Tailwind CSS v3 color

Tailwind emerald-500 #10B981

Tailwind CSS v3's emerald-500 is #10B981. It is a light soft green in the green family. In OKLCH it sits at lightness 0.696, chroma 0.149 and hue 162.5°. The nearest CSS named color is mediumseagreen (#3CB371), ΔE2000 3.9 away.

Relative luminance: 0.3639
OKLCH L · C · h: 0.696 · 0.149 · 162.5
Best text: Black 8.27:1
Hue family: Green

Inspect this color Check contrast

#10B981 color codes

HEX: #10B981
RGB: rgb(16, 185, 129)
HSL: hsl(160, 84%, 39%)
OKLCH: oklch(0.696 0.149 162.5)
OKLab: oklab(0.696 -0.142 0.045)
CIELAB (D65): L* 66.82, a* -52.21, b* 17.68
XYZ (D65): X 21.52, Y 36.39, Z 26.65
CMYK (naive): cmyk(91%, 0%, 30%, 27%)

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 #10B981 accessible?

Black text on it reaches 8.27:1, passing AAA. White text fails at 2.53:1.

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

8.27:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +54
White text on it

2.53:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc −54
As text on black

8.27:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −52
As text on white

2.53:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc +49

Nearest versions that pass 4.5:1

For text on white

#00875C 4.54:1

Darkening its OKLCH lightness from 0.70 to 0.55 reaches 4.54:1 on white, keeping the hue.

Compare both in the Contrast System
For text on black

#10B981 8.27:1

It already reaches 8.27:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #10B981 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 #10B981

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #10B981 sits at step 400.

50#DCFFEC

White
1.07
Black
19.55
100#B3FFD9

White
1.15
Black
18.22
200#7DF3BE

White
1.36
Black
15.43
300#57D9A3

White
1.77
Black
11.85
400This color#10B981

White
2.53
Black
8.27
500#009F6D

White
3.39
Black
6.18
600#00835A

White
4.77
Black
4.39
700#006947

White
6.74
Black
3.11
800#004D33

White
9.95
Black
2.10
900#003220

White
14.21
Black
1.47
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.

50#ECFDF5
White
1.05
Black
19.93
100#D1FAE5
White
1.13
Black
18.51
200#A7F3D0
White
1.28
Black
16.37
300#6EE7B7
White
1.52
Black
13.77
400#34D399
White
1.92
Black
10.92
500This color#10B981

White
2.53
Black
8.27
600#059669
White
3.76
Black
5.57
700#047857
White
5.48
Black
3.82
800#065F46
White
7.68
Black
2.73
900#064E3B
White
9.71
Black
2.16
950#022C22
White
15.15
Black
1.38

Gamut

How vivid #10B981 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.152; #10B981 uses 98% of it. Display P3, which many recent phones and laptops show, reaches 0.208 there: 37% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.149
sRGB edge: 0.152
Display P3 edge: 0.208
Rec. 2020 edge: 0.327
Dominant wavelength: 515 nm
Excitation purity: 21%
Chromaticity: x 0.2545, y 0.4303

This color#10B981
Most vivid in sRGB#00B980
Most vivid in Display P3oklch(0.696 0.208 162.5)

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

Use the wider color where screens show it

.accent {
  color: #10b981;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0 0.7476 0.4822); }
}

Mixing

Mixing #10B981

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%#88DCC0
OKLab50%#A1DDBF
OKLCH50%#A1DDBF

Black #000000

sRGB50%#085D41
OKLab50%#02462E
OKLCH50%#02462E

Its complement #DB74B6

sRGB50%#76979C
OKLab50%#9D9D9D
OKLCH50%#D48C00

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #10b981, white);
color: color-mix(in oklch, #10b981 50%, white);

In use

#10B981 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, 4.5:18.27:1 Passes
Link and body-size textText, 4.5:12.53:1 Fails
Large headingLarge text, 3:12.53:1 Fails
Icons, borders and focus ringsNon-text, 3:12.53:1 Fails

For text on this page, the nearest shade that passes is #00875C 4.54:1

Dark page

Button labelText, 4.5:18.27:1 Passes
Link and body-size textText, 4.5:17.38:1 Passes
Large headingLarge text, 3:17.38:1 Passes
Icons, borders and focus ringsNon-text, 3:17.38:1 Passes

Color vision

How #10B981 looks with color blindness

Achromatopsia changes it most, ΔE2000 25.5; 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

#B6AA7E ΔE2000 25.4

Distinct

Reads as light muted amber
Deuteranopia

No working green (medium-wavelength) cones

#A49D85 ΔE2000 24.5

Distinct

Reads as light grayish amber
Tritanopia

No working blue (short-wavelength) cones

#00B9AA ΔE2000 11.8

Distinct

Reads as light soft cyan
Achromatopsia

No cone color vision; lightness only

#A3A3A3 ΔE2000 25.5

Distinct

Reads as gray

Pairing check

Checked against its complement, #DB74B6. Their lightness contrast is only 1.15:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#10B981 · #DB74B6	52.1	Stays distinct
Protanopia	#B6AA7E · #7A8DB8	35.7	Stays distinct
Deuteranopia	#A49D85 · #969DB3	21.6	Stays distinct
Tritanopia	#00B9AA · #E6748D	61.7	Stays distinct
Achromatopsia	#A3A3A3 · #979797	3.7	Easily confused

Harmony

Color harmonies for #10B981

Its complement is #DB74B6, 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#10B981
Complement#DB74B6

Complementary

Open in Harmony Studio

−30°#78B047
Base#10B981
+30°#00B4B1

Analogous

Open in Harmony Studio

Base#10B981
+120°#918FF6
+240°#E87A4C

Triadic

Open in Harmony Studio

Base#10B981
+150°#BD7FDF
+210°#EA7283

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-500: #10b981;
}

Tailwind config

// tailwind.config.js — already built in as emerald-500;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        emerald: { 500: '#10b981' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own emerald-500; this pins the v3 value. */
  --color-emerald-500: oklch(0.696 0.149 162.5);
}

Design token (W3C DTCG)

{
  "color": {
    "emerald-500": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.0627, 0.7255, 0.5059],
        "hex": "#10b981"
      },
      "$description": "Tailwind CSS v3 emerald-500"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let emerald500 = Color(.sRGB, red: 0.063, green: 0.725, blue: 0.506, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Emerald500 = Color(0xFF10B981)
}

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 #10B981 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 emerald-500 #10B981

#10B981 color codes

Contrast: is #10B981 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 #10B981 live

Shades and tints of #10B981

Tailwind CSS v3 emerald scale

How vivid #10B981 can get

Mixing #10B981

#10B981 in an interface

How #10B981 looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #10B981

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 #10B981 in the tools