CSS named color

Cadet Blue #5F9EA0

The CSS keyword cadetblue is #5F9EA0. It is a muted cyan in the cyan family. In OKLCH it sits at lightness 0.658, chroma 0.065 and hue 198.3°.

Relative luminance: 0.2942
OKLCH L · C · h: 0.658 · 0.065 · 198.3
Best text: Black 6.88:1
Hue family: Cyan

Inspect this color Check contrast

#5F9EA0 color codes

HEX: #5F9EA0
RGB: rgb(95, 158, 160)
HSL: hsl(182, 25%, 50%)
OKLCH: oklch(0.658 0.065 198.3)
OKLab: oklab(0.658 -0.062 -0.020)
CIELAB (D65): L* 61.15, a* -19.68, b* -7.42
XYZ (D65): X 23.29, Y 29.42, Z 37.70
CMYK (naive): cmyk(41%, 1%, 0%, 37%)

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 #5F9EA0 accessible?

Black text on it reaches 6.88:1, passing AA. White text manages only 3.05:1, enough for large text only.

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

6.88:1
- AA passes
- AA large passes
- AAA fails
- APCA Lc +46
White text on it

3.05:1
- AA fails
- AA large passes
- AAA fails
- APCA Lc −62
As text on black

6.88:1
- AA passes
- AA large passes
- AAA fails
- APCA Lc −44
As text on white

3.05:1
- AA fails
- AA large passes
- AAA fails
- APCA Lc +57

Nearest versions that pass 4.5:1

For text on white

#408082 4.53:1

Darkening its OKLCH lightness from 0.66 to 0.56 reaches 4.53:1 on white, keeping the hue.

Compare both in the Contrast System
For text on black

#5F9EA0 6.88:1

It already reaches 6.88:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #5F9EA0 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 #5F9EA0

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #5F9EA0 sits at step 500.

50#D7FEFF

White
1.07
Black
19.51
100#C2F7F8

White
1.16
Black
17.95
200#ACE4E5

White
1.40
Black
14.98
300#8FCACC

White
1.82
Black
11.48
400#70AEB0

White
2.50
Black
8.37
500This color#5F9EA0

White
3.05
Black
6.88
600#3B7A7C

White
4.92
Black
4.26
700#246365

White
6.89
Black
3.04
800#08494B

White
10.16
Black
2.06
900#003031

White
14.31
Black
1.46
950#001B1C

White
17.89
Black
1.17

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

Gamut

How vivid #5F9EA0 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.112; #5F9EA0 uses 58% of it. Display P3, which many recent phones and laptops show, reaches 0.150 there: 34% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.065
sRGB edge: 0.112
Display P3 edge: 0.150
Rec. 2020 edge: 0.245
Dominant wavelength: 491 nm
Excitation purity: 20%
Chromaticity: x 0.2576, y 0.3254

This color#5F9EA0
Most vivid in sRGB#00A6AA
Most vivid in Display P3oklch(0.658 0.150 198.3)

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

Use the wider color where screens show it

.accent {
  color: #5f9ea0;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0 0.6601 0.6927); }
}

Mixing

Mixing #5F9EA0

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%#AFCFD0
OKLab50%#AFCECF
OKLCH50%#AFCECF

Black #000000

sRGB50%#304F50
OKLab50%#203A3B
OKLCH50%#203A3B

Its complement #B68282

sRGB50%#8B9091
OKLab50%#919191
OKLCH50%#959566

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #5f9ea0, white);
color: color-mix(in oklch, #5f9ea0 50%, white);

In use

#5F9EA0 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, 4.5:16.88:1 Passes
Link and body-size textText, 4.5:13.05:1 Fails
Large headingLarge text, 3:13.05:1 Passes
Icons, borders and focus ringsNon-text, 3:13.05:1 Passes

For text on this page, the nearest shade that passes is #408082 4.53:1

Dark page

Button labelText, 4.5:16.88:1 Passes
Link and body-size textText, 4.5:16.14:1 Passes
Large headingLarge text, 3:16.14:1 Passes
Icons, borders and focus ringsNon-text, 3:16.14:1 Passes

Color vision

How #5F9EA0 looks with color blindness

Deuteranopia changes it most, ΔE2000 19.5; tritanopia changes it least, 5.0.

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

#9699A0 ΔE2000 18.1

Distinct

Reads as gray
Deuteranopia

No working green (medium-wavelength) cones

#8B90A0 ΔE2000 19.5

Distinct

Reads as grayish blue
Tritanopia

No working blue (short-wavelength) cones

#42A29E ΔE2000 5.0

Noticeable

Reads as muted cyan
Achromatopsia

No cone color vision; lightness only

#949494 ΔE2000 17.9

Distinct

Reads as gray

Pairing check

Checked against its complement, #B68282. Their lightness contrast is only 1.05:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#5F9EA0 · #B68282	39.3	Stays distinct
Protanopia	#9699A0 · #8C8982	9.3	Harder to tell apart
Deuteranopia	#8B90A0 · #989381	17.0	Stays distinct
Tritanopia	#42A29E · #C17D82	45.4	Stays distinct
Achromatopsia	#949494 · #8F8F8F	1.7	Easily confused

Harmony

Color harmonies for #5F9EA0

Its complement is #B68282, a muted 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#5F9EA0
Complement#B68282

Complementary

Open in Harmony Studio

−30°#699F8A
Base#5F9EA0
+30°#669AB1

Analogous

Open in Harmony Studio

Base#5F9EA0
+120°#A385AB
+240°#A78D64

Triadic

Open in Harmony Studio

Base#5F9EA0
+150°#B08298
+210°#B3866F

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-cadetblue: #5f9ea0;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        cadetblue: '#5f9ea0',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-cadetblue: oklch(0.658 0.065 198.3);
}

Design token (W3C DTCG)

{
  "color": {
    "cadetblue": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.3725, 0.6196, 0.6275],
        "hex": "#5f9ea0"
      },
      "$description": "CSS named color cadetblue"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let cadetblue = Color(.sRGB, red: 0.373, green: 0.620, blue: 0.627, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Cadetblue = Color(0xFF5F9EA0)
}

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.

Tools

Open #5F9EA0 in the tools

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

Cadet Blue #5F9EA0

#5F9EA0 color codes

Contrast: is #5F9EA0 accessible?

Black text on it

White text on it

As text on black

As text on white

Nearest versions that pass 4.5:1

Adjust #5F9EA0 live

Shades and tints of #5F9EA0

How vivid #5F9EA0 can get

Mixing #5F9EA0

#5F9EA0 in an interface

How #5F9EA0 looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #5F9EA0

Complementary

Analogous

Triadic

Split-complementary

Design tokens

CSS custom property

Tailwind config

Tailwind v4 theme

Design token (W3C DTCG)

SwiftUI color

Jetpack Compose color

The nearest match in each system

Similar colors

Open #5F9EA0 in the tools