Tailwind CSS v3 color

Tailwind teal-950 #042F2E

Tailwind CSS v3's teal-950 is #042F2E. It is a very dark grayish teal in the cyan family. In OKLCH it sits at lightness 0.277, chroma 0.045 and hue 192.5°. The nearest CSS named color is darkslategray (#2F4F4F), ΔE2000 10.7 away.

Relative luminance: 0.0226
OKLCH L · C · h: 0.277 · 0.045 · 192.5
Best text: White 14.47:1
Hue family: Cyan

Inspect this color Check contrast

#042F2E color codes

HEX: #042F2E
RGB: rgb(4, 47, 46)
HSL: hsl(179, 84%, 10%)
OKLCH: oklch(0.277 0.045 192.5)
OKLab: oklab(0.277 -0.044 -0.010)
CIELAB (D65): L* 16.78, a* -14.23, b* -3.47
XYZ (D65): X 1.56, Y 2.26, Z 2.94
CMYK (naive): cmyk(91%, 0%, 2%, 82%)

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 #042F2E accessible?

White text on it reaches 14.47:1, passing AAA. Black text fails at 1.45:1.

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

1.45:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc 0
Text is here, unreadable at 1.45:1
White text on it

14.47:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −103
As text on black

1.45:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc 0
Text is here, unreadable at 1.45:1
As text on white

14.47:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +101

Nearest versions that pass 4.5:1

For text on white

#042F2E 14.47:1

It already reaches 14.47:1 on white, so no change is needed.
For text on black

#547C7B 4.54:1

Lightening its OKLCH lightness from 0.28 to 0.56 reaches 4.54:1 on black, keeping the hue.

Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #042F2E 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 #042F2E

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #042F2E sits at step 900.

50#DBFDFB

White
1.07
Black
19.45
100#D0F4F2

White
1.17
Black
17.90
200#BBE0DE

White
1.41
Black
14.83
300#9FC7C5

White
1.83
Black
11.44
400#82ABA9

White
2.51
Black
8.34
500#678F8D

White
3.56
Black
5.89
600#507775

White
4.95
Black
4.23
700#3A605E

White
6.96
Black
3.01
800#234745

White
10.20
Black
2.05
900This color#042F2E

White
14.47
Black
1.45
950#001B1A

White
17.92
Black
1.17

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

Tailwind CSS v3 teal scale

The real Tailwind palette, for comparison with the computed ramp above.

50#F0FDFA
White
1.04
Black
20.13
100#CCFBF1
White
1.12
Black
18.63
200#99F6E4
White
1.26
Black
16.65
300#5EEAD4
White
1.47
Black
14.19
400#2DD4BF
White
1.86
Black
11.28
500#14B8A6
White
2.48
Black
8.43
600#0D9488
White
3.74
Black
5.60
700#0F766E
White
5.47
Black
3.83
800#115E59
White
7.58
Black
2.76
900#134E4A
White
9.47
Black
2.21
950This color#042F2E

White
14.47
Black
1.45

Gamut

How vivid #042F2E can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.048; #042F2E uses 93% of it. Display P3, which many recent phones and laptops show, reaches 0.064 there: 35% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.045
sRGB edge: 0.048
Display P3 edge: 0.064
Rec. 2020 edge: 0.104
Dominant wavelength: 492 nm
Excitation purity: 30%
Chromaticity: x 0.2309, y 0.3341

This color#042F2E
Most vivid in sRGB#002F2E
Most vivid in Display P3oklch(0.277 0.064 192.5)

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

Use the wider color where screens show it

.accent {
  color: #042f2e;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0 0.1899 0.1885); }
}

Mixing

Mixing #042F2E

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%#829797
OKLab50%#7D908F
OKLCH50%#7D908F

Black #000000

sRGB50%#021817
OKLab50%#010C0B
OKLCH50%#010C0B

Its complement #3B1F22

sRGB50%#202728
OKLab50%#282828
OKLCH50%#2C290D

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #042f2e, white);
color: color-mix(in oklch, #042f2e 50%, white);

In use

#042F2E 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, 4.5:114.47:1 Passes
Link and body-size textText, 4.5:114.47:1 Passes
Large headingLarge text, 3:114.47:1 Passes
Icons, borders and focus ringsNon-text, 3:114.47:1 Passes

Dark page

Button labelText, 4.5:114.47:1 Passes
Link and body-size textText, 4.5:11.29:1 Fails
Large headingLarge text, 3:11.29:1 Fails
Icons, borders and focus ringsNon-text, 3:11.29:1 Fails

For text on this page, the nearest shade that passes is #5C8482 4.52:1

Color vision

How #042F2E looks with color blindness

Deuteranopia changes it most, ΔE2000 14.8; tritanopia changes it least, 1.3.

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

#2B2C2E ΔE2000 14.5

Distinct

Reads as near-black
Deuteranopia

No working green (medium-wavelength) cones

#25282E ΔE2000 14.8

Distinct

Reads as near-black
Tritanopia

No working blue (short-wavelength) cones

#00312F ΔE2000 1.3

Very close

Reads as very dark grayish teal
Achromatopsia

No cone color vision; lightness only

#292929 ΔE2000 14.5

Distinct

Reads as near-black

Pairing check

Checked against its complement, #3B1F22. Their lightness contrast is only 1.03:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#042F2E · #3B1F22	33.5	Stays distinct
Protanopia	#2B2C2E · #242422	3.8	Easily confused
Deuteranopia	#25282E · #2B2921	9.4	Harder to tell apart
Tritanopia	#00312F · #401C20	37.3	Stays distinct
Achromatopsia	#292929 · #272727	0.6	Easily confused

Harmony

Color harmonies for #042F2E

Its complement is #3B1F22, a very dark grayish wine, 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#042F2E
Complement#3B1F22

Complementary

Open in Harmony Studio

−30°#102F22
Base#042F2E
+30°#082D38

Analogous

Open in Harmony Studio

Base#042F2E
+120°#302238
+240°#36240D

Triadic

Open in Harmony Studio

Base#042F2E
+150°#371F2E
+210°#3B2016

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-teal-950: #042f2e;
}

Tailwind config

// tailwind.config.js — already built in as teal-950;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        teal: { 950: '#042f2e' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own teal-950; this pins the v3 value. */
  --color-teal-950: oklch(0.277 0.045 192.5);
}

Design token (W3C DTCG)

{
  "color": {
    "teal-950": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.0157, 0.1843, 0.1804],
        "hex": "#042f2e"
      },
      "$description": "Tailwind CSS v3 teal-950"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let teal950 = Color(.sRGB, red: 0.016, green: 0.184, blue: 0.180, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Teal950 = Color(0xFF042F2E)
}

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 #042F2E in the tools

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

Tailwind teal-950 #042F2E

#042F2E color codes

Contrast: is #042F2E 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 #042F2E live

Shades and tints of #042F2E

Tailwind CSS v3 teal scale

How vivid #042F2E can get

Mixing #042F2E

#042F2E in an interface

How #042F2E looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #042F2E

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 #042F2E in the tools