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cyan · cool

#39bba3

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

Token name suggestion: Atlas Teal

RGB
57, 187, 163
HSL
169°, 53%, 48%
CMYK
70, 0, 13, 27
Luminance
0.3905

#39bba3 is a balanced vivid cyan, 169° on the wheel and 83/100 on the cool side. Put black text on it (8.81:1). As text it scores 2.38:1 on white — use #288473 instead. Nearest name is Light Sea Green, nearest Tailwind family is teal.

hsl(169 53% 48%)rgb(57 187 163)Base step 600AAA inkCool

At a glance

Every number on this page in one read: what #39bba3 is made of, how bright it looks, and which way it leans.

Hex
#39bba3
Hue
169°
cyan
Saturation
53%
vivid
Lightness
48%
balanced
Brightness
73%
HSV value
Perceived
61%
weighted brightness
Luminance
0.3905
WCAG relative
Temperature
Cool
83/100 cool
Color family
Cyan
Tone
Vivid
Best ink
Black
8.81:1
Closest name
Light Sea Green
ΔE2000 6
Chroma
40.7
LCH, 0–130ish
OKLCH L
0.716
perceptual lightness
Tailwind
teal
500 · ΔE 2.6
Web-safe
#33CC99
nearest of 216
Where it sits
Hue169° of 360°
Saturation53%
Lightness48%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #39bba3.

Temperature
Warm ← → Cool83% 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%
Green91%
Blue7%

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

Every format

HEX#39bba3
HEX (8-digit)#39bba3ff
RGBrgb(57, 187, 163)
RGBArgba(57, 187, 163, 1)
HSLhsl(169, 53%, 48%)
HSV / HSBhsv(169, 70%, 73%)
HWBhwb(169 22% 27%)
CMYKcmyk(70%, 0%, 13%, 27%)
LABlab(68.8 -40.6 2.0)
LCHlch(68.8 40.7 177.2)
OKLCHoklch(0.716 0.117 177.7)
XYZ (D65)xyz(26.07, 39.05, 40.81)
Decimal3783587
Display P3color(display-p3 0.224 0.733 0.639)
Web-safe#33CC99

Copy-ready code

every platformclick to select
/* CSS */
color: #39bba3;
background-color: #39bba3;
/* CSS custom property */
--brand: #39bba3;
/* Tailwind (arbitrary) */
class="text-[#39bba3] bg-[#39bba3]"
/* SCSS */
$brand: #39bba3;
/* SwiftUI */
Color(red: 0.224, green: 0.733, blue: 0.639)
/* UIKit */
UIColor(red: 0.224, green: 0.733, blue: 0.639, alpha: 1)
/* Android XML */
<color name="brand">#39BBA3</color>
/* Android Compose */
Color(0xFF39BBA3)
/* Flutter */
Color(0xFF39BBA3)
/* Python / OpenCV (BGR) */
(163, 187, 57)
/* Python / PIL (RGB) */
(57, 187, 163)
/* Java AWT */
new Color(57, 187, 163)
/* .NET */
Color.FromArgb(255, 57, 187, 163)
/* OpenGL / Unity (0–1) */
(0.2235f, 0.7333f, 0.6392f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{57,187,163}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #39bba3 85%, white);
border-color: color-mix(in oklab, #39bba3 40%, transparent);
/* theme-aware in one line */
color: light-dark(#1E6255, #D3EEE9);
/* relative colour syntax */
--hover: hsl(from #39bba3 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: #E9F6F4;
  --brand-200: #CEEDE8;
  --brand-300: #A9E5DA;
  --brand-400: #7ED8C7;
  --brand-500: #53CBB4;
  --brand-600: #39bba3;
  --brand-700: #309C88;
  --brand-800: #267D6D;
  --brand-900: #1F5B50;
  --brand-950: #133932;
  --brand: #39bba3;
  --brand-ink: #000000;
  --brand-surface: #F4FAF9;
  --brand-border: #C0ECE4;
  --brand-hover: #319F8B;
  --brand-pressed: #288473;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142421;
    --brand-ink: #D3EEE9;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4FBF9',
        100: '#E9F6F4',
        200: '#CEEDE8',
        300: '#A9E5DA',
        400: '#7ED8C7',
        500: '#53CBB4',
        600: '#39bba3',
        700: '#309C88',
        800: '#267D6D',
        900: '#1F5B50',
        950: '#133932',
        DEFAULT: '#39bba3',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4FBF9,
  '100': #E9F6F4,
  '200': #CEEDE8,
  '300': #A9E5DA,
  '400': #7ED8C7,
  '500': #53CBB4,
  '600': #39bba3,
  '700': #309C88,
  '800': #267D6D,
  '900': #1F5B50,
  '950': #133932,
);
$brand-base: #39bba3;
$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": "#E9F6F4", "$type": "color" },
      "200": { "$value": "#CEEDE8", "$type": "color" },
      "300": { "$value": "#A9E5DA", "$type": "color" },
      "400": { "$value": "#7ED8C7", "$type": "color" },
      "500": { "$value": "#53CBB4", "$type": "color" },
      "600": { "$value": "#39bba3", "$type": "color" },
      "700": { "$value": "#309C88", "$type": "color" },
      "800": { "$value": "#267D6D", "$type": "color" },
      "900": { "$value": "#1F5B50", "$type": "color" },
      "950": { "$value": "#133932", "$type": "color" }
    },
    "brandInk": { "$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 #39bba3 · 8.81:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.38:1
AA fail · AA large fail · AAA fail
Aa
Black text · 8.81:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #39bba3 as text scores 2.38:1 on white and 8.81:1 on black.
Best tinted ink on it, if plain black or white feels flat: #1E6255 at 3.00:1.

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
#288473 · 4.53:1
AA on white−14% L
#288473
The quick fox
#1E6154 · 7.26:1
AAA on white−23% L
#1E6154
The quick fox
#39bba3 · 8.81:1
AA on blackalready passes
#39bba3
The quick fox
#39bba3 · 8.81:1
AAA on blackalready passes
#39bba3

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #32A38E 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
#39bba3 on white: 2.38:1
AA ✗ fail · AA-large · AAA
Aa
#39bba3 on black: 8.81:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #39bba3 as text on that neutral, and that neutral as text on #39bba3.

NeutralRatioBoth directions
White2.38:1AaAa
Slate 502.28:1AaAa
Slate 1002.18:1AaAa
Slate 2001.93:1AaAa
Slate 3001.61:1AaAa
Slate 4001.08:1AaAa
Slate 5002.00:1AaAa
Slate 6003.18:1AaAa
Slate 7004.34:1AaAa
Slate 8006.14:1AaAa
Slate 9007.49:1AaAa
Black8.81:1AaAa
Colour vision deficiency
true color
protanopia · #B4B0A2
deuteranopia · #A2A2A5
tritanopia · #00BEB4

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. #39bba3 is pinned to step 600; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F4FBF9
#E9F6F4
#CEEDE8
#A9E5DA
#7ED8C7
#53CBB4
#39bba3
#309C88
#267D6D
#1F5B50
#133932
Base = 600Lightest = 50 · #F4FBF9Darkest = 950 · #133932Text 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 0.029 177.7);
  --brand-100: oklch(0.94 0.047 177.7);
  --brand-200: oklch(0.88 0.070 177.7);
  --brand-300: oklch(0.80 0.091 177.7);
  --brand-400: oklch(0.72 0.107 177.7);
  --brand-500: oklch(0.64 0.117 177.7);
  --brand-600: oklch(0.56 0.117 177.7);
  --brand-700: oklch(0.48 0.110 177.7);
  --brand-800: oklch(0.40 0.098 177.7);
  --brand-900: oklch(0.32 0.082 177.7);
  --brand-950: oklch(0.24 0.064 177.7);
}

Colors that work with #39bba3

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#C0ECE4
Hairlines and dividers
Muted text#4B9B8C
Captions on the surface
Accent#C03471
Second voice, not a rival
Dark variant#1E6255
Hover, pressed, headers
Light variant#EBF9F7
Selected rows, tints
Dark surface#142421
Dark-mode background
Hover#319F8B
One step down in lightness
Pressed#288473
Two steps down
Disabled#A1C3BD
Chroma pulled out
Focus ring#36D2B5
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 #39bba3

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 #1E6255
Safe as a 1px border on white
No — use #32A38E

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
  • Weight52/100
  • 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#BB3951
Analogous left#39BB62
Analogous right#3992BB
Split-complement 1#BB3992
Split-complement 2#BB6239
Triadic 1#A339BB
Triadic 2#BBA339
Tetradic#6239BB
On the wheel
Base+30°−30°+120°+240°+180°169°

#39bba3 sits at 169°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red22.4%
Green73.3%
Blue63.9%
R · 0–255
57
0x39
G · 0–255
187
0xbb
B · 0–255
163
0xa3

CMYK percentages

Cyan69.5%
Magenta0.0%
Yellow12.8%
Key (black)26.7%

Total ink coverage is 109%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#39bba3 text on a black background

contrast 8.81:1

Card sample

#39bba3 text on a white background

contrast 2.38:1

Card sample

#39bba3 on grey

2.18:1

#39bba3 on its own surface

2.26:1

#39bba3 on its dark surface

6.76:1

CSS3 live lab

Text font color

The quick brown fox

color: #39bba3;
Background color
Panel with #39bba3 background
background-color: #39bba3;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #39bba3;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(57, 187, 163, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(57, 187, 163, 0.45);
Border & gradient
Gradient panel
border: 3px solid #39bba3;
background: linear-gradient(135deg, #39bba3, #397CBB);
Gradient text

Gradient headline

background: linear-gradient(90deg, #39bba3, #395CBB);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #39bba3;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #39bba3;
caret-color: #39bba3;
Left rule
Pull quote or callout
border-left: 4px solid #39bba3;
Ring + tint
Selected chip
background: #EBF9F7;
box-shadow: inset 0 0 0 2px #39bba3;
Conic badge
68%
background: conic-gradient(#39bba3 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #39bba3 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(57, 187, 163, 0.5)
rgb(57 187 163 / 50%)
#39bba380
hsl(169 53% 48% / 50%)
color-mix(in srgb, #39bba3 50%, transparent)
Alpha8-digit hexFlat on white
10%#39bba31a#EBF8F6
20%#39bba333#D7F1ED
40%#39bba366#B0E4DA
60%#39bba399#88D6C8
80%#39bba3cc#61C9B5

Gradients from #39bba3

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, #62CFBB, #39bba3 45%, #1E6255);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #39bba3, #3263A3);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #39bba3, #BB3951);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #79D6C5 0%, #39bba3 45%, #1E6255 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%, #5ACD75 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #4A96C8 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #1E6255 0%, transparent 65%), #39bba3;

Monochromatic scale

Palettes built from #39bba3

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.

#39bba3 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 8.81:1.

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.

#39bba3, answered

What color is #39bba3?

#39bba3 is a balanced vivid cyan, closest to Light Sea Green (ΔE2000 6). It sits at 169° on the hue wheel with 53% saturation and 48% lightness, which reads as cool.

What is the RGB value of #39bba3?

rgb(57, 187, 163) — 57 red, 187 green and 163 blue out of 255, or 22.4% / 73.3% / 63.9% by channel.

What is #39bba3 in HSL and HSV?

hsl(169, 53%, 48%) and hsv(169, 70%, 73%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #39bba3 a light or a dark color?

It is a mid-tone. Relative luminance is 0.3905 and perceived brightness is 61%, so black text on it reaches 8.81:1.

Should I use black or white text on #39bba3?

Black. It scores 8.81:1 against #39bba3, versus 2.38:1 for white — AAA at any size.

Is #39bba3 accessible on a white background?

#39bba3 on white scores 2.38:1, which fails WCAG AA at every size. Darken it to #288473 to reach 4.5:1, or #1E6154 for 7:1.

What is the complementary color of #39bba3?

#BB3951 sits directly opposite on the wheel. Softer options are the split-complements #BB3992 and #BB6239, which give the same contrast with far less vibration.

What colors go well with #39bba3?

For interface work: #F4FAF9 as the surface, #C0ECE4 for borders, #4B9B8C for secondary text, #C03471 as an accent and #1E6255 for hover and pressed states. For a palette, the analogous pair #39BB62 and #3992BB stays calm, while #BB3951 is the loudest partner.

What is #39bba3 in CMYK for printing?

cmyk(70%, 0%, 13%, 27%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #39bba3 warm or cool?

Cool — it scores 83 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #39BB73; nudged cooler, #36A5BD.

Which Tailwind color is closest to #39bba3?

The teal family — its 500 step is #14b8a6, ΔE2000 2.6 away. That is close enough to swap in without anyone noticing.

How do I use #39bba3 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#39bba3] or text-[#39bba3], 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 #39bba3 with 50% opacity?

rgba(57, 187, 163, 0.5), or #39bba380 in eight-digit hex. Over white that composites to #9CDDD1; over black, #1D5E52.

Is #39bba3 a web-safe color?

No. The nearest web-safe colour is #33CC99, ΔE2000 8 away. The palette only matters for legacy displays and some email clients now.

What does the color #39bba3 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 #39bba3?

The safest is same-hue elevation: linear-gradient(135deg, #62CFBB, #39bba3 45%, #1E6255). For more colour, a short hue run to #3263A3 keeps it rich without turning muddy.

Work with #39bba3 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #39bba3 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.