Tailwind CSS v3 color

Tailwind yellow-100 #FEF9C3

Tailwind CSS v3's yellow-100 is #FEF9C3. It is a pale muted yellow in the yellow family. In OKLCH it sits at lightness 0.973, chroma 0.069 and hue 103.2°. The nearest CSS named color is lemonchiffon (#FFFACD), ΔE2000 2.2 away.

Relative luminance
0.9276
OKLCH L · C · h
0.973 · 0.069 · 103.2
Best text
Black 19.55:1
Hue family
Yellow
Inspect this color Check contrast

#FEF9C3 color codes

HEX
#FEF9C3
RGB
rgb(254, 249, 195)
HSL
hsl(55, 97%, 88%)
OKLCH
oklch(0.973 0.069 103.2)
OKLab
oklab(0.973 -0.016 0.068)
CIELAB (D65)
L* 97.13, a* -6.67, b* 26.59
XYZ (D65)
X 84.60, Y 92.76, Z 65.07
CMYK (naive)
cmyk(0%, 2%, 23%, 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 #FEF9C3 accessible?

Black text on it reaches 19.55:1, passing AAA. White text fails at 1.07:1.

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

    19.55:1

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

  • White text on it

    1.07:1

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

    Text is here, unreadable at 1.07:1

  • As text on black

    19.55:1

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

  • As text on white

    1.07:1

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

    Text is here, unreadable at 1.07:1

Nearest versions that pass 4.5:1

  • For text on white

    #7C7746 4.58:1

    Darkening its OKLCH lightness from 0.97 to 0.56 reaches 4.58:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #FEF9C3 19.55:1

    It already reaches 19.55:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #FEF9C3 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 #FEF9C3

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #FEF9C3 sits at step 50.

  1. 50This color#FEF9C3
    White
    1.07
    Black
    19.55
  2. 100#F2EEC2
    White
    1.18
    Black
    17.78
  3. 200#DEDAAC
    White
    1.42
    Black
    14.73
  4. 300#C5C090
    White
    1.85
    Black
    11.31
  5. 400#A9A472
    White
    2.54
    Black
    8.24
  6. 500#8D8856
    White
    3.62
    Black
    5.78
  7. 600#767140
    White
    4.99
    Black
    4.20
  8. 700#5F5A2A
    White
    7.04
    Black
    2.98
  9. 800#464114
    White
    10.36
    Black
    2.02
  10. 900#2E2A00
    White
    14.50
    Black
    1.44
  11. 950#1A1700
    White
    18.00
    Black
    1.16

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

Tailwind CSS v3 yellow scale

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

  1. 50#FEFCE8
    White
    1.03
    Black
    20.30
  2. 100This color#FEF9C3
    White
    1.07
    Black
    19.55
  3. 200#FEF08A
    White
    1.16
    Black
    18.04
  4. 300#FDE047
    White
    1.31
    Black
    15.92
  5. 400#FACC15
    White
    1.53
    Black
    13.71
  6. 500#EAB308
    White
    1.91
    Black
    10.95
  7. 600#CA8A04
    White
    2.93
    Black
    7.14
  8. 700#A16207
    White
    4.92
    Black
    4.26
  9. 800#854D0E
    White
    6.85
    Black
    3.06
  10. 900#713F12
    White
    8.67
    Black
    2.42
  11. 950#422006
    White
    14.57
    Black
    1.44

Gamut

How vivid #FEF9C3 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.078; #FEF9C3 uses 89% of it. Display P3, which many recent phones and laptops show, reaches 0.087 there: 12% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.069
sRGB edge
0.078
Display P3 edge
0.087
Rec. 2020 edge
0.141
Dominant wavelength
572 nm
Excitation purity
25%
Chromaticity
x 0.3490, y 0.3826
  • This color#FEF9C3
  • Most vivid in sRGB#FFF9BD
  • Most vivid in Display P3oklch(0.973 0.087 103.2)

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

Use the wider color where screens show it
.accent {
  color: #fef9c3;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 1 0.9793 0.74); }
}

Mixing

Mixing #FEF9C3

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%#FFFCE1
  • OKLab50%#FEFCE2
  • OKLCH50%#FEFCE2

Black #000000

  • sRGB50%#7F7D62
  • OKLab50%#63614A
  • OKLCH50%#63614A

Its complement #F5F5FF

  • sRGB50%#FAF7E1
  • OKLab50%#F9F7E2
  • OKLCH50%#FFF3F3
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #fef9c3, white);
color: color-mix(in oklch, #fef9c3 50%, white);

In use

#FEF9C3 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, 4.5:119.55:1 Passes
  • Link and body-size textText, 4.5:11.07:1 Fails
  • Large headingLarge text, 3:11.07:1 Fails
  • Icons, borders and focus ringsNon-text, 3:11.07:1 Fails

For text on this page, the nearest shade that passes is #7C7746 4.58:1

Dark page

  • Button labelText, 4.5:119.55:1 Passes
  • Link and body-size textText, 4.5:117.44:1 Passes
  • Large headingLarge text, 3:117.44:1 Passes
  • Icons, borders and focus ringsNon-text, 3:117.44:1 Passes

Color vision

How #FEF9C3 looks with color blindness

Achromatopsia changes it most, ΔE2000 17.3; deuteranopia changes it least, 1.0.

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

    #FFF5C0 ΔE2000 1.7

    Very close

    Reads as pale muted amber

  • Deuteranopia

    No working green (medium-wavelength) cones

    #FFF8C5 ΔE2000 1.0

    Imperceptible

    Reads as pale muted yellow

  • Tritanopia

    No working blue (short-wavelength) cones

    #FFF2EA ΔE2000 16.5

    Distinct

    Reads as off-white

  • Achromatopsia

    No cone color vision; lightness only

    #F7F7F7 ΔE2000 17.3

    Distinct

    Reads as off-white

Pairing check

Checked against its complement, #F5F5FF. Their lightness contrast is only 1.00:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#FEF9C3 · #F5F5FF23.9Stays distinct
Protanopia#FFF5C0 · #F3F6FF22.8Stays distinct
Deuteranopia#FFF8C5 · #F3F5FF22.8Stays distinct
Tritanopia#FFF2EA · #F3F7F88.0Harder to tell apart
Achromatopsia#F7F7F7 · #F6F6F60.2Easily confused

Harmony

Color harmonies for #FEF9C3

Its complement is #F5F5FF, an off-white.

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

Open the Harmony Studio
  • Base#FEF9C3
  • Complement#F5F5FF

Complementary

Open in Harmony Studio
  • −30°#FFF4E7
  • Base#FEF9C3
  • +30°#E7FFD9

Analogous

Open in Harmony Studio
  • Base#FEF9C3
  • +120°#EAF9FF
  • +240°#FFF2F9

Triadic

Open in Harmony Studio
  • Base#FEF9C3
  • +150°#F0F7FF
  • +210°#FAF3FF

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-yellow-100: #fef9c3;
}

Tailwind config

// tailwind.config.js — already built in as yellow-100;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        yellow: { 100: '#fef9c3' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own yellow-100; this pins the v3 value. */
  --color-yellow-100: oklch(0.973 0.069 103.2);
}

Design token (W3C DTCG)

{
  "color": {
    "yellow-100": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.9961, 0.9765, 0.7647],
        "hex": "#fef9c3"
      },
      "$description": "Tailwind CSS v3 yellow-100"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let yellow100 = Color(.sRGB, red: 0.996, green: 0.976, blue: 0.765, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Yellow100 = Color(0xFFFEF9C3)
}

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 #FEF9C3 in the tools

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