CSS named color

Dark Turquoise #00CED1

The CSS keyword darkturquoise is #00CED1. It is a light soft cyan in the cyan family. In OKLCH it sits at lightness 0.772, chroma 0.131 and hue 196.6°.

Relative luminance
0.4875
OKLCH L · C · h
0.772 · 0.131 · 196.6
Best text
Black 10.74:1
Hue family
Cyan
Inspect this color Check contrast

#00CED1 color codes

HEX
#00CED1
RGB
rgb(0, 206, 209)
HSL
hsl(181, 100%, 41%)
OKLCH
oklch(0.772 0.131 196.6)
OKLab
oklab(0.772 -0.126 -0.038)
CIELAB (D65)
L* 75.29, a* -40.04, b* -13.51
XYZ (D65)
X 33.57, Y 48.74, Z 67.95
CMYK (naive)
cmyk(100%, 1%, 0%, 18%)

CIELAB and XYZ use the D65 white point; CSS lab() uses D50, so paste the OKLCH or HEX value into stylesheets. CMYK here is a plain formula with no press profile.

Legibility

Contrast: is #00CED1 accessible?

Black text on it reaches 10.74:1, passing AAA. White text fails at 1.95:1.

WCAG 2 gives the same ratio whichever color is the text; APCA does not, so its Lc changes sign and size with polarity.

Open the Contrast System

  • Black text on it

    10.74:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +67

  • White text on it

    1.95:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc −41

  • As text on black

    10.74:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −65

  • As text on white

    1.95:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc +36

Nearest versions that pass 4.5:1

  • For text on white

    #008486 4.52:1

    Darkening its OKLCH lightness from 0.77 to 0.56 reaches 4.52:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #00CED1 10.74:1

    It already reaches 10.74:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #00CED1 live

Move lightness, chroma and hue in OKLCH, or drag on the map. The map is every lightness and chroma at the current hue: sRGB inside the solid area, Display P3 out to the dashed line.

The studio needs JavaScript.

Scale

Shades and tints of #00CED1

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #00CED1 sits at step 300.

  1. 50#D4FFFF
    White
    1.07
    Black
    19.54
  2. 100#A2FEFF
    White
    1.15
    Black
    18.15
  3. 200#6BEFF1
    White
    1.37
    Black
    15.24
  4. 300This color#00CED1
    White
    1.95
    Black
    10.74
  5. 400#00B8BB
    White
    2.44
    Black
    8.57
  6. 500#00999C
    White
    3.47
    Black
    6.03
  7. 600#007F81
    White
    4.82
    Black
    4.35
  8. 700#006567
    White
    6.86
    Black
    3.05
  9. 800#004A4B
    White
    10.09
    Black
    2.08
  10. 900#003031
    White
    14.31
    Black
    1.46
  11. 950#001B1B
    White
    17.90
    Black
    1.17

Under each step, white and black text on it; a bold figure passes 4.5:1.

Gamut

How vivid #00CED1 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.131; #00CED1 uses 100% of it. Display P3, which many recent phones and laptops show, reaches 0.177 there: 34% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.131
sRGB edge
0.131
Display P3 edge
0.177
Rec. 2020 edge
0.287
Dominant wavelength
491 nm
Excitation purity
33%
Chromaticity
x 0.2234, y 0.3244
  • This color#00CED1
  • Most vivid in sRGB#00CED1
  • Most vivid in Display P3oklch(0.772 0.177 196.6)

On a screen without Display P3 the last tile shows the sRGB edge instead.

Use the wider color where screens show it
.accent {
  color: #00ced1;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0 0.8205 0.8476); }
}

Mixing

Mixing #00CED1

Each row is the same mix worked out in a different space, with the halfway color at its end. sRGB, which older CSS gradients use, can sag gray or dark in the middle; OKLab keeps the lightness steps even; OKLCH holds chroma and hue as it goes.

White #FFFFFF

  • sRGB50%#80E7E8
  • OKLab50%#A6E8E8
  • OKLCH50%#A6E8E8

Black #000000

  • sRGB50%#006769
  • OKLab50%#004E50
  • OKLCH50%#004E50

Its complement #FD9097

  • sRGB50%#7FAFB4
  • OKLab50%#B5B4B5
  • OKLCH50%#AFA8FF
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #00ced1, white);
color: color-mix(in oklch, #00ced1 50%, white);

In use

#00CED1 in an interface

A button, a link, a heading, a focused field, an icon and a chart line in this color, on a light page and a dark one. Each check is a WCAG 2 contrast minimum: 1.4.3 for text, 1.4.11 for the rest.

Light page

  • Button labelText, 4.5:110.74:1 Passes
  • Link and body-size textText, 4.5:11.95:1 Fails
  • Large headingLarge text, 3:11.95:1 Fails
  • Icons, borders and focus ringsNon-text, 3:11.95:1 Fails

For text on this page, the nearest shade that passes is #008486 4.52:1

Dark page

  • Button labelText, 4.5:110.74:1 Passes
  • Link and body-size textText, 4.5:19.58:1 Passes
  • Large headingLarge text, 3:19.58:1 Passes
  • Icons, borders and focus ringsNon-text, 3:19.58:1 Passes

Color vision

How #00CED1 looks with color blindness

Deuteranopia changes it most, ΔE2000 25.4; tritanopia changes it least, 3.8.

Simulated with Machado et al. (2009) at full severity, in linear light.

Simulate a whole page What each type sees

  • Protanopia

    No working red (long-wavelength) cones

    #BFC3D2 ΔE2000 25.4

    Distinct

    Reads as light grayish blue

  • Deuteranopia

    No working green (medium-wavelength) cones

    #A7B2D2 ΔE2000 25.4

    Distinct

    Reads as light grayish blue

  • Tritanopia

    No working blue (short-wavelength) cones

    #00D5CE ΔE2000 3.8

    Close match

    Reads as light soft cyan

  • Achromatopsia

    No cone color vision; lightness only

    #B9B9B9 ΔE2000 24.0

    Distinct

    Reads as light gray

Pairing check

Checked against its complement, #FD9097. Their lightness contrast is only 1.11:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#00CED1 · #FD909755.6Stays distinct
Protanopia#BFC3D2 · #A6A29715.8Stays distinct
Deuteranopia#A7B2D2 · #C1B89528.4Stays distinct
Tritanopia#00D5CE · #FF839361.7Stays distinct
Achromatopsia#B9B9B9 · #AFAFAF2.7Easily confused

Harmony

Color harmonies for #00CED1

Its complement is #FD9097, a light soft red, on the warm side of the wheel.

Hue rotations in OKLCH, mapped into sRGB by trimming chroma so hue and lightness stay put.

Open the Harmony Studio
  • Base#00CED1
  • Complement#FD9097

Complementary

Open in Harmony Studio
  • −30°#4ECFA2
  • Base#00CED1
  • +30°#3EC5F5

Analogous

Open in Harmony Studio
  • Base#00CED1
  • +120°#D69AED
  • +240°#E4A948

Triadic

Open in Harmony Studio
  • Base#00CED1
  • +150°#F191C6
  • +210°#F99969

Split-complementary

Open in Harmony Studio

Code

Design tokens

Ready-to-paste tokens in six formats. Rename them to fit your system.

CSS custom property

:root {
  --color-darkturquoise: #00ced1;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        darkturquoise: '#00ced1',
      },
    },
  },
};

Tailwind v4 theme

/* app.css — Tailwind CSS v4 */
@import "tailwindcss";

@theme {
  --color-darkturquoise: oklch(0.772 0.131 196.6);
}

Design token (W3C DTCG)

{
  "color": {
    "darkturquoise": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0, 0.8078, 0.8196],
        "hex": "#00ced1"
      },
      "$description": "CSS named color darkturquoise"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let darkturquoise = Color(.sRGB, red: 0.000, green: 0.808, blue: 0.820, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Darkturquoise = Color(0xFF00CED1)
}

Matches

The nearest match in each system

The closest CSS name, Tailwind shade, RAL Classic paint and Crayola crayon by ΔE2000; under 2 is hard to tell apart side by side. RAL and Crayola values approximate physical colors.

Neighbors

The eight nearest colors on this site by ΔE2000, closest first. Under 2 is hard to tell apart side by side.

Tools

Open #00CED1 in the tools

Each opens over this page. More colors live in the Color Library, and every color page is listed on the hub.