#428FD9

#428FD9

Color Values

HEX

#428FD9

RGB

66, 143, 217

HSL

209.4, 66.5%, 55.5%

HSV

209.4, 69.6%, 85.1%

CMYK

69.6%, 34.1%, 0.0%, 14.9%

OKLCH

0.6358 0.135 250.0

Properties

Cool Light Nearest: RAL 5012 Light Blue

Color Harmonies

Complementary

#428FD9

#D98C42

Analogous

#42D9D7

#4244D9

#428FD9

Triadic

#428FD9

#D9428F

#8FD942

Split Complementary

#428FD9

#D94244

#D9D742

Tetradic

#428FD9

#D742D9

#D98C42

#44D942

Color Blindness Simulation

Original

#428FD9

Protanopia

#6364C7

Deuteranopia

#5F59C3

Tritanopia

#46B9B6

Achromatopsia

#848484

CSS Usage

background-color: #428FD9;
color: #428FD9;
border-color: #428FD9;
Nearest Tailwind: Sky 600 #0284C7

Tailwind Shades

50
#F3F7FC
100
#E3EDF7
200
#C4DCF3
300
#99C3EA
400
#62A2DF
500
#2B81D4
600
#2267AA
700
#1B5388
800
#15416A
900
#13314D
950
#0C1F31

Contrast Checker

Text on white

3.41:1

AA Fail AAA Fail

Text on black

6.16:1

AA Pass AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026