CSS named color

Medium Sea Green #3CB371

The CSS keyword mediumseagreen is #3CB371. It is a light soft green in the green family. In OKLCH it sits at lightness 0.684, chroma 0.144 and hue 155.0°.

Relative luminance: 0.3439
OKLCH L · C · h: 0.684 · 0.144 · 155.0
Best text: Black 7.87:1
Hue family: Green

Inspect this color Check contrast

#3CB371 color codes

HEX: #3CB371
RGB: rgb(60, 179, 113)
HSL: hsl(147, 50%, 47%)
OKLCH: oklch(0.684 0.144 155.0)
OKLab: oklab(0.684 -0.131 0.061)
CIELAB (D65): L* 65.27, a* -48.22, b* 24.29
XYZ (D65): X 20.96, Y 34.39, Z 21.15
CMYK (naive): cmyk(66%, 0%, 37%, 30%)

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 #3CB371 accessible?

Black text on it reaches 7.87:1, passing AAA. White text fails at 2.66:1.

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

7.87:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +52
White text on it

2.66:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc −56
As text on black

7.87:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −50
As text on white

2.66:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc +51

Nearest versions that pass 4.5:1

For text on white

#00884C 4.53:1

Darkening its OKLCH lightness from 0.68 to 0.55 reaches 4.53:1 on white, keeping the hue.

Compare both in the Contrast System
For text on black

#3CB371 7.87:1

It already reaches 7.87:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #3CB371 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 #3CB371

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #3CB371 sits at step 400.

50#DEFFE8

White
1.07
Black
19.57
100#B7FFCF

White
1.15
Black
18.21
200#8FF0B3

White
1.37
Black
15.28
300#6ED797

White
1.77
Black
11.83
400This color#3CB371

White
2.66
Black
7.87
500#1F9F5E

White
3.39
Black
6.17
600#00844A

White
4.77
Black
4.39
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 #3CB371 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.169; #3CB371 uses 85% of it. Display P3, which many recent phones and laptops show, reaches 0.234 there: 39% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.144
sRGB edge: 0.169
Display P3 edge: 0.234
Rec. 2020 edge: 0.367
Dominant wavelength: 531 nm
Excitation purity: 25%
Chromaticity: x 0.2740, y 0.4495

This color#3CB371
Most vivid in sRGB#00B769
Most vivid in Display P3oklch(0.684 0.234 155.0)

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

Use the wider color where screens show it

.accent {
  color: #3cb371;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0 0.7389 0.3676); }
}

Mixing

Mixing #3CB371

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%#9ED9B8
OKLab50%#A6DAB7
OKLCH50%#A6DAB7

Black #000000

sRGB50%#1E5A39
OKLab50%#114327
OKLCH50%#114327

Its complement #CF75BD

sRGB50%#869497
OKLab50%#999A9A
OKLCH50%#3CA1EC

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #3cb371, white);
color: color-mix(in oklch, #3cb371 50%, white);

In use

#3CB371 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, 4.5:17.87:1 Passes
Link and body-size textText, 4.5:12.66:1 Fails
Large headingLarge text, 3:12.66:1 Fails
Icons, borders and focus ringsNon-text, 3:12.66:1 Fails

For text on this page, the nearest shade that passes is #00884C 4.53:1

Dark page

Button labelText, 4.5:17.87:1 Passes
Link and body-size textText, 4.5:17.02:1 Passes
Large headingLarge text, 3:17.02:1 Passes
Icons, borders and focus ringsNon-text, 3:17.02:1 Passes

Color vision

How #3CB371 looks with color blindness

Achromatopsia changes it most, ΔE2000 25.2; tritanopia changes it least, 14.5.

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

#B2A56D ΔE2000 23.6

Distinct

Reads as light muted amber
Deuteranopia

No working green (medium-wavelength) cones

#A39A75 ΔE2000 22.7

Distinct

Reads as light muted amber
Tritanopia

No working blue (short-wavelength) cones

#00B1A2 ΔE2000 14.5

Distinct

Reads as light soft cyan
Achromatopsia

No cone color vision; lightness only

#9E9E9E ΔE2000 25.2

Distinct

Reads as gray

Pairing check

Checked against its complement, #CF75BD. Their lightness contrast is only 1.13:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#3CB371 · #CF75BD	71.0	Stays distinct
Protanopia	#B2A56D · #758CC0	40.5	Stays distinct
Deuteranopia	#A39A75 · #8D99BA	29.8	Stays distinct
Tritanopia	#00B1A2 · #D77990	58.0	Stays distinct
Achromatopsia	#9E9E9E · #949494	3.2	Easily confused

Harmony

Color harmonies for #3CB371

Its complement is #CF75BD, a light soft magenta.

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

Open the Harmony Studio

Base#3CB371
Complement#CF75BD

Complementary

Open in Harmony Studio

−30°#85A838
Base#3CB371
+30°#00B1A3

Analogous

Open in Harmony Studio

Base#3CB371
+120°#8090F1
+240°#E4755A

Triadic

Open in Harmony Studio

Base#3CB371
+150°#AE80E0
+210°#E1708D

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-mediumseagreen: #3cb371;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        mediumseagreen: '#3cb371',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-mediumseagreen: oklch(0.684 0.144 155.0);
}

Design token (W3C DTCG)

{
  "color": {
    "mediumseagreen": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.2353, 0.702, 0.4431],
        "hex": "#3cb371"
      },
      "$description": "CSS named color mediumseagreen"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let mediumseagreen = Color(.sRGB, red: 0.235, green: 0.702, blue: 0.443, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Mediumseagreen = Color(0xFF3CB371)
}

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 #3CB371 in the tools

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

Medium Sea Green #3CB371

#3CB371 color codes

Contrast: is #3CB371 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 #3CB371 live

Shades and tints of #3CB371

How vivid #3CB371 can get

Mixing #3CB371

#3CB371 in an interface

How #3CB371 looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #3CB371

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 #3CB371 in the tools