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cyan · cool

#6cbbaf

a balanced, soft cyan · cool · closest name: Light Sea Green

Token name suggestion: Atlas Teal

RGB
108, 187, 175
HSL
171°, 37%, 58%
CMYK
42, 0, 6, 27
Luminance
0.4182

#6cbbaf is a balanced soft cyan, 171° on the wheel and 84/100 on the cool side. Put black text on it (9.36:1). As text it scores 2.24:1 on white — use #3B8076 instead. Nearest name is Light Sea Green, nearest Tailwind family is teal.

hsl(171 37% 58%)rgb(108 187 175)Base step 500AAA inkCool

At a glance

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

Hex
#6cbbaf
Hue
171°
cyan
Saturation
37%
soft
Lightness
58%
balanced
Brightness
73%
HSV value
Perceived
65%
weighted brightness
Luminance
0.4182
WCAG relative
Temperature
Cool
84/100 cool
Color family
Cyan
Tone
Soft
Best ink
Black
9.36:1
Closest name
Light Sea Green
ΔE2000 6.4
Chroma
27.3
LCH, 0–130ish
OKLCH L
0.738
perceptual lightness
Tailwind
teal
500 · ΔE 6.4
Web-safe
#66CC99
nearest of 216
Where it sits
Hue171° of 360°
Saturation37%
Lightness58%
Saturation × lightness field

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

Temperature
Warm ← → Cool84% 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
Red8%
Green85%
Blue7%

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

Every format

HEX#6cbbaf
HEX (8-digit)#6cbbafff
RGBrgb(108, 187, 175)
RGBArgba(108, 187, 175, 1)
HSLhsl(171, 37%, 58%)
HSV / HSBhsv(171, 42%, 73%)
HWBhwb(171 42% 27%)
CMYKcmyk(42%, 0%, 6%, 27%)
LABlab(70.8 -27.2 -1.5)
LCHlch(70.8 27.3 183.2)
OKLCHoklch(0.738 0.080 183.2)
XYZ (D65)xyz(31.69, 41.82, 46.95)
Decimal7125935
Display P3color(display-p3 0.424 0.733 0.686)
Web-safe#66CC99

Copy-ready code

every platformclick to select
/* CSS */
color: #6cbbaf;
background-color: #6cbbaf;
/* CSS custom property */
--brand: #6cbbaf;
/* Tailwind (arbitrary) */
class="text-[#6cbbaf] bg-[#6cbbaf]"
/* SCSS */
$brand: #6cbbaf;
/* SwiftUI */
Color(red: 0.424, green: 0.733, blue: 0.686)
/* UIKit */
UIColor(red: 0.424, green: 0.733, blue: 0.686, alpha: 1)
/* Android XML */
<color name="brand">#6CBBAF</color>
/* Android Compose */
Color(0xFF6CBBAF)
/* Flutter */
Color(0xFF6CBBAF)
/* Python / OpenCV (BGR) */
(175, 187, 108)
/* Python / PIL (RGB) */
(108, 187, 175)
/* Java AWT */
new Color(108, 187, 175)
/* .NET */
Color.FromArgb(255, 108, 187, 175)
/* OpenGL / Unity (0–1) */
(0.4235f, 0.7333f, 0.6863f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{108,187,175}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #6cbbaf 85%, white);
border-color: color-mix(in oklab, #6cbbaf 40%, transparent);
/* theme-aware in one line */
color: light-dark(#285750, #D5ECE8);
/* relative colour syntax */
--hover: hsl(from #6cbbaf 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: #EBF4F3;
  --brand-200: #D3E9E5;
  --brand-300: #B2DBD5;
  --brand-400: #8CCAC0;
  --brand-500: #6cbbaf;
  --brand-600: #4DA79A;
  --brand-700: #418B80;
  --brand-800: #347066;
  --brand-900: #29524C;
  --brand-950: #19332F;
  --brand: #6cbbaf;
  --brand-ink: #000000;
  --brand-surface: #F5FAF9;
  --brand-border: #C7E5E1;
  --brand-hover: #53B0A2;
  --brand-pressed: #47998C;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142422;
    --brand-ink: #D5ECE8;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F5FAF9',
        100: '#EBF4F3',
        200: '#D3E9E5',
        300: '#B2DBD5',
        400: '#8CCAC0',
        500: '#6cbbaf',
        600: '#4DA79A',
        700: '#418B80',
        800: '#347066',
        900: '#29524C',
        950: '#19332F',
        DEFAULT: '#6cbbaf',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F5FAF9,
  '100': #EBF4F3,
  '200': #D3E9E5,
  '300': #B2DBD5,
  '400': #8CCAC0,
  '500': #6cbbaf,
  '600': #4DA79A,
  '700': #418B80,
  '800': #347066,
  '900': #29524C,
  '950': #19332F,
);
$brand-base: #6cbbaf;
$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": "#EBF4F3", "$type": "color" },
      "200": { "$value": "#D3E9E5", "$type": "color" },
      "300": { "$value": "#B2DBD5", "$type": "color" },
      "400": { "$value": "#8CCAC0", "$type": "color" },
      "500": { "$value": "#6cbbaf", "$type": "color" },
      "600": { "$value": "#4DA79A", "$type": "color" },
      "700": { "$value": "#418B80", "$type": "color" },
      "800": { "$value": "#347066", "$type": "color" },
      "900": { "$value": "#29524C", "$type": "color" },
      "950": { "$value": "#19332F", "$type": "color" }
    },
    "brandInk": { "$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 #6cbbaf · 9.36:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.24:1
AA fail · AA large fail · AAA fail
Aa
Black text · 9.36:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #6cbbaf as text scores 2.24:1 on white and 9.36:1 on black.
Best tinted ink on it, if plain black or white feels flat: #285750 at 3.64:1.

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
#3B8076 · 4.63:1
AA on white−21% L
#3B8076
The quick fox
#2D6159 · 7.08:1
AAA on white−30% L
#2D6159
The quick fox
#6cbbaf · 9.36:1
AA on blackalready passes
#6cbbaf
The quick fox
#6cbbaf · 9.36:1
AAA on blackalready passes
#6cbbaf

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #4CA396 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
#6cbbaf on white: 2.24:1
AA ✗ fail · AA-large · AAA
Aa
#6cbbaf on black: 9.36:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

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

NeutralRatioBoth directions
White2.24:1AaAa
Slate 502.14:1AaAa
Slate 1002.05:1AaAa
Slate 2001.82:1AaAa
Slate 3001.51:1AaAa
Slate 4001.14:1AaAa
Slate 5002.12:1AaAa
Slate 6003.38:1AaAa
Slate 7004.62:1AaAa
Slate 8006.52:1AaAa
Slate 9007.96:1AaAa
Black9.36:1AaAa
Colour vision deficiency
true color
protanopia · #B4B3AF
deuteranopia · #A7A9B0
tritanopia · #4DBEB7

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. #6cbbaf is pinned to step 500; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F5FAF9
#EBF4F3
#D3E9E5
#B2DBD5
#8CCAC0
#6cbbaf
#4DA79A
#418B80
#347066
#29524C
#19332F
Base = 500Lightest = 50 · #F5FAF9Darkest = 950 · #19332FText 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 0.020 183.2);
  --brand-100: oklch(0.94 0.032 183.2);
  --brand-200: oklch(0.88 0.048 183.2);
  --brand-300: oklch(0.80 0.063 183.2);
  --brand-400: oklch(0.72 0.074 183.2);
  --brand-500: oklch(0.64 0.080 183.2);
  --brand-600: oklch(0.56 0.080 183.2);
  --brand-700: oklch(0.48 0.076 183.2);
  --brand-800: oklch(0.40 0.068 183.2);
  --brand-900: oklch(0.32 0.056 183.2);
  --brand-950: oklch(0.24 0.044 183.2);
}

Colors that work with #6cbbaf

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#F5FAF9
Tinted page background
Border#C7E5E1
Hairlines and dividers
Muted text#4B9B8F
Captions on the surface
Accent#BF688B
Second voice, not a rival
Dark variant#285750
Hover, pressed, headers
Light variant#EEF7F6
Selected rows, tints
Dark surface#142422
Dark-mode background
Hover#53B0A2
One step down in lightness
Pressed#47998C
Two steps down
Disabled#C0D7D3
Chroma pulled out
Focus ring#70CBBD
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 #6cbbaf

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

Works well for
  • Text and icons on dark surfaces
  • Charts, tags and secondary surfaces
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Text of any size on white — fails WCAG AA
  • 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 #285750
Safe as a 1px border on white
No — use #4CA396

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 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
  • Weight42/100
  • 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#BB6C78
Analogous left#6CBB87
Analogous right#6C9FBB
Split-complement 1#BB6C9F
Split-complement 2#BB876C
Triadic 1#AF6CBB
Triadic 2#BBAF6C
Tetradic#876CBB
On the wheel
Base+30°−30°+120°+240°+180°171°

#6cbbaf sits at 171°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red42.4%
Green73.3%
Blue68.6%
R · 0–255
108
0x6c
G · 0–255
187
0xbb
B · 0–255
175
0xaf

CMYK percentages

Cyan42.2%
Magenta0.0%
Yellow6.4%
Key (black)26.7%

Total ink coverage is 75%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#6cbbaf text on a black background

contrast 9.36:1

Card sample

#6cbbaf text on a white background

contrast 2.24:1

Card sample

#6cbbaf on grey

2.05:1

#6cbbaf on its own surface

2.13:1

#6cbbaf on its dark surface

7.18:1

CSS3 live lab

Text font color

The quick brown fox

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

Glowing headline

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

Soft neon halo

text-shadow: 0 0 14px rgba(108, 187, 175, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(108, 187, 175, 0.45);
Border & gradient
Gradient panel
border: 3px solid #6cbbaf;
background: linear-gradient(135deg, #6cbbaf, #6C92BB);
Gradient text

Gradient headline

background: linear-gradient(90deg, #6cbbaf, #6C7EBB);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #6cbbaf;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #6cbbaf;
caret-color: #6cbbaf;
Left rule
Pull quote or callout
border-left: 4px solid #6cbbaf;
Ring + tint
Selected chip
background: #EEF7F6;
box-shadow: inset 0 0 0 2px #6cbbaf;
Conic badge
68%
background: conic-gradient(#6cbbaf 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #6cbbaf 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(108, 187, 175, 0.5)
rgb(108 187 175 / 50%)
#6cbbaf80
hsl(171 37% 58% / 50%)
color-mix(in srgb, #6cbbaf 50%, transparent)
Alpha8-digit hexFlat on white
10%#6cbbaf1a#F0F8F7
20%#6cbbaf33#E2F1EF
40%#6cbbaf66#C4E4DF
60%#6cbbaf99#A7D6CF
80%#6cbbafcc#89C9BF

Gradients from #6cbbaf

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, #96CEC6, #6cbbaf 45%, #285750);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #6cbbaf, #577BB1);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #6cbbaf, #BB6C78);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #ABD8D1 0%, #6cbbaf 45%, #285750 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F5FAF9, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #8FCB9F 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #81A7C5 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #285750 0%, transparent 65%), #6cbbaf;

Monochromatic scale

Palettes built from #6cbbaf

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.

#6cbbaf 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 9.36:1.

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.

#6cbbaf, answered

What color is #6cbbaf?

#6cbbaf is a balanced soft cyan, closest to Light Sea Green (ΔE2000 6.4). It sits at 171° on the hue wheel with 37% saturation and 58% lightness, which reads as cool.

What is the RGB value of #6cbbaf?

rgb(108, 187, 175) — 108 red, 187 green and 175 blue out of 255, or 42.4% / 73.3% / 68.6% by channel.

What is #6cbbaf in HSL and HSV?

hsl(171, 37%, 58%) and hsv(171, 42%, 73%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #6cbbaf a light or a dark color?

It is a mid-tone. Relative luminance is 0.4182 and perceived brightness is 65%, so black text on it reaches 9.36:1.

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

Black. It scores 9.36:1 against #6cbbaf, versus 2.24:1 for white — AAA at any size.

Is #6cbbaf accessible on a white background?

#6cbbaf on white scores 2.24:1, which fails WCAG AA at every size. Darken it to #3B8076 to reach 4.5:1, or #2D6159 for 7:1.

What is the complementary color of #6cbbaf?

#BB6C78 sits directly opposite on the wheel. Softer options are the split-complements #BB6C9F and #BB876C, which give the same contrast with far less vibration.

What colors go well with #6cbbaf?

For interface work: #F5FAF9 as the surface, #C7E5E1 for borders, #4B9B8F for secondary text, #BF688B as an accent and #285750 for hover and pressed states. For a palette, the analogous pair #6CBB87 and #6C9FBB stays calm, while #BB6C78 is the loudest partner.

What is #6cbbaf in CMYK for printing?

cmyk(42%, 0%, 6%, 27%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #6cbbaf warm or cool?

Cool — it scores 84 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #6CBB92; nudged cooler, #6AABBD.

Which Tailwind color is closest to #6cbbaf?

The teal family — its 500 step is #14b8a6, ΔE2000 6.4 away. That is a visible difference, so define #6cbbaf as a custom token rather than reaching for the built-in.

How do I use #6cbbaf in Tailwind CSS?

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

rgba(108, 187, 175, 0.5), or #6cbbaf80 in eight-digit hex. Over white that composites to #B6DDD7; over black, #365E58.

Is #6cbbaf a web-safe color?

No. The nearest web-safe colour is #66CC99, ΔE2000 11.9 away. The palette only matters for legacy displays and some email clients now.

What does the color #6cbbaf 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 #6cbbaf?

The safest is same-hue elevation: linear-gradient(135deg, #96CEC6, #6cbbaf 45%, #285750). For more colour, a short hue run to #577BB1 keeps it rich without turning muddy.

Work with #6cbbaf in the Color Lab

Every tool opens with this colour already loaded.

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