Skip to content
cyan · cool

#03d2ab

a dark, electric cyan · cool · closest name: Medium Aqua Marine

Token name suggestion: Slate Reef

RGB
3, 210, 171
HSL
169°, 97%, 42%
CMYK
99, 0, 19, 18
Luminance
0.4905

#03d2ab is a dark electric cyan, 169° on the wheel and 83/100 on the cool side. Put black text on it (10.81:1). As text it scores 1.94:1 on white — use #02826A instead. Nearest name is Medium Aqua Marine, nearest Tailwind family is emerald.

hsl(169 97% 42%)rgb(3 210 171)Base step 700AAA inkCool

At a glance

Every number on this page in one read: what #03d2ab is made of, how bright it looks, and which way it leans.

Hex
#03d2ab
Hue
169°
cyan
Saturation
97%
electric
Lightness
42%
dark
Brightness
82%
HSV value
Perceived
67%
weighted brightness
Luminance
0.4905
WCAG relative
Temperature
Cool
83/100 cool
Color family
Cyan
Tone
Electric
Best ink
Black
10.81:1
Closest name
Medium Aqua Marine
ΔE2000 4.8
Chroma
52.8
LCH, 0–130ish
OKLCH L
0.770
perceptual lightness
Tailwind
emerald
500 · ΔE 8.5
Web-safe
#00CC99
nearest of 216
Where it sits
Hue169° of 360°
Saturation97%
Lightness42%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #03d2ab.

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
Red0%
Green94%
Blue6%

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

Every format

HEX#03d2ab
HEX (8-digit)#03d2abff
RGBrgb(3, 210, 171)
RGBArgba(3, 210, 171, 1)
HSLhsl(169, 97%, 42%)
HSV / HSBhsv(169, 99%, 82%)
HWBhwb(169 1% 18%)
CMYKcmyk(99%, 0%, 19%, 18%)
LABlab(75.5 -52.3 7.2)
LCHlch(75.5 52.8 172.1)
OKLCHoklch(0.770 0.148 172.9)
XYZ (D65)xyz(30.43, 49.05, 46.38)
Decimal250539
Display P3color(display-p3 0.012 0.824 0.671)
Web-safe#00CC99

Copy-ready code

every platformclick to select
/* CSS */
color: #03d2ab;
background-color: #03d2ab;
/* CSS custom property */
--brand: #03d2ab;
/* Tailwind (arbitrary) */
class="text-[#03d2ab] bg-[#03d2ab]"
/* SCSS */
$brand: #03d2ab;
/* SwiftUI */
Color(red: 0.012, green: 0.824, blue: 0.671)
/* UIKit */
UIColor(red: 0.012, green: 0.824, blue: 0.671, alpha: 1)
/* Android XML */
<color name="brand">#03D2AB</color>
/* Android Compose */
Color(0xFF03D2AB)
/* Flutter */
Color(0xFF03D2AB)
/* Python / OpenCV (BGR) */
(171, 210, 3)
/* Python / PIL (RGB) */
(3, 210, 171)
/* Java AWT */
new Color(3, 210, 171)
/* .NET */
Color.FromArgb(255, 3, 210, 171)
/* OpenGL / Unity (0–1) */
(0.0118f, 0.8235f, 0.6706f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{3,210,171}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #03d2ab 85%, white);
border-color: color-mix(in oklab, #03d2ab 40%, transparent);
/* theme-aware in one line */
color: light-dark(#027E66, #D3EEE9);
/* relative colour syntax */
--hover: hsl(from #03d2ab 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: #F1FDFB;
  --brand-100: #E4FCF7;
  --brand-200: #C1FBF0;
  --brand-300: #90FDE9;
  --brand-400: #59FDDE;
  --brand-500: #22FCD3;
  --brand-600: #03F1C5;
  --brand-700: #03d2ab;
  --brand-800: #02A183;
  --brand-900: #06745F;
  --brand-950: #04483C;
  --brand: #03d2ab;
  --brand-ink: #000000;
  --brand-surface: #F4FAF9;
  --brand-border: #C0EDE4;
  --brand-hover: #02AF8F;
  --brand-pressed: #028C72;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142421;
    --brand-ink: #D3EEE9;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F1FDFB',
        100: '#E4FCF7',
        200: '#C1FBF0',
        300: '#90FDE9',
        400: '#59FDDE',
        500: '#22FCD3',
        600: '#03F1C5',
        700: '#03d2ab',
        800: '#02A183',
        900: '#06745F',
        950: '#04483C',
        DEFAULT: '#03d2ab',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F1FDFB,
  '100': #E4FCF7,
  '200': #C1FBF0,
  '300': #90FDE9,
  '400': #59FDDE,
  '500': #22FCD3,
  '600': #03F1C5,
  '700': #03d2ab,
  '800': #02A183,
  '900': #06745F,
  '950': #04483C,
);
$brand-base: #03d2ab;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F1FDFB", "$type": "color" },
      "100": { "$value": "#E4FCF7", "$type": "color" },
      "200": { "$value": "#C1FBF0", "$type": "color" },
      "300": { "$value": "#90FDE9", "$type": "color" },
      "400": { "$value": "#59FDDE", "$type": "color" },
      "500": { "$value": "#22FCD3", "$type": "color" },
      "600": { "$value": "#03F1C5", "$type": "color" },
      "700": { "$value": "#03d2ab", "$type": "color" },
      "800": { "$value": "#02A183", "$type": "color" },
      "900": { "$value": "#06745F", "$type": "color" },
      "950": { "$value": "#04483C", "$type": "color" }
    },
    "brandInk": { "$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 #03d2ab · 10.81:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.94:1
AA fail · AA large fail · AAA fail
Aa
Black text · 10.81:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #03d2ab as text scores 1.94:1 on white and 10.81:1 on black.
Best tinted ink on it, if plain black or white feels flat: #027E66 at 2.59:1.

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
#02826A · 4.77:1
AA on white−16% L
#02826A
The quick fox
#016451 · 7.14:1
AAA on white−22% L
#016451
The quick fox
#03d2ab · 10.81:1
AA on blackalready passes
#03d2ab
The quick fox
#03d2ab · 10.81:1
AAA on blackalready passes
#03d2ab

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #02A586 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
#03d2ab on white: 1.94:1
AA ✗ fail · AA-large · AAA
Aa
#03d2ab on black: 10.81:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #03d2ab as text on that neutral, and that neutral as text on #03d2ab.

NeutralRatioBoth directions
White1.94:1AaAa
Slate 501.86:1AaAa
Slate 1001.77:1AaAa
Slate 2001.58:1AaAa
Slate 3001.31:1AaAa
Slate 4001.32:1AaAa
Slate 5002.45:1AaAa
Slate 6003.90:1AaAa
Slate 7005.33:1AaAa
Slate 8007.53:1AaAa
Slate 9009.19:1AaAa
Black10.81:1AaAa
Colour vision deficiency
true color
protanopia · #CBC3A9
deuteranopia · #B5B3AE
tritanopia · #00D4C7

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. #03d2ab is pinned to step 700; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F1FDFB
#E4FCF7
#C1FBF0
#90FDE9
#59FDDE
#22FCD3
#03F1C5
#03d2ab
#02A183
#06745F
#04483C
Base = 700Lightest = 50 · #F1FDFBDarkest = 950 · #04483CText step on white = 900
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 0.037 172.9);
  --brand-100: oklch(0.94 0.059 172.9);
  --brand-200: oklch(0.88 0.089 172.9);
  --brand-300: oklch(0.80 0.115 172.9);
  --brand-400: oklch(0.72 0.136 172.9);
  --brand-500: oklch(0.64 0.148 172.9);
  --brand-600: oklch(0.56 0.148 172.9);
  --brand-700: oklch(0.48 0.139 172.9);
  --brand-800: oklch(0.40 0.124 172.9);
  --brand-900: oklch(0.32 0.103 172.9);
  --brand-950: oklch(0.24 0.081 172.9);
}

Colors that work with #03d2ab

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#C0EDE4
Hairlines and dividers
Muted text#4B9B8C
Captions on the surface
Accent#D5005D
Second voice, not a rival
Dark variant#027E66
Hover, pressed, headers
Light variant#E6FFFA
Selected rows, tints
Dark surface#142421
Dark-mode background
Hover#02AF8F
One step down in lightness
Pressed#028C72
Two steps down
Disabled#8EB7AF
Chroma pulled out
Focus ring#00EABE
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 #03d2ab

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
  • Headers, footers and dark-mode surfaces
  • 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
  • Black 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 #027E66
Safe as a 1px border on white
No — use #02A586

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 low lightness adds weight and formality.

Worth knowing

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

Reads as
  • FormalityHigh
  • EnergyHigh
  • Weight58/100
  • 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#D2032A
Analogous left#03D244
Analogous right#0392D2
Split-complement 1#D20392
Split-complement 2#D24403
Triadic 1#AB03D2
Triadic 2#D2AB03
Tetradic#4403D2
On the wheel
Base+30°−30°+120°+240°+180°169°

#03d2ab sits at 169°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red1.2%
Green82.4%
Blue67.1%
R · 0–255
3
0x03
G · 0–255
210
0xd2
B · 0–255
171
0xab

CMYK percentages

Cyan98.6%
Magenta0.0%
Yellow18.6%
Key (black)17.6%

Total ink coverage is 135%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#03d2ab text on a black background

contrast 10.81:1

Card sample

#03d2ab text on a white background

contrast 1.94:1

Card sample

#03d2ab on grey

1.77:1

#03d2ab on its own surface

1.84:1

#03d2ab on its dark surface

8.29:1

CSS3 live lab

Text font color

The quick brown fox

color: #03d2ab;
Background color
Panel with #03d2ab background
background-color: #03d2ab;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #03d2ab;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(3, 210, 171, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(3, 210, 171, 0.45);
Border & gradient
Gradient panel
border: 3px solid #03d2ab;
background: linear-gradient(135deg, #03d2ab, #036FD2);
Gradient text

Gradient headline

background: linear-gradient(90deg, #03d2ab, #033BD2);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #03d2ab;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #03d2ab;
caret-color: #03d2ab;
Left rule
Pull quote or callout
border-left: 4px solid #03d2ab;
Ring + tint
Selected chip
background: #E6FFFA;
box-shadow: inset 0 0 0 2px #03d2ab;
Conic badge
68%
background: conic-gradient(#03d2ab 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #03d2ab 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(3, 210, 171, 0.5)
rgb(3 210 171 / 50%)
#03d2ab80
hsl(169 97% 42% / 50%)
color-mix(in srgb, #03d2ab 50%, transparent)
Alpha8-digit hexFlat on white
10%#03d2ab1a#E6FBF7
20%#03d2ab33#CDF6EE
40%#03d2ab66#9AEDDD
60%#03d2ab99#68E4CD
80%#03d2abcc#35DBBC

Gradients from #03d2ab

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, #17FCD1, #03d2ab 45%, #027E66);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #03d2ab, #0350B4);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #03d2ab, #D2032A);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #35FCD7 0%, #03d2ab 45%, #027E66 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%, #0DFC43 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #0393F0 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #027E66 0%, transparent 65%), #03d2ab;

Monochromatic scale

Palettes built from #03d2ab

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.

#03d2ab 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

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 10.81:1.

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.

#03d2ab, answered

What color is #03d2ab?

#03d2ab is a dark electric cyan, closest to Medium Aqua Marine (ΔE2000 4.8). It sits at 169° on the hue wheel with 97% saturation and 42% lightness, which reads as cool.

What is the RGB value of #03d2ab?

rgb(3, 210, 171) — 3 red, 210 green and 171 blue out of 255, or 1.2% / 82.4% / 67.1% by channel.

What is #03d2ab in HSL and HSV?

hsl(169, 97%, 42%) and hsv(169, 99%, 82%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #03d2ab a light or a dark color?

It is a mid-tone. Relative luminance is 0.4905 and perceived brightness is 67%, so black text on it reaches 10.81:1.

Should I use black or white text on #03d2ab?

Black. It scores 10.81:1 against #03d2ab, versus 1.94:1 for white — AAA at any size.

Is #03d2ab accessible on a white background?

#03d2ab on white scores 1.94:1, which fails WCAG AA at every size. Darken it to #02826A to reach 4.5:1, or #016451 for 7:1.

What is the complementary color of #03d2ab?

#D2032A sits directly opposite on the wheel. Softer options are the split-complements #D20392 and #D24403, which give the same contrast with far less vibration.

What colors go well with #03d2ab?

For interface work: #F4FAF9 as the surface, #C0EDE4 for borders, #4B9B8C for secondary text, #D5005D as an accent and #027E66 for hover and pressed states. For a palette, the analogous pair #03D244 and #0392D2 stays calm, while #D2032A is the loudest partner.

What is #03d2ab in CMYK for printing?

cmyk(99%, 0%, 19%, 18%). 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 #03d2ab 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 #03D25F; nudged cooler, #01AFD4.

Which Tailwind color is closest to #03d2ab?

The emerald family — its 500 step is #10b981, ΔE2000 8.5 away. That is a visible difference, so define #03d2ab as a custom token rather than reaching for the built-in.

How do I use #03d2ab in Tailwind CSS?

Inline it as an arbitrary value with bg-[#03d2ab] or text-[#03d2ab], 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 #03d2ab with 50% opacity?

rgba(3, 210, 171, 0.5), or #03d2ab80 in eight-digit hex. Over white that composites to #81E9D5; over black, #026956.

Is #03d2ab a web-safe color?

No. The nearest web-safe colour is #00CC99, ΔE2000 3.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #03d2ab 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 #03d2ab?

The safest is same-hue elevation: linear-gradient(135deg, #17FCD1, #03d2ab 45%, #027E66). For more colour, a short hue run to #0350B4 keeps it rich without turning muddy.

Work with #03d2ab in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #03d2ab at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.