FAF9
Tinted page background
Border#C4E8DF
Hairlines and dividers
Muted text#4B9B85
Captions on the surface
Accent#973568
Second voice, not a rival
Dark variant#235C4D
Hover, pressed, headers
Light variant#EDF8F5
Selected rows, tints
Dark surface#142420
Dark-mode background
Hover#67C5AC
One step down in lightness
Pressed#4DBB9E
Two steps down
Disabled#D9E7E3
Chroma pulled out
Focus ring#88DCC6
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 #81cfba

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

Works well for
  • Text and icons on dark surfaces
  • Charts, tags and secondary surfaces
  • Card and section backgrounds
  • Brand accents, badges and data highlights
Use with care
  • Text of any size on white — fails WCAG AA
  • 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 #235C4D
Safe as a 1px border on white
No — use #3EA287

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.

The muted chroma softens the association — it reads considered rather than loud, which suits long-form and data-heavy screens. The lightness keeps it airy and approachable.

Worth knowing

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

Reads as
  • FormalityMedium
  • EnergyMedium
  • Weight34/100
  • 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#CF8196
Analogous left#81CF93
Analogous right#81BDCF
Split-complement 1#CF81BD
Split-complement 2#CF9381
Triadic 1#BA81CF
Triadic 2#CFBA81
Tetradic#9381CF
On the wheel
Base+30°−30°+120°+240°+180°164°

#81cfba sits at 164°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red50.6%
Green81.2%
Blue72.9%
R · 0–255
129
0x81
G · 0–255
207
0xcf
B · 0–255
186
0xba

CMYK percentages

Cyan37.7%
Magenta0.0%
Yellow10.1%
Key (black)18.8%

Total ink coverage is 67%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#81cfba text on a black background

contrast 11.57:1

Card sample

#81cfba text on a white background

contrast 1.82:1

Card sample

#81cfba on grey

1.66:1

#81cfba on its own surface

1.72:1

#81cfba on its dark surface

8.88:1

CSS3 live lab

Text font color

The quick brown fox

color: #81cfba;
Background color
Panel with #81cfba background
background-color: #81cfba;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #81cfba;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(129, 207, 186, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(129, 207, 186, 0.45);
Border & gradient
Gradient panel
border: 3px solid #81cfba;
background: linear-gradient(135deg, #81cfba, #81B0CF);
Gradient text

Gradient headline

background: linear-gradient(90deg, #81cfba, #819DCF);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #81cfba;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #81cfba;
caret-color: #81cfba;
Left rule
Pull quote or callout
border-left: 4px solid #81cfba;
Ring + tint
Selected chip
background: #EDF8F5;
box-shadow: inset 0 0 0 2px #81cfba;
Conic badge
68%
background: conic-gradient(#81cfba 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #81cfba 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(129, 207, 186, 0.5)
rgb(129 207 186 / 50%)
#81cfba80
hsl(164 45% 66% / 50%)
color-mix(in srgb, #81cfba 50%, transparent)
Alpha8-digit hexFlat on white
10%#81cfba1a#F2FAF8
20%#81cfba33#E6F5F1
40%#81cfba66#CDECE3
60%#81cfba99#B3E2D6
80%#81cfbacc#9AD9C8

Gradients from #81cfba

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, #ADE0D2, #81cfba 45%, #235C4D);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #81cfba, #6B9BC7);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #81cfba, #CF8196);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #C4E8DE 0%, #81cfba 45%, #235C4D 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4FAF9, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #A6DDAE 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #97C3D7 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #235C4D 0%, transparent 65%), #81cfba;

Monochromatic scale

Palettes built from #81cfba

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.

#81cfba 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

Converts to four-color process without much drama. Proof it anyway.

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 11.57:1.

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.

#81cfba, answered

What color is #81cfba?

#81cfba is a light soft cyan, closest to Medium Aqua Marine (ΔE2000 5). It sits at 164° on the hue wheel with 45% saturation and 66% lightness, which reads as cool.

What is the RGB value of #81cfba?

rgb(129, 207, 186) — 129 red, 207 green and 186 blue out of 255, or 50.6% / 81.2% / 72.9% by channel.

What is #81cfba in HSL and HSV?

hsl(164, 45%, 66%) and hsv(164, 38%, 81%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #81cfba a light or a dark color?

It is a light color. Relative luminance is 0.5284 and perceived brightness is 72%, so black text on it reaches 11.57:1.

Should I use black or white text on #81cfba?

Black. It scores 11.57:1 against #81cfba, versus 1.82:1 for white — AAA at any size.

Is #81cfba accessible on a white background?

#81cfba on white scores 1.82:1, which fails WCAG AA at every size. Darken it to #31816B to reach 4.5:1, or #266353 for 7:1.

What is the complementary color of #81cfba?

#CF8196 sits directly opposite on the wheel. Softer options are the split-complements #CF81BD and #CF9381, which give the same contrast with far less vibration.

What colors go well with #81cfba?

For interface work: #F4FAF9 as the surface, #C4E8DF for borders, #4B9B85 for secondary text, #973568 as an accent and #235C4D for hover and pressed states. For a palette, the analogous pair #81CF93 and #81BDCF stays calm, while #CF8196 is the loudest partner.

What is #81cfba in CMYK for printing?

cmyk(38%, 0%, 10%, 19%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #81cfba warm or cool?

Cool — it scores 81 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #81CF9D; nudged cooler, #7FC9D1.

Which Tailwind color is closest to #81cfba?

The teal family — its 500 step is #14b8a6, ΔE2000 9.8 away. That is a visible difference, so define #81cfba as a custom token rather than reaching for the built-in.

How do I use #81cfba in Tailwind CSS?

Inline it as an arbitrary value with bg-[#81cfba] or text-[#81cfba], 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 #81cfba with 50% opacity?

rgba(129, 207, 186, 0.5), or #81cfba80 in eight-digit hex. Over white that composites to #C0E7DD; over black, #41685D.

Is #81cfba a web-safe color?

No. The nearest web-safe colour is #99CCCC, ΔE2000 9.2 away. The palette only matters for legacy displays and some email clients now.

What does the color #81cfba mean?

As a cyan, it reads clean, technical, fresh. Cyan reads as water, air and infrastructure: cool, hygienic, engineered. At this moderate chroma the association is present but not shouted.

What gradient works with #81cfba?

The safest is same-hue elevation: linear-gradient(135deg, #ADE0D2, #81cfba 45%, #235C4D). For more colour, a short hue run to #6B9BC7 keeps it rich without turning muddy.

Work with #81cfba in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #81cfba at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.