CSS named color

Light Sky Blue #87CEFA

The CSS keyword lightskyblue is #87CEFA. It is a pale muted blue in the blue family. In OKLCH it sits at lightness 0.821, chroma 0.095 and hue 236.8°.

Relative luminance: 0.5620
OKLCH L · C · h: 0.821 · 0.095 · 236.8
Best text: Black 12.23:1
Hue family: Blue

Inspect this color Check contrast

#87CEFA color codes

HEX: #87CEFA
RGB: rgb(135, 206, 250)
HSL: hsl(203, 92%, 75%)
OKLCH: oklch(0.821 0.095 236.8)
OKLab: oklab(0.821 -0.052 -0.079)
CIELAB (D65): L* 79.72, a* -10.83, b* -28.50
XYZ (D65): X 49.31, Y 56.19, Z 98.67
CMYK (naive): cmyk(46%, 18%, 0%, 2%)

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 #87CEFA accessible?

Black text on it reaches 12.23:1, passing AAA. White text fails at 1.71:1.

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

12.23:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +73
White text on it

1.71:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc −34
As text on black

12.23:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −72
As text on white

1.71:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc +30

Nearest versions that pass 4.5:1

For text on white

#357CA5 4.58:1

Darkening its OKLCH lightness from 0.82 to 0.56 reaches 4.58:1 on white, keeping the hue.

Compare both in the Contrast System
For text on black

#87CEFA 12.23:1

It already reaches 12.23:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #87CEFA 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 #87CEFA

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #87CEFA sits at step 300.

50#EBF7FF

White
1.08
Black
19.28
100#D7EFFF

White
1.18
Black
17.68
200#ADDFFF

White
1.42
Black
14.77
300This color#87CEFA

White
1.71
Black
12.23
400#66AAD4

White
2.54
Black
8.26
500#488EB8

White
3.59
Black
5.83
600#2F769E

White
4.99
Black
4.20
700#145F84

White
7.00
Black
2.99
800#004565

White
10.29
Black
2.03
900#002D43

White
14.41
Black
1.45
950#001927

White
17.97
Black
1.16

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

Gamut

How vivid #87CEFA can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.104; #87CEFA uses 91% of it. Display P3, which many recent phones and laptops show, reaches 0.113 there: 9% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.095
sRGB edge: 0.104
Display P3 edge: 0.113
Rec. 2020 edge: 0.114
Dominant wavelength: 482 nm
Excitation purity: 31%
Chromaticity: x 0.2415, y 0.2752

This color#87CEFA
Most vivid in sRGB#80CFFF
Most vivid in Display P3oklch(0.821 0.113 236.8)

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

Use the wider color where screens show it

.accent {
  color: #87cefa;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.5519 0.8047 1); }
}

Mixing

Mixing #87CEFA

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%#C3E7FD
OKLab50%#C5E7FD
OKLCH50%#C5E7FD

Black #000000

sRGB50%#44677D
OKLab50%#314E61
OKLCH50%#314E61

Its complement #F4B588

sRGB50%#BEC2C1
OKLab50%#C4C4C4
OKLCH50%#E5AFE5

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #87cefa, white);
color: color-mix(in oklch, #87cefa 50%, white);

In use

#87CEFA 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, 4.5:112.23:1 Passes
Link and body-size textText, 4.5:11.71:1 Fails
Large headingLarge text, 3:11.71:1 Fails
Icons, borders and focus ringsNon-text, 3:11.71:1 Fails

For text on this page, the nearest shade that passes is #357CA5 4.58:1

Dark page

Button labelText, 4.5:112.23:1 Passes
Link and body-size textText, 4.5:110.91:1 Passes
Large headingLarge text, 3:110.91:1 Passes
Icons, borders and focus ringsNon-text, 3:110.91:1 Passes

Color vision

How #87CEFA looks with color blindness

Achromatopsia changes it most, ΔE2000 18.7; deuteranopia changes it least, 12.1.

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

#BACDFC ΔE2000 12.7

Distinct

Reads as pale muted blue
Deuteranopia

No working green (medium-wavelength) cones

#AAC0F9 ΔE2000 12.1

Distinct

Reads as light muted blue
Tritanopia

No working blue (short-wavelength) cones

#53D9DC ΔE2000 16.6

Distinct

Reads as light soft cyan
Achromatopsia

No cone color vision; lightness only

#C6C6C6 ΔE2000 18.7

Distinct

Reads as light gray

Pairing check

Checked against its complement, #F4B588. Their lightness contrast is only 1.03:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#87CEFA · #F4B588	39.7	Stays distinct
Protanopia	#BACDFC · #C7BA85	37.0	Stays distinct
Deuteranopia	#AAC0F9 · #D6C888	41.6	Stays distinct
Tritanopia	#53D9DC · #FFA9A9	48.7	Stays distinct
Achromatopsia	#C6C6C6 · #C2C2C2	1.0	Easily confused

Harmony

Color harmonies for #87CEFA

Its complement is #F4B588, a pale muted orange, on the warm side of the wheel.

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

Open the Harmony Studio

Base#87CEFA
Complement#F4B588

Complementary

Open in Harmony Studio

−30°#73D6E3
Base#87CEFA
+30°#AAC3FF

Analogous

Open in Harmony Studio

Base#87CEFA
+120°#F7ABC5
+240°#C0CD85

Triadic

Open in Harmony Studio

Base#87CEFA
+150°#FCADA4
+210°#DFC17B

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-lightskyblue: #87cefa;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        lightskyblue: '#87cefa',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-lightskyblue: oklch(0.821 0.095 236.8);
}

Design token (W3C DTCG)

{
  "color": {
    "lightskyblue": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.5294, 0.8078, 0.9804],
        "hex": "#87cefa"
      },
      "$description": "CSS named color lightskyblue"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let lightskyblue = Color(.sRGB, red: 0.529, green: 0.808, blue: 0.980, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Lightskyblue = Color(0xFF87CEFA)
}

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.

Tools

Open #87CEFA in the tools

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

Light Sky Blue #87CEFA

#87CEFA color codes

Contrast: is #87CEFA accessible?

Black text on it

White text on it

As text on black

As text on white

Nearest versions that pass 4.5:1

Adjust #87CEFA live

Shades and tints of #87CEFA

How vivid #87CEFA can get

Mixing #87CEFA

#87CEFA in an interface

How #87CEFA looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #87CEFA

Complementary

Analogous

Triadic

Split-complementary

Design tokens

CSS custom property

Tailwind config

Tailwind v4 theme

Design token (W3C DTCG)

SwiftUI color

Jetpack Compose color

The nearest match in each system

Similar colors

Open #87CEFA in the tools