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CSS Named Colors

Sienna

sienna · #A0522D

HEX

#A0522D

RGB

rgb(160, 82, 45)

CMYK

cmyk(0%, 49%, 72%, 37%)

HSL

hsl(19, 56%, 40%)

LAB

lab(43.8, 29.3, 35.6)

What is Sienna?

Sienna is the sienna reference in the CSS Named Colors. Its sRGB value is #A0522D (rgb 160, 82, 45). It sits in the brown family. The 147 named colors defined by the W3C CSS Color Module Level 4 specification — usable directly in CSS as keywords like 'crimson' or 'rebeccapurple'. See disclaimer for accuracy and trademark notes.

Accessibility

WCAG 2.1 contrast checks for Sienna as a background.

Black text on this color

Sample text · 3.74 : 1
AA Normal
AA Large
AAA Normal
AAA Large

White text on this color

Sample text · 5.62 : 1
AA Normal
AA Large
AAA Normal
AAA Large

Shades, tints & tonal scale of Sienna

An 11-step tonal scale derived from Sienna (#A0522D). Click any swatch to copy its HEX. Use these as a starting point for design tokens, hover states, and disabled states in a design system.

Copied #F7F1EE

50

#F7F1EE

#F7F1EE

Copied #F0E3DD

100

#F0E3DD

#F0E3DD

Copied #E1C8BC

200

#E1C8BC

#E1C8BC

Copied #D0A996

300

#D0A996

#D0A996

Copied #B87D62

400

#B87D62

#B87D62

Copied #A0522D

500

#A0522D

#A0522D

Copied #884626

600

#884626

#884626

Copied #68351D

700

#68351D

#68351D

Copied #482514

800

#482514

#482514

Copied #28150B

900

#28150B

#28150B

Copied #130A05

950

#130A05

#130A05

Lighter tints (mixed with white)

Copied #B38273

15%

#B38273

Copied #C3A299

30%

#C3A299

Copied #D2BBB5

45%

#D2BBB5

Copied #DFD0CD

60%

#DFD0CD

Copied #ECE3E1

75%

#ECE3E1

Darker shades (mixed with black)

Copied #954C29

15%

#954C29

Copied #884525

30%

#884525

Copied #7A3D20

45%

#7A3D20

Copied #69341A

60%

#69341A

Copied #542813

75%

#542813

Color harmonies for Sienna

Classic color-theory harmonies derived from rotating the hue of Sienna. Use these to build accent palettes, brand systems, and accessible UI color pairings.

Complementary

180° opposite — strongest contrast

Copied #A0522D

#A0522D

#A0522D

Copied #2D7B9F

#2D7B9F

#2D7B9F

Triadic

Three colors 120° apart

Copied #A0522D

#A0522D

#A0522D

Copied #2D9F51

#2D9F51

#2D9F51

Copied #512D9F

#512D9F

#512D9F

Analogous

Two neighbors ±30° on the wheel

Copied #9F2D42

#9F2D42

#9F2D42

Copied #A0522D

#A0522D

#A0522D

Copied #9F8A2D

#9F8A2D

#9F8A2D

Split-complementary

Base + two colors flanking its complement

Copied #A0522D

#A0522D

#A0522D

Copied #2D9F8A

#2D9F8A

#2D9F8A

Copied #2D429F

#2D429F

#2D429F

Tetradic

Two complementary pairs

Copied #A0522D

#A0522D

#A0522D

Copied #7B9F2D

#7B9F2D

#7B9F2D

Copied #2D7B9F

#2D7B9F

#2D7B9F

Copied #512D9F

#512D9F

#512D9F

Square

Four colors evenly spaced 90° apart

Copied #A0522D

#A0522D

#A0522D

Copied #429F2D

#429F2D

#429F2D

Copied #2D7B9F

#2D7B9F

#2D7B9F

Copied #8A2D9F

#8A2D9F

#8A2D9F

Sienna in every color space

Full conversion of Sienna across the color spaces designers and developers actually use — including OKLCH (the perceptually-uniform space that powers Tailwind v4 and CSS Color Module Level 4) and HWB.

HEX

#A0522D

RGB

rgb(160, 82, 45)

CMYK

cmyk(0%, 49%, 72%, 37%)

HSL

hsl(19, 56%, 40%)

HSV

hsv(19, 72%, 63%)

HWB

hwb(19 18% 37%)

CIE Lab

lab(43.8 29.3 35.6)

OKLCH

oklch(52.6% 0.115 44.6)

XYZ (D65)

xyz(17.99, 13.70, 4.18)

Copy-ready code for Sienna

Drop-in snippets for CSS, Tailwind, Sass, iOS Swift, and Android XML. Click the copy button on any snippet to put it on your clipboard.

CSS

color: #A0522D;
background-color: #A0522D;

CSS variable

:root {
  --color-sienna: #A0522D;
}

Tailwind config

// tailwind.config.js
colors: {
  'sienna': '#A0522D',
}

Sass

$color-sienna: #A0522D;

Swift UIColor

UIColor(red: 0.627, green: 0.322, blue: 0.176, alpha: 1.0)

Android XML

<color name="sienna">#A0522D</color>

Closest match in every color system

The nearest Sienna equivalent in every other color system on this site, ranked by ΔE2000 perceptual distance. Useful when translating between design-system, web-standard, and industrial color references.

Closest in CSS Named Colors

Top 6 ΔE2000-closest entries within the same collection.

Top 6 ΔE2000-closest Pantone references. Cross-system matching is approximate — see disclaimer.

Top 6 ΔE2000-closest RAL Classic references for industrial coating cross-reference.

Copied #A65E2E

RAL 8023

#A65E2E

Orange brown

Copied #8E402A

RAL 8004

#8E402A

Copper brown

Copied #C93C20

RAL 2001

#C93C20

Red orange

Copied #955F20

RAL 8001

#955F20

Ochre brown

Copied #AF2B1E

RAL 3000

#AF2B1E

Flame red

Copied #79553D

RAL 8024

#79553D

Beige brown

FAQ about Sienna

What is the HEX code for Sienna?

Sienna (sienna) has the HEX code #A0522D. In RGB it is rgb(160, 82, 45), and in CMYK it is cmyk(0%, 49%, 72%, 37%).

What is the OKLCH value of Sienna?

Sienna converts to oklch(0.526 0.115 44.6). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.

Is Sienna accessible for body text?

Used as a background, Sienna has a contrast ratio of 3.74:1 with black text and 5.62:1 with white text. WCAG 2.1 AA requires 4.5:1 for normal text. The current recommendation is to use white text and verify in real UI context.

What is the closest Pantone to Sienna?

The closest Pantone reference to Sienna by ΔE2000 perceptual distance is Pantone 160 C (#A1561C). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.

What is the closest RAL color to Sienna?

The closest RAL Classic reference to Sienna by ΔE2000 distance is RAL 8023 (Orange brown, #A65E2E). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.

What is the complementary color of Sienna?

The complementary color (180° opposite on the HSL color wheel) of Sienna is #2D7B9F. Use it for high-contrast accents, error states, or call-to-action pairings.

Data provenance & source

CSS Named Colors (CSS Color Module Level 4)

The 147 named colors defined by the W3C CSS Color Module Level 4 specification. Origin: VGA (16) + X11 (rest) + 'rebeccapurple'. Use as a reference for web color names that all browsers natively support. Names like 'crimson' or 'rebeccapurple' work as CSS values without any framework.

Source type
derived
Confidence
high
License
W3C permissive document license
Last reviewed
2026-05-24

Workflow tags

css
web-standard
named-keyword
brown

CSS named colors are sRGB digital values defined for browsers. For print, convert to a process-appropriate color and proof against substrate.

CSS Named Colors · Sienna — #A0522D | PantoneTools