Blue 50
blue-50 · #EFF6FF
HEX
#EFF6FF
RGB
rgb(239, 246, 255)
CMYK
cmyk(6%, 4%, 0%, 0%)
HSL
hsl(214, 100%, 97%)
LAB
lab(96.6, -0.7, -5.1)
What is Blue 50?
Blue 50 is the blue-50 reference in the Tailwind CSS palette. Its sRGB value is #EFF6FF (rgb 239, 246, 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 Blue 50 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Blue 50
An 11-step tonal scale derived from Blue 50 (#EFF6FF). 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
#FEFEFF
#FEFEFF
100
#FCFEFF
#FCFEFF
200
#FAFCFF
#FAFCFF
300
#F7FBFF
#F7FBFF
400
#F3F8FF
#F3F8FF
500
#EFF6FF
#EFF6FF
600
#CBD1D9
#CBD1D9
700
#9BA0A6
#9BA0A6
800
#6C6F73
#6C6F73
900
#3C3E40
#3C3E40
950
#1D1E1F
#1D1E1F
Lighter tints (mixed with white)
15%
#F1F7FF
30%
#F4F9FF
45%
#F6FAFF
60%
#F9FBFF
75%
#FBFDFF
Darker shades (mixed with black)
15%
#DEE5ED
30%
#CCD2DA
45%
#B7BDC4
60%
#9FA3AA
75%
#808489
Color harmonies for Blue 50
Classic color-theory harmonies derived from rotating the hue of Blue 50. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#EFF6FF
#EFF6FF
#FFF8F0
#FFF8F0
Triadic
Three colors 120° apart
#EFF6FF
#EFF6FF
#FFF0F6
#FFF0F6
#F6FFF0
#F6FFF0
Analogous
Two neighbors ±30° on the wheel
#F0FEFF
#F0FEFF
#EFF6FF
#EFF6FF
#F1F0FF
#F1F0FF
Split-complementary
Base + two colors flanking its complement
#EFF6FF
#EFF6FF
#FFF1F0
#FFF1F0
#FEFFF0
#FEFFF0
Tetradic
Two complementary pairs
#EFF6FF
#EFF6FF
#F8F0FF
#F8F0FF
#FFF8F0
#FFF8F0
#F6FFF0
#F6FFF0
Square
Four colors evenly spaced 90° apart
#EFF6FF
#EFF6FF
#FFF0FE
#FFF0FE
#FFF8F0
#FFF8F0
#F0FFF1
#F0FFF1
Blue 50 in every color space
Full conversion of Blue 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
#EFF6FF
RGB
rgb(239, 246, 255)
CMYK
cmyk(6%, 4%, 0%, 0%)
HSL
hsl(214, 100%, 97%)
HSV
hsv(214, 6%, 100%)
HWB
hwb(214 94% 0%)
CIE Lab
lab(96.6 -0.7 -5.1)
OKLCH
oklch(97.0% 0.014 254.6)
XYZ (D65)
xyz(86.60, 91.48, 107.68)
Copy-ready code for Blue 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: #EFF6FF;
background-color: #EFF6FF;CSS variable
:root {
--color-blue-50: #EFF6FF;
}Tailwind config
// tailwind.config.js
colors: {
'blue-50': '#EFF6FF',
}Sass
$color-blue-50: #EFF6FF;Swift UIColor
UIColor(red: 0.937, green: 0.965, blue: 1.000, alpha: 1.0)Android XML
<color name="blue-50">#EFF6FF</color>Closest match in every color system
The nearest Blue 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 Blue 50
What is the HEX code for Blue 50?
Blue 50 (blue-50) has the HEX code #EFF6FF. In RGB it is rgb(239, 246, 255), and in CMYK it is cmyk(6%, 4%, 0%, 0%).
What is the OKLCH value of Blue 50?
Blue 50 converts to oklch(0.970 0.014 254.6). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Blue 50 accessible for body text?
Used as a background, Blue 50 has a contrast ratio of 19.30:1 with black text and 1.09:1 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 Blue 50?
The closest Pantone reference to Blue 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 Blue 50?
The closest RAL Classic reference to Blue 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 Blue 50?
The complementary color (180° opposite on the HSL color wheel) of Blue 50 is #FFF8F0. 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.