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
White text on this color
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.
50
#F6F0EE
#F6F0EE
100
#ECE2DC
#ECE2DC
200
#DAC4BA
#DAC4BA
300
#C5A393
#C5A393
400
#A8755C
#A8755C
500
#8B4726
#8B4726
600
#763C20
#763C20
700
#5A2E19
#5A2E19
800
#3F2011
#3F2011
900
#23120A
#23120A
950
#110905
#110905
Lighter tints (mixed with white)
15%
#A47D71
30%
#B89E98
45%
#CAB9B5
60%
#DACFCD
75%
#E9E3E1
Darker shades (mixed with black)
15%
#814123
30%
#763B1F
45%
#69341B
60%
#5A2C15
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
#8B4726
#8B4726
#266A8C
#266A8C
Triadic
Three colors 120° apart
#8B4726
#8B4726
#268C48
#268C48
#48268C
#48268C
Analogous
Two neighbors ±30° on the wheel
#8C2637
#8C2637
#8B4726
#8B4726
#8C7B26
#8C7B26
Split-complementary
Base + two colors flanking its complement
#8B4726
#8B4726
#268C7B
#268C7B
#26378C
#26378C
Tetradic
Two complementary pairs
#8B4726
#8B4726
#6A8C26
#6A8C26
#266A8C
#266A8C
#48268C
#48268C
Square
Four colors evenly spaced 90° apart
#8B4726
#8B4726
#378C26
#378C26
#266A8C
#266A8C
#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.
Closest Pantone matches
Top 6 ΔE2000-closest Pantone references. Cross-system matching is approximate — see disclaimer.
Closest RAL Classic matches
Top 6 ΔE2000-closest RAL Classic references for industrial coating cross-reference.
RAL 8004
#8E402A
Copper brown
RAL 8003
#734222
Clay brown
RAL 8024
#79553D
Beige brown
RAL 8002
#6C3B2A
Signal brown
RAL 8023
#A65E2E
Orange brown
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 colors are sRGB digital values from a 1980s color system. For print, convert to a process-appropriate color and proof against substrate.