Blue 600
blue-600 · #2563EB
HEX
#2563EB
RGB
rgb(37, 99, 235)
CMYK
cmyk(84%, 58%, 0%, 8%)
HSL
hsl(221, 83%, 53%)
LAB
lab(46.1, 31.0, -73.8)
What is Blue 600?
Blue 600 is the blue-600 reference in the Tailwind CSS palette. Its sRGB value is #2563EB (rgb 37, 99, 235). 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 600 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Blue 600
An 11-step tonal scale derived from Blue 600 (#2563EB). 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
#EEF3FD
#EEF3FD
100
#DCE6FC
#DCE6FC
200
#B9CDF9
#B9CDF9
300
#92B1F5
#92B1F5
400
#5C8AF0
#5C8AF0
500
#2563EB
#2563EB
600
#1F54C8
#1F54C8
700
#184099
#184099
800
#112D6A
#112D6A
900
#09193B
#09193B
950
#040C1C
#040C1C
Lighter tints (mixed with white)
15%
#718AEE
30%
#98A7F1
45%
#B5BFF4
60%
#CDD3F7
75%
#E1E5FA
Darker shades (mixed with black)
15%
#225CDB
30%
#1E53C9
45%
#1A4AB4
60%
#153F9C
75%
#0F317E
Color harmonies for Blue 600
Classic color-theory harmonies derived from rotating the hue of Blue 600. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#2563EB
#2563EB
#EBAC24
#EBAC24
Triadic
Three colors 120° apart
#2563EB
#2563EB
#EB2463
#EB2463
#63EB24
#63EB24
Analogous
Two neighbors ±30° on the wheel
#24C6EB
#24C6EB
#2563EB
#2563EB
#4824EB
#4824EB
Split-complementary
Base + two colors flanking its complement
#2563EB
#2563EB
#EB4824
#EB4824
#C6EB24
#C6EB24
Tetradic
Two complementary pairs
#2563EB
#2563EB
#AC24EB
#AC24EB
#EBAC24
#EBAC24
#63EB24
#63EB24
Square
Four colors evenly spaced 90° apart
#2563EB
#2563EB
#EB24C6
#EB24C6
#EBAC24
#EBAC24
#24EB48
#24EB48
Blue 600 in every color space
Full conversion of Blue 600 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
#2563EB
RGB
rgb(37, 99, 235)
CMYK
cmyk(84%, 58%, 0%, 8%)
HSL
hsl(221, 83%, 53%)
HSV
hsv(221, 84%, 92%)
HWB
hwb(221 15% 8%)
CIE Lab
lab(46.1 31.0 -73.8)
OKLCH
oklch(54.6% 0.215 262.9)
XYZ (D65)
xyz(20.21, 15.31, 80.47)
Copy-ready code for Blue 600
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: #2563EB;
background-color: #2563EB;CSS variable
:root {
--color-blue-600: #2563EB;
}Tailwind config
// tailwind.config.js
colors: {
'blue-600': '#2563EB',
}Sass
$color-blue-600: #2563EB;Swift UIColor
UIColor(red: 0.145, green: 0.388, blue: 0.922, alpha: 1.0)Android XML
<color name="blue-600">#2563EB</color>Closest match in every color system
The nearest Blue 600 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 5015
#2271B3
Sky blue
RAL 5023
#49678D
Distant blue
RAL 5007
#3E5F8A
Brilliant blue
RAL 5012
#3B83BD
Light blue
RAL 5019
#1B5583
Capri blue
RAL 5014
#606E8C
Pigeon blue
FAQ about Blue 600
What is the HEX code for Blue 600?
Blue 600 (blue-600) has the HEX code #2563EB. In RGB it is rgb(37, 99, 235), and in CMYK it is cmyk(84%, 58%, 0%, 8%).
What is the OKLCH value of Blue 600?
Blue 600 converts to oklch(0.546 0.215 262.9). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Blue 600 accessible for body text?
Used as a background, Blue 600 has a contrast ratio of 4.06:1 with black text and 5.17:1 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 600?
The closest Pantone reference to Blue 600 by ΔE2000 perceptual distance is Pantone 7455 C (#3A5DAE). 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 600?
The closest RAL Classic reference to Blue 600 by ΔE2000 distance is RAL 5015 (Sky blue, #2271B3). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Blue 600?
The complementary color (180° opposite on the HSL color wheel) of Blue 600 is #EBAC24. 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.