Slate 300
slate-300 · #CBD5E1
HEX
#CBD5E1
RGB
rgb(203, 213, 225)
CMYK
cmyk(10%, 5%, 0%, 12%)
HSL
hsl(213, 27%, 84%)
LAB
lab(84.8, -1.1, -7.1)
What is Slate 300?
Slate 300 is the slate-300 reference in the Tailwind CSS palette. Its sRGB value is #CBD5E1 (rgb 203, 213, 225). 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 300 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Slate 300
An 11-step tonal scale derived from Slate 300 (#CBD5E1). 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
#FBFCFD
#FBFCFD
100
#F7F8FA
#F7F8FA
200
#EEF2F5
#EEF2F5
300
#E5EAF0
#E5EAF0
400
#D8E0E9
#D8E0E9
500
#CBD5E1
#CBD5E1
600
#ADB5BF
#ADB5BF
700
#848A92
#848A92
800
#5B6065
#5B6065
900
#333538
#333538
950
#181A1B
#181A1B
Lighter tints (mixed with white)
15%
#D4DCE6
30%
#DCE3EB
45%
#E4E9EF
60%
#ECEFF4
75%
#F3F5F8
Darker shades (mixed with black)
15%
#BDC6D1
30%
#ADB6C0
45%
#9BA3AC
60%
#868D95
75%
#6C7178
Color harmonies for Slate 300
Classic color-theory harmonies derived from rotating the hue of Slate 300. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#CBD5E1
#CBD5E1
#E1D7CB
#E1D7CB
Triadic
Three colors 120° apart
#CBD5E1
#CBD5E1
#E1CBD5
#E1CBD5
#D5E1CB
#D5E1CB
Analogous
Two neighbors ±30° on the wheel
#CBE0E1
#CBE0E1
#CBD5E1
#CBD5E1
#CCCBE1
#CCCBE1
Split-complementary
Base + two colors flanking its complement
#CBD5E1
#CBD5E1
#E1CCCB
#E1CCCB
#E0E1CB
#E0E1CB
Tetradic
Two complementary pairs
#CBD5E1
#CBD5E1
#D7CBE1
#D7CBE1
#E1D7CB
#E1D7CB
#D5E1CB
#D5E1CB
Square
Four colors evenly spaced 90° apart
#CBD5E1
#CBD5E1
#E1CBE0
#E1CBE0
#E1D7CB
#E1D7CB
#CBE1CC
#CBE1CC
Slate 300 in every color space
Full conversion of Slate 300 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
#CBD5E1
RGB
rgb(203, 213, 225)
CMYK
cmyk(10%, 5%, 0%, 12%)
HSL
hsl(213, 27%, 84%)
HSV
hsv(213, 10%, 88%)
HWB
hwb(213 80% 12%)
CIE Lab
lab(84.8 -1.1 -7.1)
OKLCH
oklch(86.9% 0.020 252.9)
XYZ (D65)
xyz(62.01, 65.72, 80.64)
Copy-ready code for Slate 300
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: #CBD5E1;
background-color: #CBD5E1;CSS variable
:root {
--color-slate-300: #CBD5E1;
}Tailwind config
// tailwind.config.js
colors: {
'slate-300': '#CBD5E1',
}Sass
$color-slate-300: #CBD5E1;Swift UIColor
UIColor(red: 0.796, green: 0.835, blue: 0.882, alpha: 1.0)Android XML
<color name="slate-300">#CBD5E1</color>Closest match in every color system
The nearest Slate 300 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 7035
#D7D7D7
Light grey
RAL 9018
#D7D7D7
Papyrus white
RAL 9003
#F4F4F4
Signal white
RAL 9016
#F6F6F6
Traffic white
RAL 9010
#FFFFFF
Pure white
RAL 7038
#B5B8B1
Agate grey
FAQ about Slate 300
What is the HEX code for Slate 300?
Slate 300 (slate-300) has the HEX code #CBD5E1. In RGB it is rgb(203, 213, 225), and in CMYK it is cmyk(10%, 5%, 0%, 12%).
What is the OKLCH value of Slate 300?
Slate 300 converts to oklch(0.869 0.020 252.9). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Slate 300 accessible for body text?
Used as a background, Slate 300 has a contrast ratio of 14.14:1 with black text and 1.48:1 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 Slate 300?
The closest Pantone reference to Slate 300 by ΔE2000 perceptual distance is Pantone 290 C (#B9D9EB). 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 300?
The closest RAL Classic reference to Slate 300 by ΔE2000 distance is RAL 7035 (Light grey, #D7D7D7). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Slate 300?
The complementary color (180° opposite on the HSL color wheel) of Slate 300 is #E1D7CB. 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.