CSS named color

Alice Blue #F0F8FF

The CSS keyword aliceblue is #F0F8FF. It is an off-white in the neutral family. In OKLCH it sits at lightness 0.975 with chroma 0.013, too low for hue to matter.

Relative luminance
0.9288
OKLCH L · C · h
0.975 · 0.013 · 244.3
Best text
Black 19.57:1
Hue family
Neutral
Inspect this color Check contrast

#F0F8FF color codes

HEX
#F0F8FF
RGB
rgb(240, 248, 255)
HSL
hsl(208, 100%, 97%)
OKLCH
oklch(0.975 0.013 244.3)
OKLab
oklab(0.975 -0.006 -0.011)
CIELAB (D65)
L* 97.18, a* -1.35, b* -4.26
XYZ (D65)
X 87.55, Y 92.88, Z 107.90
CMYK (naive)
cmyk(6%, 3%, 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 #F0F8FF accessible?

Black text on it reaches 19.57:1, 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

    19.57:1

    • 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

    19.57:1

    • 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

    #70777D 4.54:1

    Darkening its OKLCH lightness from 0.98 to 0.57 reaches 4.54:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #F0F8FF 19.57:1

    It already reaches 19.57:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #F0F8FF 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 #F0F8FF

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #F0F8FF sits at step 50.

  1. 50This color#F0F8FF
    White
    1.07
    Black
    19.57
  2. 100#E6ECF2
    White
    1.19
    Black
    17.64
  3. 200#D2D8DE
    White
    1.43
    Black
    14.61
  4. 300#B8BFC5
    White
    1.85
    Black
    11.29
  5. 400#9BA3A9
    White
    2.55
    Black
    8.20
  6. 500#80878D
    White
    3.64
    Black
    5.76
  7. 600#697076
    White
    5.02
    Black
    4.17
  8. 700#52595F
    White
    7.11
    Black
    2.95
  9. 800#3B4146
    White
    10.34
    Black
    2.03
  10. 900#252A2E
    White
    14.48
    Black
    1.44
  11. 950#12171A
    White
    18.05
    Black
    1.16

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

Gamut

How vivid #F0F8FF can get

A gray has no hue, so no gamut holds a more vivid version of #F0F8FF: 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
0.013
sRGB edge
No hue
Display P3 edge
No hue
Rec. 2020 edge
No hue
Dominant wavelength
482 nm
Excitation purity
4%
Chromaticity
x 0.3036, y 0.3221

Mixing

Mixing #F0F8FF

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%#F8FCFF
  • OKLab50%#F8FCFF
  • OKLCH50%#F8FCFF

Black #000000

  • sRGB50%#787C80
  • OKLab50%#5D6063
  • OKLCH50%#5D6063
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #f0f8ff, white);
color: color-mix(in oklch, #f0f8ff 50%, white);

In use

#F0F8FF 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, 4.5:119.57:1 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 #70777D 4.54:1

Dark page

  • Button labelText, 4.5:119.57:1 Passes
  • Link and body-size textText, 4.5:117.46:1 Passes
  • Large headingLarge text, 3:117.46:1 Passes
  • Icons, borders and focus ringsNon-text, 3:117.46:1 Passes

Color vision

How #F0F8FF looks with color blindness

As a neutral it barely changes under any simulation, ΔE2000 4.6 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

    #F5F8FF ΔE2000 2.3

    Close match

    Reads as off-white

  • Deuteranopia

    No working green (medium-wavelength) cones

    #F3F6FF ΔE2000 2.8

    Close match

    Reads as off-white

  • Tritanopia

    No working blue (short-wavelength) cones

    #EDFAFA ΔE2000 4.6

    Close match

    Reads as off-white

  • Achromatopsia

    No cone color vision; lightness only

    #F7F7F7 ΔE2000 4.3

    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 #F0F8FF

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 #12171A · 16.82:1

    Body text, AAA

  • Step 700 #52595F · 6.62:1

    Body text, AA

  • Step 300 #B8BFC5 · 1.73:1

    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-aliceblue: #f0f8ff;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        aliceblue: '#f0f8ff',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-aliceblue: oklch(0.975 0.013 244.3);
}

Design token (W3C DTCG)

{
  "color": {
    "aliceblue": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.9412, 0.9725, 1],
        "hex": "#f0f8ff"
      },
      "$description": "CSS named color aliceblue"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let aliceblue = Color(.sRGB, red: 0.941, green: 0.973, blue: 1.000, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Aliceblue = Color(0xFFF0F8FF)
}

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 #F0F8FF in the tools

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