Brown3
brown3 · #CD3333
HEX
#CD3333
RGB
rgb(205, 51, 51)
CMYK
cmyk(0%, 75%, 75%, 20%)
HSL
hsl(0, 61%, 50%)
LAB
lab(46.4, 59.4, 37.4)
What is Brown3?
Brown3 is the brown3 reference in the X11 named colors. Its sRGB value is #CD3333 (rgb 205, 51, 51). It sits in the red 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 Brown3 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Brown3
An 11-step tonal scale derived from Brown3 (#CD3333). 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
#FBEFEF
#FBEFEF
100
#F7DEDE
#F7DEDE
200
#EFBEBE
#EFBEBE
300
#E69999
#E69999
400
#DA6666
#DA6666
500
#CD3333
#CD3333
600
#AE2B2B
#AE2B2B
700
#852121
#852121
800
#5C1717
#5C1717
900
#330D0D
#330D0D
950
#190606
#190606
Lighter tints (mixed with white)
15%
#D67575
30%
#DE9A9A
45%
#E5B6B6
60%
#EDCDCD
75%
#F4E2E2
Darker shades (mixed with black)
15%
#BF2F2F
30%
#AF2A2A
45%
#9D2525
60%
#871E1E
75%
#6D1616
Color harmonies for Brown3
Classic color-theory harmonies derived from rotating the hue of Brown3. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#CD3333
#CD3333
#32CDCD
#32CDCD
Triadic
Three colors 120° apart
#CD3333
#CD3333
#32CD32
#32CD32
#3232CD
#3232CD
Analogous
Two neighbors ±30° on the wheel
#CD3280
#CD3280
#CD3333
#CD3333
#CD8032
#CD8032
Split-complementary
Base + two colors flanking its complement
#CD3333
#CD3333
#32CD80
#32CD80
#327FCD
#327FCD
Tetradic
Two complementary pairs
#CD3333
#CD3333
#CDCD32
#CDCD32
#32CDCD
#32CDCD
#3232CD
#3232CD
Square
Four colors evenly spaced 90° apart
#CD3333
#CD3333
#80CD32
#80CD32
#32CDCD
#32CDCD
#7F32CD
#7F32CD
Brown3 in every color space
Full conversion of Brown3 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
#CD3333
RGB
rgb(205, 51, 51)
CMYK
cmyk(0%, 75%, 75%, 20%)
HSL
hsl(0, 61%, 50%)
HSV
hsv(0, 75%, 80%)
HWB
hwb(0 20% 20%)
CIE Lab
lab(46.4 59.4 37.4)
OKLCH
oklch(56.1% 0.191 25.9)
XYZ (D65)
xyz(26.96, 15.59, 4.72)
Copy-ready code for Brown3
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: #CD3333;
background-color: #CD3333;CSS variable
:root {
--color-brown3: #CD3333;
}Tailwind config
// tailwind.config.js
colors: {
'brown3': '#CD3333',
}Sass
$color-brown3: #CD3333;Swift UIColor
UIColor(red: 0.804, green: 0.200, blue: 0.200, alpha: 1.0)Android XML
<color name="brown3">#CD3333</color>Closest match in every color system
The nearest Brown3 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 3028
#CB3234
Pure red
RAL 3018
#D53032
Strawberry red
RAL 2002
#CB2821
Vermilion
RAL 3027
#C51D34
Raspberry red
RAL 3017
#E63244
Rose
RAL 2001
#C93C20
Red orange
FAQ about Brown3
What is the HEX code for Brown3?
Brown3 (brown3) has the HEX code #CD3333. In RGB it is rgb(205, 51, 51), and in CMYK it is cmyk(0%, 75%, 75%, 20%).
What is the OKLCH value of Brown3?
Brown3 converts to oklch(0.561 0.191 25.9). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Brown3 accessible for body text?
Used as a background, Brown3 has a contrast ratio of 4.12:1 with black text and 5.10:1 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 Brown3?
The closest Pantone reference to Brown3 by ΔE2000 perceptual distance is Pantone 1797 C (#CB333B). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Brown3?
The closest RAL Classic reference to Brown3 by ΔE2000 distance is RAL 3028 (Pure red, #CB3234). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Brown3?
The complementary color (180° opposite on the HSL color wheel) of Brown3 is #32CDCD. 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.