CSS named color · RAL Classic color

White #FFFFFF

The CSS keyword white is #FFFFFF. It is also the usual sRGB approximation of RAL 9010 Pure white. It is pure white in the neutral family. In OKLCH it sits at lightness 1.000 with chroma 0.000, too low for hue to matter.

Relative luminance
1.0000
OKLCH L · C · h
1.000 · 0.000 · —
Best text
Black 21.00:1
Hue family
Neutral
Inspect this color Check contrast

#FFFFFF color codes

HEX
#FFFFFF
RGB
rgb(255, 255, 255)
HSL
hsl(0, 0%, 100%)
OKLCH
oklch(1.000 0.000 0)
OKLab
oklab(1.000 0.000 0.000)
CIELAB (D65)
L* 100.00, a* 0.00, b* 0.00
XYZ (D65)
X 95.05, Y 100.00, Z 108.88
CMYK (naive)
cmyk(0%, 0%, 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.

RAL and RAL Classic are trademarks of RAL gGmbH, which this site is not affiliated with. The sRGB value is an approximation of the printed swatch; check a physical RAL color card before you specify a paint.

Legibility

Contrast: is #FFFFFF accessible?

Black text on it reaches 21.00:1, passing AAA. White text fails at 1.00:1.

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

    21.00:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +106

  • White text on it

    1.00:1

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

    Text is here, unreadable at 1.00:1

  • As text on black

    21.00:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −107

  • As text on white

    1.00:1

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

    Text is here, unreadable at 1.00:1

Nearest versions that pass 4.5:1

  • For text on white

    No lightness at this hue reaches 4.5:1 on white.

  • For text on black

    #FFFFFF 21.00:1

    It already reaches 21.00:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #FFFFFF 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 #FFFFFF

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

  1. 50This color#FFFFFF
    White
    1.00
    Black
    21.00
  2. 100#EBEBEB
    White
    1.19
    Black
    17.61
  3. 200#D7D7D7
    White
    1.43
    Black
    14.59
  4. 300#BEBEBE
    White
    1.85
    Black
    11.29
  5. 400#A1A1A1
    White
    2.58
    Black
    8.12
  6. 500#868686
    White
    3.64
    Black
    5.76
  7. 600#6F6F6F
    White
    5.02
    Black
    4.17
  8. 700#585858
    White
    7.11
    Black
    2.95
  9. 800#404040
    White
    10.36
    Black
    2.02
  10. 900#292929
    White
    14.54
    Black
    1.44
  11. 950#161616
    White
    18.09
    Black
    1.16

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

Gamut

How vivid #FFFFFF can get

A gray has no hue, so no gamut holds a more vivid version of #FFFFFF: 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
0.000
sRGB edge
No hue
Display P3 edge
No hue
Rec. 2020 edge
No hue
Dominant wavelength
None, near white
Excitation purity
0%
Chromaticity
x 0.3127, y 0.3290

Mixing

Mixing #FFFFFF

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%#FFFFFF
  • OKLab50%#FFFFFF
  • OKLCH50%#FFFFFF

Black #000000

  • sRGB50%#808080
  • OKLab50%#636363
  • OKLCH50%#636363
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #ffffff, white);
color: color-mix(in oklch, #ffffff 50%, white);

In use

#FFFFFF 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, 4.5:121.00:1 Passes
  • Link and body-size textText, 4.5:11.00:1 Fails
  • Large headingLarge text, 3:11.00:1 Fails
  • Icons, borders and focus ringsNon-text, 3:11.00:1 Fails

Dark page

  • Button labelText, 4.5:121.00:1 Passes
  • Link and body-size textText, 4.5:118.73:1 Passes
  • Large headingLarge text, 3:118.73:1 Passes
  • Icons, borders and focus ringsNon-text, 3:118.73:1 Passes

Color vision

How #FFFFFF looks with color blindness

As a neutral it barely changes under any simulation, ΔE2000 0.0 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

    #FFFFFF ΔE2000 0.0

    Imperceptible

    Reads as white

  • Deuteranopia

    No working green (medium-wavelength) cones

    #FFFFFF ΔE2000 0.0

    Imperceptible

    Reads as white

  • Tritanopia

    No working blue (short-wavelength) cones

    #FFFFFF ΔE2000 0.0

    Imperceptible

    Reads as white

  • Achromatopsia

    No cone color vision; lightness only

    #FFFFFF ΔE2000 0.0

    Imperceptible

    Reads as 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 #FFFFFF

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 #161616 · 18.09:1

    Body text, AAA

  • Step 700 #585858 · 7.11:1

    Body text, AAA

  • Step 300 #BEBEBE · 1.85:1

    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-white: #ffffff;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        white: '#ffffff',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-white: oklch(1.000 0.000 0);
}

Design token (W3C DTCG)

{
  "color": {
    "white": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [1, 1, 1],
        "hex": "#ffffff"
      },
      "$description": "CSS named color white"
    }
  }
}

SwiftUI color

import SwiftUI

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

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val White = Color(0xFFFFFFFF)
}

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 #FFFFFF in the tools

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