#428BCB

#428BCB

Color Values

HEX

#428BCB

RGB

66, 139, 203

HSL

208.0, 56.8%, 52.7%

HSV

208.0, 67.5%, 79.6%

CMYK

67.5%, 31.5%, 0.0%, 20.4%

OKLCH

0.6191 0.1215 247.7

Properties

Cool Light Nearest: RAL 5012 Light Blue

Color Harmonies

Complementary

#428BCB

#CB8242

Analogous

#42CBC6

#4246CB

#428BCB

Triadic

#428BCB

#CB428B

#8BCB42

Split Complementary

#428BCB

#CB4246

#CBC642

Tetradic

#428BCB

#C642CB

#CB8242

#46CB42

Color Blindness Simulation

Original

#428BCB

Protanopia

#6262BC

Deuteranopia

#5D58B8

Tritanopia

#46AFAD

Achromatopsia

#808080

CSS Usage

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

Tailwind Shades

50
#F4F8FB
100
#E5EEF6
200
#C7DDF0
300
#9FC4E5
400
#6BA4D6
500
#3784C8
600
#2C6AA0
700
#235580
800
#1C4264
900
#183249
950
#0F202E

Contrast Checker

Text on white

3.63:1

AA Fail AAA Fail

Text on black

5.79:1

AA Pass AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026