CSS named color

Sea Green #2E8B57

The CSS keyword seagreen is #2E8B57. It is a soft green in the green family. In OKLCH it sits at lightness 0.569, chroma 0.119 and hue 154.9°.

Relative luminance: 0.1973
OKLCH L · C · h: 0.569 · 0.119 · 154.9
Best text: Black 4.94:1
Hue family: Green

Inspect this color Check contrast

#2E8B57 color codes

HEX: #2E8B57
RGB: rgb(46, 139, 87)
HSL: hsl(146, 50%, 36%)
OKLCH: oklch(0.569 0.119 154.9)
OKLab: oklab(0.569 -0.108 0.050)
CIELAB (D65): L* 51.53, a* -39.72, b* 20.05
XYZ (D65): X 12.08, Y 19.73, Z 12.19
CMYK (naive): cmyk(67%, 0%, 37%, 45%)

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 #2E8B57 accessible?

Black text on it reaches 4.94:1, passing AA. White text manages only 4.24:1, 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

4.94:1
- AA passes
- AA large passes
- AAA fails
- APCA Lc +35
White text on it

4.24:1
- AA fails
- AA large passes
- AAA fails
- APCA Lc −74
As text on black

4.94:1
- AA passes
- AA large passes
- AAA fails
- APCA Lc −32
As text on white

4.24:1
- AA fails
- AA large passes
- AAA fails
- APCA Lc +68

Nearest versions that pass 4.5:1

For text on white

#288653 4.54:1

Darkening its OKLCH lightness from 0.57 to 0.55 reaches 4.54:1 on white, keeping the hue.

Compare both in the Contrast System
For text on black

#2E8B57 4.94:1

It already reaches 4.94:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #2E8B57 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 #2E8B57

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #2E8B57 sits at step 600.

50#DEFFE8

White
1.07
Black
19.57
100#B7FFCF

White
1.15
Black
18.21
200#9FECB9

White
1.38
Black
15.17
300#80D39E

White
1.79
Black
11.72
400#60B781

White
2.44
Black
8.58
500#409B66

White
3.44
Black
6.09
600This color#2E8B57

White
4.24
Black
4.94
700#006A3A

White
6.72
Black
3.12
800#004D29

White
10.03
Black
2.09
900#003219

White
14.28
Black
1.47
950#001C0B

White
17.93
Black
1.17

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

Gamut

How vivid #2E8B57 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.141; #2E8B57 uses 84% of it. Display P3, which many recent phones and laptops show, reaches 0.195 there: 39% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.119
sRGB edge: 0.141
Display P3 edge: 0.195
Rec. 2020 edge: 0.305
Dominant wavelength: 531 nm
Excitation purity: 25%
Chromaticity: x 0.2745, y 0.4485

This color#2E8B57
Most vivid in sRGB#008E50
Most vivid in Display P3oklch(0.569 0.195 154.9)

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

Use the wider color where screens show it

.accent {
  color: #2e8b57;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0 0.575 0.2796); }
}

Mixing

Mixing #2E8B57

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%#97C5AB
OKLab50%#9BC5A8
OKLCH50%#9BC5A8

Black #000000

sRGB50%#17462C
OKLab50%#0B321C
OKLCH50%#0B321C

Its complement #A15A93

sRGB50%#687375
OKLab50%#777777
OKLCH50%#2D7DB8

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #2e8b57, white);
color: color-mix(in oklch, #2e8b57 50%, white);

In use

#2E8B57 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, 4.5:14.94:1 Passes
Link and body-size textText, 4.5:14.24:1 Fails
Large headingLarge text, 3:14.24:1 Passes
Icons, borders and focus ringsNon-text, 3:14.24:1 Passes

For text on this page, the nearest shade that passes is #288653 4.54:1

Dark page

Button labelText, 4.5:14.94:1 Passes
Link and body-size textText, 4.5:14.41:1 Fails
Large headingLarge text, 3:14.41:1 Passes
Icons, borders and focus ringsNon-text, 3:14.41:1 Passes

For text on this page, the nearest shade that passes is #308D58 4.52:1

Color vision

How #2E8B57 looks with color blindness

Achromatopsia changes it most, ΔE2000 24.1; tritanopia changes it least, 13.0.

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

#8B8054 ΔE2000 21.6

Distinct

Reads as muted amber
Deuteranopia

No working green (medium-wavelength) cones

#7F775A ΔE2000 21.2

Distinct

Reads as grayish amber
Tritanopia

No working blue (short-wavelength) cones

#008A7E ΔE2000 13.0

Distinct

Reads as soft cyan
Achromatopsia

No cone color vision; lightness only

#7B7B7B ΔE2000 24.1

Distinct

Reads as gray

Pairing check

Checked against its complement, #A15A93. Their lightness contrast is only 1.12:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#2E8B57 · #A15A93	62.3	Stays distinct
Protanopia	#8B8054 · #5A6C95	35.9	Stays distinct
Deuteranopia	#7F775A · #6D7691	26.2	Stays distinct
Tritanopia	#008A7E · #A75D70	51.5	Stays distinct
Achromatopsia	#7B7B7B · #737373	3.2	Easily confused

Harmony

Color harmonies for #2E8B57

Its complement is #A15A93, a soft magenta.

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

Open the Harmony Studio

Base#2E8B57
Complement#A15A93

Complementary

Open in Harmony Studio

−30°#67832B
Base#2E8B57
+30°#008A7F

Analogous

Open in Harmony Studio

Base#2E8B57
+120°#6370BC
+240°#B15A45

Triadic

Open in Harmony Studio

Base#2E8B57
+150°#8763AF
+210°#AF566E

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-seagreen: #2e8b57;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        seagreen: '#2e8b57',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-seagreen: oklch(0.569 0.119 154.9);
}

Design token (W3C DTCG)

{
  "color": {
    "seagreen": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.1804, 0.5451, 0.3412],
        "hex": "#2e8b57"
      },
      "$description": "CSS named color seagreen"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let seagreen = Color(.sRGB, red: 0.180, green: 0.545, blue: 0.341, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Seagreen = Color(0xFF2E8B57)
}

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 #2E8B57 in the tools

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

Sea Green #2E8B57

#2E8B57 color codes

Contrast: is #2E8B57 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 #2E8B57 live

Shades and tints of #2E8B57

How vivid #2E8B57 can get

Mixing #2E8B57

#2E8B57 in an interface

How #2E8B57 looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #2E8B57

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 #2E8B57 in the tools