Tailwind CSS v3 color

Tailwind blue-50 #EFF6FF

Tailwind CSS v3's blue-50 is #EFF6FF. It is an off-white in the neutral family. In OKLCH it sits at lightness 0.970 with chroma 0.014, too low for hue to matter. The nearest CSS named color is aliceblue (#F0F8FF), ΔE2000 1.3 away.

Relative luminance
0.9148
OKLCH L · C · h
0.970 · 0.014 · 254.6
Best text
Black 19.29:1
Hue family
Neutral
Inspect this color Check contrast

#EFF6FF color codes

HEX
#EFF6FF
RGB
rgb(239, 246, 255)
HSL
hsl(214, 100%, 97%)
OKLCH
oklch(0.970 0.014 254.6)
OKLab
oklab(0.970 -0.004 -0.014)
CIELAB (D65)
L* 96.61, a* -0.66, b* -5.11
XYZ (D65)
X 86.60, Y 91.48, Z 107.68
CMYK (naive)
cmyk(6%, 4%, 0%, 0%)

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 #EFF6FF accessible?

Black text on it reaches 19.29:1, passing AAA. White text fails at 1.08:1.

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

    19.29:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +100

  • White text on it

    1.08:1

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

    Text is here, unreadable at 1.08:1

  • As text on black

    19.29:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −101

  • As text on white

    1.08:1

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

    Text is here, unreadable at 1.08:1

Nearest versions that pass 4.5:1

  • For text on white

    #71777E 4.52:1

    Darkening its OKLCH lightness from 0.97 to 0.57 reaches 4.52:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #EFF6FF 19.29:1

    It already reaches 19.29:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #EFF6FF 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 #EFF6FF

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #EFF6FF sits at step 50.

  1. 50This color#EFF6FF
    White
    1.08
    Black
    19.29
  2. 100#E6ECF3
    White
    1.18
    Black
    17.65
  3. 200#D2D8E0
    White
    1.43
    Black
    14.63
  4. 300#B8BEC6
    White
    1.87
    Black
    11.21
  5. 400#9CA2AA
    White
    2.57
    Black
    8.16
  6. 500#80878F
    White
    3.63
    Black
    5.78
  7. 600#696F77
    White
    5.07
    Black
    4.14
  8. 700#535960
    White
    7.08
    Black
    2.96
  9. 800#3B4047
    White
    10.44
    Black
    2.01
  10. 900#25292F
    White
    14.61
    Black
    1.43
  11. 950#13161B
    White
    18.13
    Black
    1.15

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

Tailwind CSS v3 blue scale

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

  1. 50This color#EFF6FF
    White
    1.08
    Black
    19.29
  2. 100#DBEAFE
    White
    1.22
    Black
    17.21
  3. 200#BFDBFE
    White
    1.42
    Black
    14.77
  4. 300#93C5FD
    White
    1.80
    Black
    11.64
  5. 400#60A5FA
    White
    2.54
    Black
    8.25
  6. 500#3B82F6
    White
    3.67
    Black
    5.70
  7. 600#2563EB
    White
    5.16
    Black
    4.06
  8. 700#1D4ED8
    White
    6.70
    Black
    3.13
  9. 800#1E40AF
    White
    8.72
    Black
    2.40
  10. 900#1E3A8A
    White
    10.35
    Black
    2.02
  11. 950#172554
    White
    14.69
    Black
    1.42

Gamut

How vivid #EFF6FF can get

A gray has no hue, so no gamut holds a more vivid version of #EFF6FF: more chroma would make it another color.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.014
sRGB edge
No hue
Display P3 edge
No hue
Rec. 2020 edge
No hue
Dominant wavelength
479 nm
Excitation purity
4%
Chromaticity
x 0.3030, y 0.3201

Mixing

Mixing #EFF6FF

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%#F7FBFF
  • OKLab50%#F7FBFF
  • OKLCH50%#F7FBFF

Black #000000

  • sRGB50%#787B80
  • OKLab50%#5C5F63
  • OKLCH50%#5C5F63
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #eff6ff, white);
color: color-mix(in oklch, #eff6ff 50%, white);

In use

#EFF6FF 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, 4.5:119.29:1 Passes
  • Link and body-size textText, 4.5:11.08:1 Fails
  • Large headingLarge text, 3:11.08:1 Fails
  • Icons, borders and focus ringsNon-text, 3:11.08:1 Fails

For text on this page, the nearest shade that passes is #71777E 4.52:1

Dark page

  • Button labelText, 4.5:119.29:1 Passes
  • Link and body-size textText, 4.5:117.21:1 Passes
  • Large headingLarge text, 3:117.21:1 Passes
  • Icons, borders and focus ringsNon-text, 3:117.21:1 Passes

Color vision

How #EFF6FF looks with color blindness

As a neutral it barely changes under any simulation, ΔE2000 5.3 at most.

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

    #F3F6FF ΔE2000 1.9

    Very close

    Reads as off-white

  • Deuteranopia

    No working green (medium-wavelength) cones

    #F1F5FF ΔE2000 1.6

    Very close

    Reads as off-white

  • Tritanopia

    No working blue (short-wavelength) cones

    #EBF8F9 ΔE2000 5.3

    Noticeable

    Reads as off-white

  • Achromatopsia

    No cone color vision; lightness only

    #F5F5F5 ΔE2000 4.7

    Close match

    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 #EFF6FF

A neutral has no hue to rotate, so every harmony collapses back to the same gray. Pair it with an accent color instead.

Or pair it by lightness: steps of its own scale as text on it, and what each can carry.

Build a lightness scale in Harmony Studio

  • Step 950 #13161B · 16.65:1

    Body text, AAA

  • Step 700 #535960 · 6.50:1

    Body text, AA

  • Step 300 #B8BEC6 · 1.71:1

    Decoration only, under 3:1

Code

Design tokens

Ready-to-paste tokens in six formats. Rename them to fit your system.

CSS custom property

:root {
  --color-blue-50: #eff6ff;
}

Tailwind config

// tailwind.config.js — already built in as blue-50;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        blue: { 50: '#eff6ff' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own blue-50; this pins the v3 value. */
  --color-blue-50: oklch(0.970 0.014 254.6);
}

Design token (W3C DTCG)

{
  "color": {
    "blue-50": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.9373, 0.9647, 1],
        "hex": "#eff6ff"
      },
      "$description": "Tailwind CSS v3 blue-50"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let blue50 = Color(.sRGB, red: 0.937, green: 0.965, blue: 1.000, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Blue50 = Color(0xFFEFF6FF)
}

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 #EFF6FF in the tools

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