Tailwind CSS v3 color

Tailwind green-800 #166534

Tailwind CSS v3's green-800 is #166534. It is a dark soft green in the green family. In OKLCH it sits at lightness 0.448, chroma 0.108 and hue 151.3°. The nearest CSS named color is darkgreen (#006400), ΔE2000 8.1 away.

Relative luminance
0.0973
OKLCH L · C · h
0.448 · 0.108 · 151.3
Best text
White 7.13:1
Hue family
Green
Inspect this color Check contrast

#166534 color codes

HEX
#166534
RGB
rgb(22, 101, 52)
HSL
hsl(143, 64%, 24%)
OKLCH
oklch(0.448 0.108 151.3)
OKLab
oklab(0.448 -0.095 0.052)
CIELAB (D65)
L* 37.34, a* -35.33, b* 21.18
XYZ (D65)
X 5.60, Y 9.73, Z 4.83
CMYK (naive)
cmyk(78%, 0%, 49%, 60%)

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 #166534 accessible?

White text on it reaches 7.13:1, passing AAA. Black text fails at 2.94:1.

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

    2.94:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc +19

  • White text on it

    7.13:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −89

  • As text on black

    2.94:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc −17

  • As text on white

    7.13:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +84

Nearest versions that pass 4.5:1

  • For text on white

    #166534 7.13:1

    It already reaches 7.13:1 on white, so no change is needed.

  • For text on black

    #398350 4.53:1

    Lightening its OKLCH lightness from 0.45 to 0.55 reaches 4.53:1 on black, keeping the hue.

    Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #166534 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 #166534

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #166534 sits at step 700.

  1. 50#DFFFE5
    White
    1.07
    Black
    19.57
  2. 100#BFFDCD
    White
    1.15
    Black
    18.14
  3. 200#A9EAB8
    White
    1.38
    Black
    15.14
  4. 300#8CD19D
    White
    1.79
    Black
    11.72
  5. 400#6DB580
    White
    2.44
    Black
    8.57
  6. 500#509964
    White
    3.45
    Black
    6.08
  7. 600#37804E
    White
    4.81
    Black
    4.36
  8. 700This color#166534
    White
    7.13
    Black
    2.94
  9. 800#004E23
    White
    9.93
    Black
    2.11
  10. 900#003314
    White
    14.15
    Black
    1.48
  11. 950#001D08
    White
    17.80
    Black
    1.17

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

Tailwind CSS v3 green scale

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

  1. 50#F0FDF4
    White
    1.04
    Black
    20.06
  2. 100#DCFCE7
    White
    1.09
    Black
    19.12
  3. 200#BBF7D0
    White
    1.21
    Black
    17.32
  4. 300#86EFAC
    White
    1.40
    Black
    14.95
  5. 400#4ADE80
    White
    1.74
    Black
    12.05
  6. 500#22C55E
    White
    2.27
    Black
    9.21
  7. 600#16A34A
    White
    3.29
    Black
    6.37
  8. 700#15803D
    White
    5.01
    Black
    4.18
  9. 800This color#166534
    White
    7.13
    Black
    2.94
  10. 900#14532D
    White
    9.11
    Black
    2.30
  11. 950#052E16
    White
    14.90
    Black
    1.40

Gamut

How vivid #166534 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.120; #166534 uses 90% of it. Display P3, which many recent phones and laptops show, reaches 0.167 there: 39% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.108
sRGB edge
0.120
Display P3 edge
0.167
Rec. 2020 edge
0.242
Dominant wavelength
538 nm
Excitation purity
35%
Chromaticity
x 0.2780, y 0.4824
  • This color#166534
  • Most vivid in sRGB#006630
  • Most vivid in Display P3oklch(0.448 0.167 151.3)

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

Use the wider color where screens show it
.accent {
  color: #166534;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0 0.4153 0.1498); }
}

Mixing

Mixing #166534

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%#8BB29A
  • OKLab50%#8EB095
  • OKLCH50%#8EB095

Black #000000

  • sRGB50%#0B331A
  • OKLab50%#03220E
  • OKLCH50%#03220E

Its complement #763B70

  • sRGB50%#465052
  • OKLab50%#555455
  • OKLCH50%#005A89
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #166534, white);
color: color-mix(in oklch, #166534 50%, white);

In use

#166534 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, 4.5:17.13:1 Passes
  • Link and body-size textText, 4.5:17.13:1 Passes
  • Large headingLarge text, 3:17.13:1 Passes
  • Icons, borders and focus ringsNon-text, 3:17.13:1 Passes

Dark page

  • Button labelText, 4.5:17.13:1 Passes
  • Link and body-size textText, 4.5:12.62:1 Fails
  • Large headingLarge text, 3:12.62:1 Fails
  • Icons, borders and focus ringsNon-text, 3:12.62:1 Fails

For text on this page, the nearest shade that passes is #428C58 4.57:1

Color vision

How #166534 looks with color blindness

Achromatopsia changes it most, ΔE2000 23.5; tritanopia changes it least, 13.3.

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

    #655C30 ΔE2000 19.8

    Distinct

    Reads as dark muted brown

  • Deuteranopia

    No working green (medium-wavelength) cones

    #5C5537 ΔE2000 19.5

    Distinct

    Reads as dark grayish brown

  • Tritanopia

    No working blue (short-wavelength) cones

    #006359 ΔE2000 13.3

    Distinct

    Reads as dark muted teal

  • Achromatopsia

    No cone color vision; lightness only

    #585858 ΔE2000 23.5

    Distinct

    Reads as dark gray

Pairing check

Checked against its complement, #763B70. Their lightness contrast is only 1.11:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#166534 · #763B7058.8Stays distinct
Protanopia#655C30 · #394B7236.3Stays distinct
Deuteranopia#5C5537 · #49546E27.2Stays distinct
Tritanopia#006359 · #7A3F5046.6Stays distinct
Achromatopsia#585858 · #5151512.5Easily confused

Harmony

Color harmonies for #166534

Its complement is #763B70, a dark soft magenta.

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

Open the Harmony Studio
  • Base#166534
  • Complement#763B70

Complementary

Open in Harmony Studio
  • −30°#4C5D00
  • Base#166534
  • +30°#006357

Analogous

Open in Harmony Studio
  • Base#166534
  • +120°#3F4F90
  • +240°#863A2D

Triadic

Open in Harmony Studio
  • Base#166534
  • +150°#604486
  • +210°#833751

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-green-800: #166534;
}

Tailwind config

// tailwind.config.js — already built in as green-800;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        green: { 800: '#166534' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own green-800; this pins the v3 value. */
  --color-green-800: oklch(0.448 0.108 151.3);
}

Design token (W3C DTCG)

{
  "color": {
    "green-800": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.0863, 0.3961, 0.2039],
        "hex": "#166534"
      },
      "$description": "Tailwind CSS v3 green-800"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let green800 = Color(.sRGB, red: 0.086, green: 0.396, blue: 0.204, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Green800 = Color(0xFF166534)
}

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 #166534 in the tools

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