#428CCF

#428CCF

Color Values

HEX

#428CCF

RGB

66, 140, 207

HSL

208.5, 59.5%, 53.5%

HSV

208.5, 68.1%, 81.2%

CMYK

68.1%, 32.4%, 0.0%, 18.8%

OKLCH

0.6235 0.1255 248.5

Properties

Cool Light Nearest: RAL 5012 Light Blue

Color Harmonies

Complementary

#428CCF

#CF8542

Analogous

#42CFCB

#4245CF

#428CCF

Triadic

#428CCF

#CF428C

#8CCF42

Split Complementary

#428CCF

#CF4245

#CFCB42

Tetradic

#428CCF

#CB42CF

#CF8542

#45CF42

Color Blindness Simulation

Original

#428CCF

Protanopia

#6263BF

Deuteranopia

#5E58BB

Tritanopia

#46B2AF

Achromatopsia

#818181

CSS Usage

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

Tailwind Shades

50
#F3F8FB
100
#E4EEF6
200
#C6DCF1
300
#9DC4E6
400
#69A3D9
500
#3483CB
600
#2969A3
700
#215482
800
#1A4266
900
#17324A
950
#0E1F2F

Contrast Checker

Text on white

3.57:1

AA Fail AAA Fail

Text on black

5.88:1

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