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X11 named colors

Sienna3

sienna3 · #CD6839

HEX

#CD6839

RGB

rgb(205, 104, 57)

CMYK

cmyk(0%, 49%, 72%, 20%)

HSL

hsl(19, 60%, 51%)

LAB

lab(55.3, 36.5, 43.8)

What is Sienna3?

Sienna3 is the sienna3 reference in the X11 named colors. Its sRGB value is #CD6839 (rgb 205, 104, 57). It sits in the orange 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 Sienna3 as a background.

Black text on this color

Sample text · 5.64 : 1
AA Normal
AA Large
AAA Normal
AAA Large

White text on this color

Sample text · 3.73 : 1
AA Normal
AA Large
AAA Normal
AAA Large

Shades, tints & tonal scale of Sienna3

An 11-step tonal scale derived from Sienna3 (#CD6839). 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 #FBF3EF

50

#FBF3EF

#FBF3EF

Copied #F7E7DF

100

#F7E7DF

#F7E7DF

Copied #EFCFC0

200

#EFCFC0

#EFCFC0

Copied #E6B49C

300

#E6B49C

#E6B49C

Copied #DA8E6B

400

#DA8E6B

#DA8E6B

Copied #CD6839

500

#CD6839

#CD6839

Copied #AE5830

600

#AE5830

#AE5830

Copied #854425

700

#854425

#854425

Copied #5C2F1A

800

#5C2F1A

#5C2F1A

Copied #331A0E

900

#331A0E

#331A0E

Copied #190C07

950

#190C07

#190C07

Lighter tints (mixed with white)

Copied #D68D77

15%

#D68D77

Copied #DEA99B

30%

#DEA99B

Copied #E5C0B7

45%

#E5C0B7

Copied #EDD4CE

60%

#EDD4CE

Copied #F4E5E2

75%

#F4E5E2

Darker shades (mixed with black)

Copied #BF6034

15%

#BF6034

Copied #AF582F

30%

#AF582F

Copied #9D4E29

45%

#9D4E29

Copied #874322

60%

#874322

Copied #6D341A

75%

#6D341A

Color harmonies for Sienna3

Classic color-theory harmonies derived from rotating the hue of Sienna3. Use these to build accent palettes, brand systems, and accessible UI color pairings.

Complementary

180° opposite — strongest contrast

Copied #CD6839

#CD6839

#CD6839

Copied #379ECD

#379ECD

#379ECD

Triadic

Three colors 120° apart

Copied #CD6839

#CD6839

#CD6839

Copied #37CD67

#37CD67

#37CD67

Copied #6737CD

#6737CD

#6737CD

Analogous

Two neighbors ±30° on the wheel

Copied #CD3753

#CD3753

#CD3753

Copied #CD6839

#CD6839

#CD6839

Copied #CDB237

#CDB237

#CDB237

Split-complementary

Base + two colors flanking its complement

Copied #CD6839

#CD6839

#CD6839

Copied #37CDB2

#37CDB2

#37CDB2

Copied #3753CD

#3753CD

#3753CD

Tetradic

Two complementary pairs

Copied #CD6839

#CD6839

#CD6839

Copied #9ECD37

#9ECD37

#9ECD37

Copied #379ECD

#379ECD

#379ECD

Copied #6737CD

#6737CD

#6737CD

Square

Four colors evenly spaced 90° apart

Copied #CD6839

#CD6839

#CD6839

Copied #53CD37

#53CD37

#53CD37

Copied #379ECD

#379ECD

#379ECD

Copied #B237CD

#B237CD

#B237CD

Sienna3 in every color space

Full conversion of Sienna3 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

#CD6839

RGB

rgb(205, 104, 57)

CMYK

cmyk(0%, 49%, 72%, 20%)

HSL

hsl(19, 60%, 51%)

HSV

hsv(19, 72%, 80%)

HWB

hwb(19 22% 20%)

CIE Lab

lab(55.3 36.5 43.8)

OKLCH

oklch(62.8% 0.142 44.1)

XYZ (D65)

xyz(30.87, 23.18, 6.72)

Copy-ready code for Sienna3

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: #CD6839;
background-color: #CD6839;

CSS variable

:root {
  --color-sienna3: #CD6839;
}

Tailwind config

// tailwind.config.js
colors: {
  'sienna3': '#CD6839',
}

Sass

$color-sienna3: #CD6839;

Swift UIColor

UIColor(red: 0.804, green: 0.408, blue: 0.224, alpha: 1.0)

Android XML

<color name="sienna3">#CD6839</color>

Closest match in every color system

The nearest Sienna3 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 #D84B20

RAL 2010

#D84B20

Signal orange

Copied #D95030

RAL 3022

#D95030

Salmon pink

Copied #F75E25

RAL 2008

#F75E25

Bright red orange

Copied #E55137

RAL 2012

#E55137

Salmon orange

Copied #F44611

RAL 2004

#F44611

Pure orange

Copied #A65E2E

RAL 8023

#A65E2E

Orange brown

FAQ about Sienna3

What is the HEX code for Sienna3?

Sienna3 (sienna3) has the HEX code #CD6839. In RGB it is rgb(205, 104, 57), and in CMYK it is cmyk(0%, 49%, 72%, 20%).

What is the OKLCH value of Sienna3?

Sienna3 converts to oklch(0.628 0.142 44.1). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.

Is Sienna3 accessible for body text?

Used as a background, Sienna3 has a contrast ratio of 5.64:1 with black text and 3.73:1 with white text. WCAG 2.1 AA requires 4.5:1 for normal text. The current recommendation is to use black text and verify in real UI context.

What is the closest Pantone to Sienna3?

The closest Pantone reference to Sienna3 by ΔE2000 perceptual distance is Pantone 1595 C (#D86018). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.

What is the closest RAL color to Sienna3?

The closest RAL Classic reference to Sienna3 by ΔE2000 distance is RAL 2010 (Signal orange, #D84B20). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.

What is the complementary color of Sienna3?

The complementary color (180° opposite on the HSL color wheel) of Sienna3 is #379ECD. 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
orange

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 · Sienna3 — #CD6839 | PantoneTools