Azure4
azure4 · #838B8B
HEX
#838B8B
RGB
rgb(131, 139, 139)
CMYK
cmyk(6%, 0%, 0%, 45%)
HSL
hsl(180, 3%, 53%)
LAB
lab(57.2, -2.9, -1.0)
What is Azure4?
Azure4 is the azure4 reference in the X11 named colors. Its sRGB value is #838B8B (rgb 131, 139, 139). It sits in the neutral 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 Azure4 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Azure4
An 11-step tonal scale derived from Azure4 (#838B8B). 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
#F5F6F6
#F5F6F6
100
#EBECEC
#EBECEC
200
#D7DADA
#D7DADA
300
#C1C5C5
#C1C5C5
400
#A2A8A8
#A2A8A8
500
#838B8B
#838B8B
600
#6F7676
#6F7676
700
#555A5A
#555A5A
800
#3B3F3F
#3B3F3F
900
#212323
#212323
950
#101111
#101111
Lighter tints (mixed with white)
15%
#9EA4A4
30%
#B4B8B8
45%
#C8CACA
60%
#D9DADA
75%
#E8E9E9
Darker shades (mixed with black)
15%
#7A8181
30%
#6F7676
45%
#636969
60%
#555A5A
75%
#434848
Color harmonies for Azure4
Classic color-theory harmonies derived from rotating the hue of Azure4. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#838B8B
#838B8B
#8B8484
#8B8484
Triadic
Three colors 120° apart
#838B8B
#838B8B
#8B848B
#8B848B
#8B8B84
#8B8B84
Analogous
Two neighbors ±30° on the wheel
#848B87
#848B87
#838B8B
#838B8B
#84878B
#84878B
Split-complementary
Base + two colors flanking its complement
#838B8B
#838B8B
#8B8487
#8B8487
#8B8784
#8B8784
Tetradic
Two complementary pairs
#838B8B
#838B8B
#84848B
#84848B
#8B8484
#8B8484
#8B8B84
#8B8B84
Square
Four colors evenly spaced 90° apart
#838B8B
#838B8B
#87848B
#87848B
#8B8484
#8B8484
#878B84
#878B84
Azure4 in every color space
Full conversion of Azure4 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
#838B8B
RGB
rgb(131, 139, 139)
CMYK
cmyk(6%, 0%, 0%, 45%)
HSL
hsl(180, 3%, 53%)
HSV
hsv(180, 6%, 55%)
HWB
hwb(180 51% 45%)
CIE Lab
lab(57.2 -2.9 -1.0)
OKLCH
oklch(63.0% 0.009 196.9)
XYZ (D65)
xyz(23.25, 25.15, 28.05)
Copy-ready code for Azure4
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: #838B8B;
background-color: #838B8B;CSS variable
:root {
--color-azure4: #838B8B;
}Tailwind config
// tailwind.config.js
colors: {
'azure4': '#838B8B',
}Sass
$color-azure4: #838B8B;Swift UIColor
UIColor(red: 0.514, green: 0.545, blue: 0.545, alpha: 1.0)Android XML
<color name="azure4">#838B8B</color>Closest match in every color system
The nearest Azure4 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 7000
#7E8B92
Squirrel grey
RAL 9007
#8F8F8F
Grey aluminium
RAL 7042
#8D948D
Traffic grey A
RAL 7037
#7D7F7D
Dusty grey
RAL 7001
#8F999F
Silver grey
RAL 9023
#787878
Pearl dark grey
FAQ about Azure4
What is the HEX code for Azure4?
Azure4 (azure4) has the HEX code #838B8B. In RGB it is rgb(131, 139, 139), and in CMYK it is cmyk(6%, 0%, 0%, 45%).
What is the OKLCH value of Azure4?
Azure4 converts to oklch(0.630 0.009 196.9). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Azure4 accessible for body text?
Used as a background, Azure4 has a contrast ratio of 6.03:1 with black text and 3.48:1 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 Azure4?
The closest Pantone reference to Azure4 by ΔE2000 perceptual distance is Pantone Cool Gray 8 C (#888B8D). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Azure4?
The closest RAL Classic reference to Azure4 by ΔE2000 distance is RAL 7000 (Squirrel grey, #7E8B92). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Azure4?
The complementary color (180° opposite on the HSL color wheel) of Azure4 is #8B8484. 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.