Tailwind CSS v3 color

Tailwind emerald-50 #ECFDF5

Tailwind CSS v3's emerald-50 is #ECFDF5. It is a pale grayish green in the neutral family. In OKLCH it sits at lightness 0.979, chroma 0.021 and hue 166.1°. The nearest CSS named color is honeydew (#F0FFF0), ΔE2000 2.9 away.

Relative luminance
0.9468
OKLCH L · C · h
0.979 · 0.021 · 166.1
Best text
Black 19.93:1
Hue family
Neutral
Inspect this color Check contrast

#ECFDF5 color codes

HEX
#ECFDF5
RGB
rgb(236, 253, 245)
HSL
hsl(152, 81%, 96%)
OKLCH
oklch(0.979 0.021 166.1)
OKLab
oklab(0.979 -0.020 0.005)
CIELAB (D65)
L* 97.90, a* -6.99, b* 1.91
XYZ (D65)
X 86.20, Y 94.68, Z 100.10
CMYK (naive)
cmyk(7%, 0%, 3%, 1%)

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 #ECFDF5 accessible?

Black text on it reaches 19.93:1, passing AAA. White text fails at 1.05:1.

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

    19.93:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +102

  • White text on it

    1.05:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc 0

    Text is here, unreadable at 1.05:1

  • As text on black

    19.93:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −103

  • As text on white

    1.05:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc 0

    Text is here, unreadable at 1.05:1

Nearest versions that pass 4.5:1

  • For text on white

    #6B7A73 4.50:1

    Darkening its OKLCH lightness from 0.98 to 0.56 reaches 4.50:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #ECFDF5 19.93:1

    It already reaches 19.93:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #ECFDF5 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 #ECFDF5

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #ECFDF5 sits at step 50.

  1. 50This color#ECFDF5
    White
    1.05
    Black
    19.93
  2. 100#E1EFE8
    White
    1.18
    Black
    17.71
  3. 200#CDDCD5
    White
    1.41
    Black
    14.79
  4. 300#B3C2BB
    White
    1.85
    Black
    11.35
  5. 400#96A69F
    White
    2.54
    Black
    8.25
  6. 500#7B8A83
    White
    3.61
    Black
    5.80
  7. 600#64736C
    White
    4.98
    Black
    4.21
  8. 700#4E5C55
    White
    7.03
    Black
    2.98
  9. 800#37433D
    White
    10.33
    Black
    2.03
  10. 900#212C27
    White
    14.44
    Black
    1.45
  11. 950#0F1814
    White
    18.08
    Black
    1.16

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. 50This color#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. 400#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 #ECFDF5 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.029; #ECFDF5 uses 71% of it. Display P3, which many recent phones and laptops show, reaches 0.033 there: 13% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.021
sRGB edge
0.029
Display P3 edge
0.033
Rec. 2020 edge
0.039
Dominant wavelength
None, near white
Excitation purity
2%
Chromaticity
x 0.3068, y 0.3370
  • This color#ECFDF5
  • Most vivid in sRGB#E7FFF4
  • Most vivid in Display P3oklch(0.979 0.033 166.1)

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

Use the wider color where screens show it
.accent {
  color: #ecfdf5;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.9163 1 0.9563); }
}

Mixing

Mixing #ECFDF5

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%#F6FEFA
  • OKLab50%#F6FEFA
  • OKLCH50%#F6FEFA

Black #000000

  • sRGB50%#767F7B
  • OKLab50%#5B625F
  • OKLCH50%#5B625F

Its complement #FFF5FA

  • sRGB50%#F6F9F8
  • OKLab50%#F6F9F8
  • OKLCH50%#F4F9FF
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #ecfdf5, white);
color: color-mix(in oklch, #ecfdf5 50%, white);

In use

#ECFDF5 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, 4.5:119.93:1 Passes
  • Link and body-size textText, 4.5:11.05:1 Fails
  • Large headingLarge text, 3:11.05:1 Fails
  • Icons, borders and focus ringsNon-text, 3:11.05:1 Fails

For text on this page, the nearest shade that passes is #6B7A73 4.50:1

Dark page

  • Button labelText, 4.5:119.93:1 Passes
  • Link and body-size textText, 4.5:117.78:1 Passes
  • Large headingLarge text, 3:117.78:1 Passes
  • Icons, borders and focus ringsNon-text, 3:117.78:1 Passes

Color vision

How #ECFDF5 looks with color blindness

Achromatopsia changes it most, ΔE2000 8.6; tritanopia changes it least, 2.8.

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

    #FCFAF5 ΔE2000 8.3

    Noticeable

    Reads as white

  • Deuteranopia

    No working green (medium-wavelength) cones

    #F9F8F5 ΔE2000 8.2

    Noticeable

    Reads as off-white

  • Tritanopia

    No working blue (short-wavelength) cones

    #E9FDFB ΔE2000 2.8

    Close match

    Reads as pale grayish cyan

  • Achromatopsia

    No cone color vision; lightness only

    #F9F9F9 ΔE2000 8.6

    Noticeable

    Reads as off-white

Pairing check

A near-neutral has no complementary hue to pair with, so tell it apart from neighboring grays by lightness contrast alone.

Harmony

Color harmonies for #ECFDF5

Its complement is #FFF5FA, an off-white.

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

Open the Harmony Studio
  • Base#ECFDF5
  • Complement#FFF5FA

Complementary

Open in Harmony Studio
  • −30°#F2FCEE
  • Base#ECFDF5
  • +30°#E9FDFD

Analogous

Open in Harmony Studio
  • Base#ECFDF5
  • +120°#F7F7FF
  • +240°#FFF6F2

Triadic

Open in Harmony Studio
  • Base#ECFDF5
  • +150°#FCF5FF
  • +210°#FFF6F6

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-50: #ecfdf5;
}

Tailwind config

// tailwind.config.js — already built in as emerald-50;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        emerald: { 50: '#ecfdf5' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own emerald-50; this pins the v3 value. */
  --color-emerald-50: oklch(0.979 0.021 166.1);
}

Design token (W3C DTCG)

{
  "color": {
    "emerald-50": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.9255, 0.9922, 0.9608],
        "hex": "#ecfdf5"
      },
      "$description": "Tailwind CSS v3 emerald-50"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let emerald50 = Color(.sRGB, red: 0.925, green: 0.992, blue: 0.961, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Emerald50 = Color(0xFFECFDF5)
}

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 #ECFDF5 in the tools

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