Sky 50
sky-50 · #F0F9FF
HEX
#F0F9FF
RGB
rgb(240, 249, 255)
CMYK
cmyk(6%, 2%, 0%, 0%)
HSL
hsl(204, 100%, 97%)
LAB
lab(97.4, -1.9, -3.9)
What is Sky 50?
Sky 50 is the sky-50 reference in the Tailwind CSS palette. Its sRGB value is #F0F9FF (rgb 240, 249, 255). 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 Sky 50 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Sky 50
An 11-step tonal scale derived from Sky 50 (#F0F9FF). 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
#FEFFFF
#FEFFFF
100
#FDFEFF
#FDFEFF
200
#FAFDFF
#FAFDFF
300
#F8FCFF
#F8FCFF
400
#F4FBFF
#F4FBFF
500
#F0F9FF
#F0F9FF
600
#CCD4D9
#CCD4D9
700
#9CA2A6
#9CA2A6
800
#6C7073
#6C7073
900
#3C3E40
#3C3E40
950
#1D1E1F
#1D1E1F
Lighter tints (mixed with white)
15%
#F2FAFF
30%
#F5FBFF
45%
#F7FCFF
60%
#F9FDFF
75%
#FBFEFF
Darker shades (mixed with black)
15%
#DFE8ED
30%
#CDD5DA
45%
#B8BFC4
60%
#9FA6AA
75%
#818689
Color harmonies for Sky 50
Classic color-theory harmonies derived from rotating the hue of Sky 50. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#F0F9FF
#F0F9FF
#FFF6F0
#FFF6F0
Triadic
Three colors 120° apart
#F0F9FF
#F0F9FF
#FFF0F9
#FFF0F9
#F9FFF0
#F9FFF0
Analogous
Two neighbors ±30° on the wheel
#F0FFFD
#F0FFFD
#F0F9FF
#F0F9FF
#F0F1FF
#F0F1FF
Split-complementary
Base + two colors flanking its complement
#F0F9FF
#F0F9FF
#FFF0F1
#FFF0F1
#FFFDF0
#FFFDF0
Tetradic
Two complementary pairs
#F0F9FF
#F0F9FF
#F6F0FF
#F6F0FF
#FFF6F0
#FFF6F0
#F9FFF0
#F9FFF0
Square
Four colors evenly spaced 90° apart
#F0F9FF
#F0F9FF
#FDF0FF
#FDF0FF
#FFF6F0
#FFF6F0
#F1FFF0
#F1FFF0
Sky 50 in every color space
Full conversion of Sky 50 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
#F0F9FF
RGB
rgb(240, 249, 255)
CMYK
cmyk(6%, 2%, 0%, 0%)
HSL
hsl(204, 100%, 97%)
HSV
hsv(204, 6%, 100%)
HWB
hwb(204 94% 0%)
CIE Lab
lab(97.4 -1.9 -3.9)
OKLCH
oklch(97.7% 0.012 236.6)
XYZ (D65)
xyz(87.86, 93.50, 108.01)
Copy-ready code for Sky 50
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: #F0F9FF;
background-color: #F0F9FF;CSS variable
:root {
--color-sky-50: #F0F9FF;
}Tailwind config
// tailwind.config.js
colors: {
'sky-50': '#F0F9FF',
}Sass
$color-sky-50: #F0F9FF;Swift UIColor
UIColor(red: 0.941, green: 0.976, blue: 1.000, alpha: 1.0)Android XML
<color name="sky-50">#F0F9FF</color>Closest match in every color system
The nearest Sky 50 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 9016
#F6F6F6
Traffic white
RAL 9003
#F4F4F4
Signal white
RAL 9010
#FFFFFF
Pure white
RAL 7035
#D7D7D7
Light grey
RAL 9018
#D7D7D7
Papyrus white
RAL 9002
#E7EBDA
Grey white
FAQ about Sky 50
What is the HEX code for Sky 50?
Sky 50 (sky-50) has the HEX code #F0F9FF. In RGB it is rgb(240, 249, 255), and in CMYK it is cmyk(6%, 2%, 0%, 0%).
What is the OKLCH value of Sky 50?
Sky 50 converts to oklch(0.977 0.012 236.6). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Sky 50 accessible for body text?
Used as a background, Sky 50 has a contrast ratio of 19.70:1 with black text and 1.07:1 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 Sky 50?
The closest Pantone reference to Sky 50 by ΔE2000 perceptual distance is Pantone Cool Gray 1 C (#D9D9D6). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Sky 50?
The closest RAL Classic reference to Sky 50 by ΔE2000 distance is RAL 9016 (Traffic white, #F6F6F6). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Sky 50?
The complementary color (180° opposite on the HSL color wheel) of Sky 50 is #FFF6F0. 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.