Slate 500
slate-500 · #64748B
HEX
#64748B
RGB
rgb(100, 116, 139)
CMYK
cmyk(28%, 17%, 0%, 45%)
HSL
hsl(215, 16%, 47%)
LAB
lab(48.3, -0.3, -14.5)
What is Slate 500?
Slate 500 is the slate-500 reference in the Tailwind CSS palette. Its sRGB value is #64748B (rgb 100, 116, 139). It sits in the neutral 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 Slate 500 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Slate 500
An 11-step tonal scale derived from Slate 500 (#64748B). 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
#F3F4F6
#F3F4F6
100
#E6E9EC
#E6E9EC
200
#CDD3DA
#CDD3DA
300
#B2BAC5
#B2BAC5
400
#8B97A8
#8B97A8
500
#64748B
#64748B
600
#556376
#556376
700
#414B5A
#414B5A
800
#2D343F
#2D343F
900
#191D23
#191D23
950
#0C0E11
#0C0E11
Lighter tints (mixed with white)
15%
#8B95A4
30%
#A8AEB8
45%
#BFC3CA
60%
#D3D6DA
75%
#E5E6E9
Darker shades (mixed with black)
15%
#5D6B81
30%
#546276
45%
#4B5769
60%
#404B5A
75%
#323B48
Color harmonies for Slate 500
Classic color-theory harmonies derived from rotating the hue of Slate 500. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#64748B
#64748B
#8B7B65
#8B7B65
Triadic
Three colors 120° apart
#64748B
#64748B
#8B6575
#8B6575
#758B65
#758B65
Analogous
Two neighbors ±30° on the wheel
#65888B
#65888B
#64748B
#64748B
#68658B
#68658B
Split-complementary
Base + two colors flanking its complement
#64748B
#64748B
#8B6865
#8B6865
#888B65
#888B65
Tetradic
Two complementary pairs
#64748B
#64748B
#7B658B
#7B658B
#8B7B65
#8B7B65
#758B65
#758B65
Square
Four colors evenly spaced 90° apart
#64748B
#64748B
#8B6588
#8B6588
#8B7B65
#8B7B65
#658B68
#658B68
Slate 500 in every color space
Full conversion of Slate 500 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
#64748B
RGB
rgb(100, 116, 139)
CMYK
cmyk(28%, 17%, 0%, 45%)
HSL
hsl(215, 16%, 47%)
HSV
hsv(215, 28%, 55%)
HWB
hwb(215 39% 45%)
CIE Lab
lab(48.3 -0.3 -14.5)
OKLCH
oklch(55.4% 0.041 257.4)
XYZ (D65)
xyz(16.16, 17.06, 26.86)
Copy-ready code for Slate 500
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: #64748B;
background-color: #64748B;CSS variable
:root {
--color-slate-500: #64748B;
}Tailwind config
// tailwind.config.js
colors: {
'slate-500': '#64748B',
}Sass
$color-slate-500: #64748B;Swift UIColor
UIColor(red: 0.392, green: 0.455, blue: 0.545, alpha: 1.0)Android XML
<color name="slate-500">#64748B</color>Closest match in every color system
The nearest Slate 500 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 5014
#606E8C
Pigeon blue
RAL 5023
#49678D
Distant blue
RAL 5007
#3E5F8A
Brilliant blue
RAL 9023
#787878
Pearl dark grey
RAL 7000
#7E8B92
Squirrel grey
RAL 5015
#2271B3
Sky blue
FAQ about Slate 500
What is the HEX code for Slate 500?
Slate 500 (slate-500) has the HEX code #64748B. In RGB it is rgb(100, 116, 139), and in CMYK it is cmyk(28%, 17%, 0%, 45%).
What is the OKLCH value of Slate 500?
Slate 500 converts to oklch(0.554 0.041 257.4). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Slate 500 accessible for body text?
Used as a background, Slate 500 has a contrast ratio of 4.41:1 with black text and 4.76:1 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 Slate 500?
The closest Pantone reference to Slate 500 by ΔE2000 perceptual distance is Pantone Cool Gray 9 C (#75787B). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Slate 500?
The closest RAL Classic reference to Slate 500 by ΔE2000 distance is RAL 5014 (Pigeon blue, #606E8C). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Slate 500?
The complementary color (180° opposite on the HSL color wheel) of Slate 500 is #8B7B65. 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.