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cyan · cool

#6ddbb9

a balanced, vivid cyan · cool · closest name: Medium Aqua Marine

Token name suggestion: Studio Teal

RGB
109, 219, 185
HSL
162°, 60%, 64%
CMYK
50, 0, 16, 14
Luminance
0.5742

#6ddbb9 is a balanced vivid cyan, 162° on the wheel and 80/100 on the cool side. Put black text on it (12.48:1). As text it scores 1.68:1 on white — use #218465 instead. Nearest name is Medium Aqua Marine, nearest Tailwind family is teal.

hsl(162 60% 64%)rgb(109 219 185)Base step 400AAA inkCool

At a glance

Every number on this page in one read: what #6ddbb9 is made of, how bright it looks, and which way it leans.

Hex
#6ddbb9
Hue
162°
cyan
Saturation
60%
vivid
Lightness
64%
balanced
Brightness
86%
HSV value
Perceived
74%
weighted brightness
Luminance
0.5742
WCAG relative
Temperature
Cool
80/100 cool
Color family
Cyan
Tone
Vivid
Best ink
Black
12.48:1
Closest name
Medium Aqua Marine
ΔE2000 3.5
Chroma
40.3
LCH, 0–130ish
OKLCH L
0.817
perceptual lightness
Tailwind
teal
500 · ΔE 11.1
Web-safe
#66CCCC
nearest of 216
Where it sits
Hue162° of 360°
Saturation60%
Lightness64%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #6ddbb9.

Temperature
Warm ← → Cool80% 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
Red6%
Green88%
Blue6%

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

Every format

HEX#6ddbb9
HEX (8-digit)#6ddbb9ff
RGBrgb(109, 219, 185)
RGBArgba(109, 219, 185, 1)
HSLhsl(162, 60%, 64%)
HSV / HSBhsv(161, 50%, 86%)
HWBhwb(162 43% 14%)
CMYKcmyk(50%, 0%, 16%, 14%)
LABlab(80.4 -39.7 7.1)
LCHlch(80.4 40.3 169.9)
OKLCHoklch(0.817 0.114 170.8)
XYZ (D65)xyz(40.39, 57.41, 54.84)
Decimal7199673
Display P3color(display-p3 0.427 0.859 0.725)
Web-safe#66CCCC

Copy-ready code

every platformclick to select
/* CSS */
color: #6ddbb9;
background-color: #6ddbb9;
/* CSS custom property */
--brand: #6ddbb9;
/* Tailwind (arbitrary) */
class="text-[#6ddbb9] bg-[#6ddbb9]"
/* SCSS */
$brand: #6ddbb9;
/* SwiftUI */
Color(red: 0.427, green: 0.859, blue: 0.725)
/* UIKit */
UIColor(red: 0.427, green: 0.859, blue: 0.725, alpha: 1)
/* Android XML */
<color name="brand">#6DDBB9</color>
/* Android Compose */
Color(0xFF6DDBB9)
/* Flutter */
Color(0xFF6DDBB9)
/* Python / OpenCV (BGR) */
(185, 219, 109)
/* Python / PIL (RGB) */
(109, 219, 185)
/* Java AWT */
new Color(109, 219, 185)
/* .NET */
Color.FromArgb(255, 109, 219, 185)
/* OpenGL / Unity (0–1) */
(0.4275f, 0.8588f, 0.7255f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{109,219,185}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #6ddbb9 85%, white);
border-color: color-mix(in oklab, #6ddbb9 40%, transparent);
/* theme-aware in one line */
color: light-dark(#19664F, #D3EEE6);
/* relative colour syntax */
--hover: hsl(from #6ddbb9 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: #F4FBF9;
  --brand-100: #E8F7F2;
  --brand-200: #CCEFE5;
  --brand-300: #A5E9D4;
  --brand-400: #6ddbb9;
  --brand-500: #4BD3A9;
  --brand-600: #30C497;
  --brand-700: #28A47E;
  --brand-800: #208364;
  --brand-900: #1B5F4A;
  --brand-950: #113C2E;
  --brand: #6ddbb9;
  --brand-ink: #000000;
  --brand-surface: #F4FAF9;
  --brand-border: #C0EDDF;
  --brand-hover: #50D4AB;
  --brand-pressed: #34CD9E;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #14241F;
    --brand-ink: #D3EEE6;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4FBF9',
        100: '#E8F7F2',
        200: '#CCEFE5',
        300: '#A5E9D4',
        400: '#6ddbb9',
        500: '#4BD3A9',
        600: '#30C497',
        700: '#28A47E',
        800: '#208364',
        900: '#1B5F4A',
        950: '#113C2E',
        DEFAULT: '#6ddbb9',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4FBF9,
  '100': #E8F7F2,
  '200': #CCEFE5,
  '300': #A5E9D4,
  '400': #6ddbb9,
  '500': #4BD3A9,
  '600': #30C497,
  '700': #28A47E,
  '800': #208364,
  '900': #1B5F4A,
  '950': #113C2E,
);
$brand-base: #6ddbb9;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F4FBF9", "$type": "color" },
      "100": { "$value": "#E8F7F2", "$type": "color" },
      "200": { "$value": "#CCEFE5", "$type": "color" },
      "300": { "$value": "#A5E9D4", "$type": "color" },
      "400": { "$value": "#6ddbb9", "$type": "color" },
      "500": { "$value": "#4BD3A9", "$type": "color" },
      "600": { "$value": "#30C497", "$type": "color" },
      "700": { "$value": "#28A47E", "$type": "color" },
      "800": { "$value": "#208364", "$type": "color" },
      "900": { "$value": "#1B5F4A", "$type": "color" },
      "950": { "$value": "#113C2E", "$type": "color" }
    },
    "brandInk": { "$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 #6ddbb9 · 12.48:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.68:1
AA fail · AA large fail · AAA fail
Aa
Black text · 12.48:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #6ddbb9 as text scores 1.68:1 on white and 12.48:1 on black.
Best tinted ink on it, if plain black or white feels flat: #19664F at 4.09:1.

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
#218465 · 4.61:1
AA on white−32% L
#218465
The quick fox
#19634C · 7.17:1
AAA on white−40% L
#19634C
The quick fox
#6ddbb9 · 12.48:1
AA on blackalready passes
#6ddbb9
The quick fox
#6ddbb9 · 12.48:1
AAA on blackalready passes
#6ddbb9

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #29A57F 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
#6ddbb9 on white: 1.68:1
AA ✗ fail · AA-large · AAA
Aa
#6ddbb9 on black: 12.48:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #6ddbb9 as text on that neutral, and that neutral as text on #6ddbb9.

NeutralRatioBoth directions
White1.68:1AaAa
Slate 501.61:1AaAa
Slate 1001.54:1AaAa
Slate 2001.36:1AaAa
Slate 3001.13:1AaAa
Slate 4001.52:1AaAa
Slate 5002.83:1AaAa
Slate 6004.50:1AaAa
Slate 7006.16:1AaAa
Slate 8008.70:1AaAa
Slate 90010.61:1AaAa
Black12.48:1AaAa
Colour vision deficiency
true color
protanopia · #D6CFB7
deuteranopia · #C5C2BB
tritanopia · #40DCD1

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. #6ddbb9 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.

#F4FBF9
#E8F7F2
#CCEFE5
#A5E9D4
#6ddbb9
#4BD3A9
#30C497
#28A47E
#208364
#1B5F4A
#113C2E
Base = 400Lightest = 50 · #F4FBF9Darkest = 950 · #113C2EText 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 0.028 170.8);
  --brand-100: oklch(0.94 0.045 170.8);
  --brand-200: oklch(0.88 0.068 170.8);
  --brand-300: oklch(0.80 0.089 170.8);
  --brand-400: oklch(0.72 0.104 170.8);
  --brand-500: oklch(0.64 0.114 170.8);
  --brand-600: oklch(0.56 0.114 170.8);
  --brand-700: oklch(0.48 0.107 170.8);
  --brand-800: oklch(0.40 0.095 170.8);
  --brand-900: oklch(0.32 0.079 170.8);
  --brand-950: oklch(0.24 0.062 170.8);
}

Colors that work with #6ddbb9

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#C0EDDF
Hairlines and dividers
Muted text#4B9B82
Captions on the surface
Accent#A8246E
Second voice, not a rival
Dark variant#19664F
Hover, pressed, headers
Light variant#EBFAF5
Selected rows, tints
Dark surface#14241F
Dark-mode background
Hover#50D4AB
One step down in lightness
Pressed#34CD9E
Two steps down
Disabled#D4E4DF
Chroma pulled out
Focus ring#75E7C4
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 #6ddbb9

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 #19664F
Safe as a 1px border on white
No — use #29A57F

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.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. 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
  • FormalityMedium
  • EnergyMedium-high
  • Weight36/100
  • 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#DB6D8F
Analogous left#6DDB82
Analogous right#6DC6DB
Split-complement 1#DB6DC6
Split-complement 2#DB826D
Triadic 1#B96DDB
Triadic 2#DBB96D
Tetradic#826DDB
On the wheel
Base+30°−30°+120°+240°+180°162°

#6ddbb9 sits at 162°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red42.7%
Green85.9%
Blue72.5%
R · 0–255
109
0x6d
G · 0–255
219
0xdb
B · 0–255
185
0xb9

CMYK percentages

Cyan50.2%
Magenta0.0%
Yellow15.5%
Key (black)14.1%

Total ink coverage is 80%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#6ddbb9 text on a black background

contrast 12.48:1

Card sample

#6ddbb9 text on a white background

contrast 1.68:1

Card sample

#6ddbb9 on grey

1.54:1

#6ddbb9 on its own surface

1.59:1

#6ddbb9 on its dark surface

9.59:1

CSS3 live lab

Text font color

The quick brown fox

color: #6ddbb9;
Background color
Panel with #6ddbb9 background
background-color: #6ddbb9;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #6ddbb9;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(109, 219, 185, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(109, 219, 185, 0.45);
Border & gradient
Gradient panel
border: 3px solid #6ddbb9;
background: linear-gradient(135deg, #6ddbb9, #6DB4DB);
Gradient text

Gradient headline

background: linear-gradient(90deg, #6ddbb9, #6D98DB);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #6ddbb9;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #6ddbb9;
caret-color: #6ddbb9;
Left rule
Pull quote or callout
border-left: 4px solid #6ddbb9;
Ring + tint
Selected chip
background: #EBFAF5;
box-shadow: inset 0 0 0 2px #6ddbb9;
Conic badge
68%
background: conic-gradient(#6ddbb9 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #6ddbb9 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, 219, 185, 0.5)
rgb(109 219 185 / 50%)
#6ddbb980
hsl(162 60% 64% / 50%)
color-mix(in srgb, #6ddbb9 50%, transparent)
Alpha8-digit hexFlat on white
10%#6ddbb91a#F0FBF8
20%#6ddbb933#E2F8F1
40%#6ddbb966#C5F1E3
60%#6ddbb999#A7E9D5
80%#6ddbb9cc#8AE2C7

Gradients from #6ddbb9

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, #9EE7D1, #6ddbb9 45%, #19664F);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #6ddbb9, #549CD5);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #6ddbb9, #DB6D8F);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #B7EDDC 0%, #6ddbb9 45%, #19664F 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%, #96E59E 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #86C8E1 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #19664F 0%, transparent 65%), #6ddbb9;

Monochromatic scale

Palettes built from #6ddbb9

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.

#6ddbb9 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

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 12.48:1.

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.

#6ddbb9, answered

What color is #6ddbb9?

#6ddbb9 is a balanced vivid cyan, closest to Medium Aqua Marine (ΔE2000 3.5). It sits at 162° on the hue wheel with 60% saturation and 64% lightness, which reads as cool.

What is the RGB value of #6ddbb9?

rgb(109, 219, 185) — 109 red, 219 green and 185 blue out of 255, or 42.7% / 85.9% / 72.5% by channel.

What is #6ddbb9 in HSL and HSV?

hsl(162, 60%, 64%) and hsv(161, 50%, 86%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #6ddbb9 a light or a dark color?

It is a light color. Relative luminance is 0.5742 and perceived brightness is 74%, so black text on it reaches 12.48:1.

Should I use black or white text on #6ddbb9?

Black. It scores 12.48:1 against #6ddbb9, versus 1.68:1 for white — AAA at any size.

Is #6ddbb9 accessible on a white background?

#6ddbb9 on white scores 1.68:1, which fails WCAG AA at every size. Darken it to #218465 to reach 4.5:1, or #19634C for 7:1.

What is the complementary color of #6ddbb9?

#DB6D8F sits directly opposite on the wheel. Softer options are the split-complements #DB6DC6 and #DB826D, which give the same contrast with far less vibration.

What colors go well with #6ddbb9?

For interface work: #F4FAF9 as the surface, #C0EDDF for borders, #4B9B82 for secondary text, #A8246E as an accent and #19664F for hover and pressed states. For a palette, the analogous pair #6DDB82 and #6DC6DB stays calm, while #DB6D8F is the loudest partner.

What is #6ddbb9 in CMYK for printing?

cmyk(50%, 0%, 16%, 14%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #6ddbb9 warm or cool?

Cool — it scores 80 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #6DDB91; nudged cooler, #6BD6DD.

Which Tailwind color is closest to #6ddbb9?

The teal family — its 500 step is #14b8a6, ΔE2000 11.1 away. That is a visible difference, so define #6ddbb9 as a custom token rather than reaching for the built-in.

How do I use #6ddbb9 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#6ddbb9] or text-[#6ddbb9], 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 #6ddbb9 with 50% opacity?

rgba(109, 219, 185, 0.5), or #6ddbb980 in eight-digit hex. Over white that composites to #B6EDDC; over black, #376E5D.

Is #6ddbb9 a web-safe color?

No. The nearest web-safe colour is #66CCCC, ΔE2000 11.9 away. The palette only matters for legacy displays and some email clients now.

What does the color #6ddbb9 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 #6ddbb9?

The safest is same-hue elevation: linear-gradient(135deg, #9EE7D1, #6ddbb9 45%, #19664F). For more colour, a short hue run to #549CD5 keeps it rich without turning muddy.

Work with #6ddbb9 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #6ddbb9 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.