Tailwind CSS v3 color

Tailwind emerald-400 #34D399

Tailwind CSS v3's emerald-400 is #34D399. It is a light soft green in the green family. In OKLCH it sits at lightness 0.773, chroma 0.153 and hue 163.2°. The nearest CSS named color is mediumaquamarine (#66CDAA), ΔE2000 6.0 away.

Relative luminance
0.4962
OKLCH L · C · h
0.773 · 0.153 · 163.2
Best text
Black 10.92:1
Hue family
Green
Inspect this color Check contrast

#34D399 color codes

HEX
#34D399
RGB
rgb(52, 211, 153)
HSL
hsl(158, 64%, 52%)
OKLCH
oklch(0.773 0.153 163.2)
OKLab
oklab(0.773 -0.147 0.044)
CIELAB (D65)
L* 75.83, a* -53.68, b* 17.39
XYZ (D65)
X 30.46, Y 49.61, Z 38.10
CMYK (naive)
cmyk(75%, 0%, 27%, 17%)

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 #34D399 accessible?

Black text on it reaches 10.92:1, passing AAA. White text fails at 1.92:1.

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

    10.92:1

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

  • White text on it

    1.92:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc −40

  • As text on black

    10.92:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −66

  • As text on white

    1.92:1

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

Nearest versions that pass 4.5:1

  • For text on white

    #00875E 4.53:1

    Darkening its OKLCH lightness from 0.77 to 0.55 reaches 4.53:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #34D399 10.92:1

    It already reaches 10.92:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #34D399 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 #34D399

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #34D399 sits at step 300.

  1. 50#DCFFED
    White
    1.07
    Black
    19.57
  2. 100#B2FFDA
    White
    1.15
    Black
    18.20
  3. 200#78F3BE
    White
    1.36
    Black
    15.36
  4. 300This color#34D399
    White
    1.92
    Black
    10.92
  5. 400#10BE86
    White
    2.40
    Black
    8.73
  6. 500#009E6F
    White
    3.43
    Black
    6.12
  7. 600#00835B
    White
    4.77
    Black
    4.39
  8. 700#006948
    White
    6.74
    Black
    3.11
  9. 800#004C33
    White
    10.08
    Black
    2.08
  10. 900#003220
    White
    14.21
    Black
    1.47
  11. 950#001C10
    White
    17.89
    Black
    1.17

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

Tailwind CSS v3 emerald scale

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

  1. 50#ECFDF5
    White
    1.05
    Black
    19.93
  2. 100#D1FAE5
    White
    1.13
    Black
    18.51
  3. 200#A7F3D0
    White
    1.28
    Black
    16.37
  4. 300#6EE7B7
    White
    1.52
    Black
    13.77
  5. 400This color#34D399
    White
    1.92
    Black
    10.92
  6. 500#10B981
    White
    2.53
    Black
    8.27
  7. 600#059669
    White
    3.76
    Black
    5.57
  8. 700#047857
    White
    5.48
    Black
    3.82
  9. 800#065F46
    White
    7.68
    Black
    2.73
  10. 900#064E3B
    White
    9.71
    Black
    2.16
  11. 950#022C22
    White
    15.15
    Black
    1.38

Gamut

How vivid #34D399 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.167; #34D399 uses 92% of it. Display P3, which many recent phones and laptops show, reaches 0.229 there: 37% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.153
sRGB edge
0.167
Display P3 edge
0.229
Rec. 2020 edge
0.359
Dominant wavelength
514 nm
Excitation purity
20%
Chromaticity
x 0.2577, y 0.4198
  • This color#34D399
  • Most vivid in sRGB#00D596
  • Most vivid in Display P3oklch(0.773 0.229 163.2)

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

Use the wider color where screens show it
.accent {
  color: #34d399;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0 0.8593 0.5672); }
}

Mixing

Mixing #34D399

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%#9AE9CC
  • OKLab50%#ABEACB
  • OKLCH50%#ABEACB

Black #000000

  • sRGB50%#1A6A4D
  • OKLab50%#0E5138
  • OKLCH50%#0E5138

Its complement #F78BCE

  • sRGB50%#96AFB4
  • OKLab50%#B5B5B5
  • OKLCH50%#EFA42A
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #34d399, white);
color: color-mix(in oklch, #34d399 50%, white);

In use

#34D399 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, 4.5:110.92:1 Passes
  • Link and body-size textText, 4.5:11.92:1 Fails
  • Large headingLarge text, 3:11.92:1 Fails
  • Icons, borders and focus ringsNon-text, 3:11.92:1 Fails

For text on this page, the nearest shade that passes is #00875E 4.53:1

Dark page

  • Button labelText, 4.5:110.92:1 Passes
  • Link and body-size textText, 4.5:19.74:1 Passes
  • Large headingLarge text, 3:19.74:1 Passes
  • Icons, borders and focus ringsNon-text, 3:19.74:1 Passes

Color vision

How #34D399 looks with color blindness

Achromatopsia changes it most, ΔE2000 25.6; tritanopia changes it least, 11.8.

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

    #CFC396 ΔE2000 25.6

    Distinct

    Reads as light muted amber

  • Deuteranopia

    No working green (medium-wavelength) cones

    #BCB59D ΔE2000 24.8

    Distinct

    Reads as light grayish amber

  • Tritanopia

    No working blue (short-wavelength) cones

    #00D3C3 ΔE2000 11.8

    Distinct

    Reads as light soft cyan

  • Achromatopsia

    No cone color vision; lightness only

    #BBBBBB ΔE2000 25.6

    Distinct

    Reads as light gray

Pairing check

Checked against its complement, #F78BCE. Their lightness contrast is only 1.14:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#34D399 · #F78BCE53.0Stays distinct
Protanopia#CFC396 · #92A4D035.5Stays distinct
Deuteranopia#BCB59D · #AEB5CB21.1Stays distinct
Tritanopia#00D3C3 · #FF8BA463.5Stays distinct
Achromatopsia#BBBBBB · #AFAFAF3.3Easily confused

Harmony

Color harmonies for #34D399

Its complement is #F78BCE, a light soft magenta, 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#34D399
  • Complement#F78BCE

Complementary

Open in Harmony Studio
  • −30°#8DCA5E
  • Base#34D399
  • +30°#00CFCD

Analogous

Open in Harmony Studio
  • Base#34D399
  • +120°#ABABFF
  • +240°#FF9568

Triadic

Open in Harmony Studio
  • Base#34D399
  • +150°#D796FA
  • +210°#FF8F9C

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-emerald-400: #34d399;
}

Tailwind config

// tailwind.config.js — already built in as emerald-400;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        emerald: { 400: '#34d399' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own emerald-400; this pins the v3 value. */
  --color-emerald-400: oklch(0.773 0.153 163.2);
}

Design token (W3C DTCG)

{
  "color": {
    "emerald-400": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.2039, 0.8275, 0.6],
        "hex": "#34d399"
      },
      "$description": "Tailwind CSS v3 emerald-400"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let emerald400 = Color(.sRGB, red: 0.204, green: 0.827, blue: 0.600, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Emerald400 = Color(0xFF34D399)
}

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 #34D399 in the tools

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