Blue 950
blue-950 · #172554
HEX
#172554
RGB
rgb(23, 37, 84)
CMYK
cmyk(73%, 56%, 0%, 67%)
HSL
hsl(226, 57%, 21%)
LAB
lab(16.2, 12.0, -30.4)
What is Blue 950?
Blue 950 is the blue-950 reference in the Tailwind CSS palette. Its sRGB value is #172554 (rgb 23, 37, 84). It sits in the blue family. The default color palette shipped with Tailwind CSS v3 by Tailwind Labs. 22 color families across 11 lightness steps (50 to 950). See disclaimer for accuracy and trademark notes.
Accessibility
WCAG 2.1 contrast checks for Blue 950 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Blue 950
An 11-step tonal scale derived from Blue 950 (#172554). 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
#ECEEF1
#ECEEF1
100
#DADCE4
#DADCE4
200
#B5B9C8
#B5B9C8
300
#8B92AA
#8B92AA
400
#515C7F
#515C7F
500
#172554
#172554
600
#141F47
#141F47
700
#0F1837
#0F1837
800
#0A1126
#0A1126
900
#060915
#060915
950
#03040A
#03040A
Lighter tints (mixed with white)
15%
#6E7183
30%
#9698A2
45%
#B4B5BB
60%
#CCCDD1
75%
#E1E1E4
Darker shades (mixed with black)
15%
#15224E
30%
#121E46
45%
#0F1A3E
60%
#0B1535
75%
#070F29
Color harmonies for Blue 950
Classic color-theory harmonies derived from rotating the hue of Blue 950. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#172554
#172554
#544617
#544617
Triadic
Three colors 120° apart
#172554
#172554
#541725
#541725
#255417
#255417
Analogous
Two neighbors ±30° on the wheel
#174454
#174454
#172554
#172554
#271754
#271754
Split-complementary
Base + two colors flanking its complement
#172554
#172554
#542717
#542717
#445417
#445417
Tetradic
Two complementary pairs
#172554
#172554
#461754
#461754
#544617
#544617
#255417
#255417
Square
Four colors evenly spaced 90° apart
#172554
#172554
#541744
#541744
#544617
#544617
#175427
#175427
Blue 950 in every color space
Full conversion of Blue 950 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
#172554
RGB
rgb(23, 37, 84)
CMYK
cmyk(73%, 56%, 0%, 67%)
HSL
hsl(226, 57%, 21%)
HSV
hsv(226, 73%, 33%)
HWB
hwb(226 9% 67%)
CIE Lab
lab(16.2 12.0 -30.4)
OKLCH
oklch(28.2% 0.087 267.9)
XYZ (D65)
xyz(2.61, 2.15, 8.66)
Copy-ready code for Blue 950
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: #172554;
background-color: #172554;CSS variable
:root {
--color-blue-950: #172554;
}Tailwind config
// tailwind.config.js
colors: {
'blue-950': '#172554',
}Sass
$color-blue-950: #172554;Swift UIColor
UIColor(red: 0.090, green: 0.145, blue: 0.329, alpha: 1.0)Android XML
<color name="blue-950">#172554</color>Closest match in every color system
The nearest Blue 950 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 Tailwind CSS palette
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 5002
#20214F
Ultramarine blue
RAL 5005
#1E2460
Signal blue
RAL 5022
#252850
Night blue
RAL 5010
#0E294B
Gentian blue
RAL 5013
#1E213D
Cobalt blue
RAL 5017
#063971
Traffic blue
FAQ about Blue 950
What is the HEX code for Blue 950?
Blue 950 (blue-950) has the HEX code #172554. In RGB it is rgb(23, 37, 84), and in CMYK it is cmyk(73%, 56%, 0%, 67%).
What is the OKLCH value of Blue 950?
Blue 950 converts to oklch(0.282 0.087 267.9). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Blue 950 accessible for body text?
Used as a background, Blue 950 has a contrast ratio of 1.43:1 with black text and 14.69:1 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 Blue 950?
The closest Pantone reference to Blue 950 by ΔE2000 perceptual distance is Pantone 282 C (#041E42). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Blue 950?
The closest RAL Classic reference to Blue 950 by ΔE2000 distance is RAL 5002 (Ultramarine blue, #20214F). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Blue 950?
The complementary color (180° opposite on the HSL color wheel) of Blue 950 is #544617. Use it for high-contrast accents, error states, or call-to-action pairings.
Data provenance & source
Tailwind CSS default palette (v3)
The default color palette shipped with Tailwind CSS v3 by Tailwind Labs Inc. Use as a reference for design tokens, web color systems, and Tailwind-based design conversations. Names like 'blue-500' are the project's own naming convention.
- Source type
- derived
- Confidence
- high
- License
- MIT
- Last reviewed
- 2026-05-24
Workflow tags
Tailwind palette values are designed for digital interfaces under sRGB. For print, convert to a process-appropriate value and proof against the substrate; do not rely on sRGB CMYK conversion for color-critical print work.