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X11 named colors

Sienna4

sienna4 · #8B4726

HEX

#8B4726

RGB

rgb(139, 71, 38)

CMYK

cmyk(0%, 49%, 73%, 45%)

HSL

hsl(20, 57%, 35%)

LAB

lab(38.1, 26.1, 32.2)

What is Sienna4?

Sienna4 is the sienna4 reference in the X11 named colors. Its sRGB value is #8B4726 (rgb 139, 71, 38). It sits in the brown family. Historical X Window System color names — the numbered 1-4 lightness variants of the classic xorg-server rgb.txt palette. See disclaimer for accuracy and trademark notes.

Accessibility

WCAG 2.1 contrast checks for Sienna4 as a background.

Black text on this color

Sample text · 3.03 : 1
AA Normal
AA Large
AAA Normal
AAA Large

White text on this color

Sample text · 6.94 : 1
AA Normal
AA Large
AAA Normal
AAA Large

Shades, tints & tonal scale of Sienna4

An 11-step tonal scale derived from Sienna4 (#8B4726). 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 #F6F0EE

50

#F6F0EE

#F6F0EE

Copied #ECE2DC

100

#ECE2DC

#ECE2DC

Copied #DAC4BA

200

#DAC4BA

#DAC4BA

Copied #C5A393

300

#C5A393

#C5A393

Copied #A8755C

400

#A8755C

#A8755C

Copied #8B4726

500

#8B4726

#8B4726

Copied #763C20

600

#763C20

#763C20

Copied #5A2E19

700

#5A2E19

#5A2E19

Copied #3F2011

800

#3F2011

#3F2011

Copied #23120A

900

#23120A

#23120A

Copied #110905

950

#110905

#110905

Lighter tints (mixed with white)

Copied #A47D71

15%

#A47D71

Copied #B89E98

30%

#B89E98

Copied #CAB9B5

45%

#CAB9B5

Copied #DACFCD

60%

#DACFCD

Copied #E9E3E1

75%

#E9E3E1

Darker shades (mixed with black)

Copied #814123

15%

#814123

Copied #763B1F

30%

#763B1F

Copied #69341B

45%

#69341B

Copied #5A2C15

60%

#5A2C15

Copied #48220F

75%

#48220F

Color harmonies for Sienna4

Classic color-theory harmonies derived from rotating the hue of Sienna4. Use these to build accent palettes, brand systems, and accessible UI color pairings.

Complementary

180° opposite — strongest contrast

Copied #8B4726

#8B4726

#8B4726

Copied #266A8C

#266A8C

#266A8C

Triadic

Three colors 120° apart

Copied #8B4726

#8B4726

#8B4726

Copied #268C48

#268C48

#268C48

Copied #48268C

#48268C

#48268C

Analogous

Two neighbors ±30° on the wheel

Copied #8C2637

#8C2637

#8C2637

Copied #8B4726

#8B4726

#8B4726

Copied #8C7B26

#8C7B26

#8C7B26

Split-complementary

Base + two colors flanking its complement

Copied #8B4726

#8B4726

#8B4726

Copied #268C7B

#268C7B

#268C7B

Copied #26378C

#26378C

#26378C

Tetradic

Two complementary pairs

Copied #8B4726

#8B4726

#8B4726

Copied #6A8C26

#6A8C26

#6A8C26

Copied #266A8C

#266A8C

#266A8C

Copied #48268C

#48268C

#48268C

Square

Four colors evenly spaced 90° apart

Copied #8B4726

#8B4726

#8B4726

Copied #378C26

#378C26

#378C26

Copied #266A8C

#266A8C

#266A8C

Copied #7B268C

#7B268C

#7B268C

Sienna4 in every color space

Full conversion of Sienna4 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

#8B4726

RGB

rgb(139, 71, 38)

CMYK

cmyk(0%, 49%, 73%, 45%)

HSL

hsl(20, 57%, 35%)

HSV

hsv(20, 73%, 55%)

HWB

hwb(20 15% 45%)

CIE Lab

lab(38.1 26.1 32.2)

OKLCH

oklch(47.6% 0.103 45.1)

XYZ (D65)

xyz(13.25, 10.14, 3.09)

Copy-ready code for Sienna4

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: #8B4726;
background-color: #8B4726;

CSS variable

:root {
  --color-sienna4: #8B4726;
}

Tailwind config

// tailwind.config.js
colors: {
  'sienna4': '#8B4726',
}

Sass

$color-sienna4: #8B4726;

Swift UIColor

UIColor(red: 0.545, green: 0.278, blue: 0.149, alpha: 1.0)

Android XML

<color name="sienna4">#8B4726</color>

Closest match in every color system

The nearest Sienna4 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 X11 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 #8E402A

RAL 8004

#8E402A

Copper brown

Copied #734222

RAL 8003

#734222

Clay brown

Copied #79553D

RAL 8024

#79553D

Beige brown

Copied #6C3B2A

RAL 8002

#6C3B2A

Signal brown

Copied #A65E2E

RAL 8023

#A65E2E

Orange brown

Copied #A12312

RAL 3013

#A12312

Tomato red

FAQ about Sienna4

What is the HEX code for Sienna4?

Sienna4 (sienna4) has the HEX code #8B4726. In RGB it is rgb(139, 71, 38), and in CMYK it is cmyk(0%, 49%, 73%, 45%).

What is the OKLCH value of Sienna4?

Sienna4 converts to oklch(0.476 0.103 45.1). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.

Is Sienna4 accessible for body text?

Used as a background, Sienna4 has a contrast ratio of 3.03:1 with black text and 6.94:1 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 Sienna4?

The closest Pantone reference to Sienna4 by ΔE2000 perceptual distance is Pantone 730 C (#80461B). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.

What is the closest RAL color to Sienna4?

The closest RAL Classic reference to Sienna4 by ΔE2000 distance is RAL 8004 (Copper brown, #8E402A). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.

What is the complementary color of Sienna4?

The complementary color (180° opposite on the HSL color wheel) of Sienna4 is #266A8C. Use it for high-contrast accents, error states, or call-to-action pairings.

Data provenance & source

X11 named colors (xorg rgb.txt)

The historical X11 color name list shipped in the xorg-server rgb.txt file. Roughly 550 entries covering classic computing color names like 'PapayaWhip', 'MediumAquamarine', and 'DarkSlateGray'. Many CSS named colors originate here. Use as a reference for legacy and creative color names. Most modern CSS implementations accept these names directly.

Source type
derived
Confidence
high
License
MIT/X11 license (X Consortium)
Last reviewed
2026-05-24

Workflow tags

x11
named-color
legacy
brown

X11 colors are sRGB digital values from a 1980s color system. For print, convert to a process-appropriate color and proof against substrate.

X11 named colors · Sienna4 — #8B4726 | PantoneTools