CSS named color

Sienna #A0522D

The CSS keyword sienna is #A0522D. It is a soft brown in the brown family. In OKLCH it sits at lightness 0.526, chroma 0.115 and hue 44.6°.

Relative luminance: 0.1370
OKLCH L · C · h: 0.526 · 0.115 · 44.6
Best text: White 5.61:1
Hue family: Brown

Inspect this color Check contrast

#A0522D color codes

HEX: #A0522D
RGB: rgb(160, 82, 45)
HSL: hsl(19, 56%, 40%)
OKLCH: oklch(0.526 0.115 44.6)
OKLab: oklab(0.526 0.082 0.081)
CIELAB (D65): L* 43.80, a* 29.32, b* 35.64
XYZ (D65): X 17.99, Y 13.70, Z 4.18
CMYK (naive): cmyk(0%, 49%, 72%, 37%)

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 #A0522D accessible?

White text on it reaches 5.61:1, passing AA. Black text manages only 3.73:1, enough for large text only.

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

3.73:1
- AA fails
- AA large passes
- AAA fails
- APCA Lc +26
White text on it

5.61:1
- AA passes
- AA large passes
- AAA fails
- APCA Lc −82
As text on black

3.73:1
- AA fails
- AA large passes
- AAA fails
- APCA Lc −24
As text on white

5.61:1
- AA passes
- AA large passes
- AAA fails
- APCA Lc +77

Nearest versions that pass 4.5:1

For text on white

#A0522D 5.61:1

It already reaches 5.61:1 on white, so no change is needed.
For text on black

#AF5F3A 4.52:1

Lightening its OKLCH lightness from 0.53 to 0.57 reaches 4.52:1 on black, keeping the hue.

Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #A0522D 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 #A0522D

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #A0522D sits at step 600.

50#FFF2ED

White
1.09
Black
19.17
100#FFE5DA

White
1.20
Black
17.47
200#FFCAB3

White
1.46
Black
14.35
300#F8A783

White
1.93
Black
10.84
400#DC8A65

White
2.66
Black
7.86
500#BF6E49

White
3.78
Black
5.54
600This color#A0522D

White
5.61
Black
3.73
700#89401B

White
7.46
Black
2.81
800#6B2801

White
10.88
Black
1.92
900#481800

White
14.93
Black
1.40
950#2A0B00

White
18.31
Black
1.14

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

Gamut

How vivid #A0522D can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.152; #A0522D uses 76% of it. Display P3, which many recent phones and laptops show, reaches 0.172 there: 13% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.115
sRGB edge: 0.152
Display P3 edge: 0.172
Rec. 2020 edge: 0.173
Dominant wavelength: 593 nm
Excitation purity: 68%
Chromaticity: x 0.5015, y 0.3819

This color#A0522D
Most vivid in sRGB#AE4600
Most vivid in Display P3oklch(0.526 0.172 44.6)

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

Use the wider color where screens show it

.accent {
  color: #a0522d;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.66 0.2727 0); }
}

Mixing

Mixing #A0522D

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%#D0A996
OKLab50%#D2A794
OKLCH50%#D2A794

Black #000000

sRGB50%#502917
OKLab50%#3B1A0B
OKLCH50%#3B1A0B

Its complement #007695

sRGB50%#506461
OKLab50%#6F6967
OKLCH50%#4F7835

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #a0522d, white);
color: color-mix(in oklch, #a0522d 50%, white);

In use

#A0522D 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, 4.5:15.61:1 Passes
Link and body-size textText, 4.5:15.61:1 Passes
Large headingLarge text, 3:15.61:1 Passes
Icons, borders and focus ringsNon-text, 3:15.61:1 Passes

Dark page

Button labelText, 4.5:15.61:1 Passes
Link and body-size textText, 4.5:13.33:1 Fails
Large headingLarge text, 3:13.33:1 Passes
Icons, borders and focus ringsNon-text, 3:13.33:1 Passes

For text on this page, the nearest shade that passes is #B96843 4.57:1

Color vision

How #A0522D looks with color blindness

Deuteranopia changes it most, ΔE2000 24.1; tritanopia changes it least, 15.0.

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

#675D29 ΔE2000 23.2

Distinct

Reads as dark muted brown
Deuteranopia

No working green (medium-wavelength) cones

#7A6E2C ΔE2000 24.1

Distinct

Reads as muted brown
Tritanopia

No working blue (short-wavelength) cones

#AF424A ΔE2000 15.0

Distinct

Reads as soft red
Achromatopsia

No cone color vision; lightness only

#676767 ΔE2000 23.5

Distinct

Reads as gray

Pairing check

Checked against its complement, #007695. Their lightness contrast is only 1.07:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#A0522D · #007695	45.9	Stays distinct
Protanopia	#675D29 · #657397	36.8	Stays distinct
Deuteranopia	#7A6E2C · #536795	41.5	Stays distinct
Tritanopia	#AF424A · #007F80	51.0	Stays distinct
Achromatopsia	#676767 · #6C6C6C	1.9	Easily confused

Harmony

Color harmonies for #A0522D

Its complement is #007695, a muted blue, on the cool 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#A0522D
Complement#007695

Complementary

Open in Harmony Studio

−30°#A24B56
Base#A0522D
+30°#905F00

Analogous

Open in Harmony Studio

Base#A0522D
+120°#007E5A
+240°#6460AA

Triadic

Open in Harmony Studio

Base#A0522D
+150°#007B7A
+210°#386CAC

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-sienna: #a0522d;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        sienna: '#a0522d',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-sienna: oklch(0.526 0.115 44.6);
}

Design token (W3C DTCG)

{
  "color": {
    "sienna": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.6275, 0.3216, 0.1765],
        "hex": "#a0522d"
      },
      "$description": "CSS named color sienna"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let sienna = Color(.sRGB, red: 0.627, green: 0.322, blue: 0.176, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Sienna = Color(0xFFA0522D)
}

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 #A0522D in the tools

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

Sienna #A0522D

#A0522D color codes

Contrast: is #A0522D 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 #A0522D live

Shades and tints of #A0522D

How vivid #A0522D can get

Mixing #A0522D

#A0522D in an interface

How #A0522D looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #A0522D

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 #A0522D in the tools