#3F428F

#3F428F

Color Values

HEX

#3F428F

RGB

63, 66, 143

HSL

237.8, 38.8%, 40.4%

HSV

237.8, 55.9%, 56.1%

CMYK

55.9%, 53.8%, 0.0%, 43.9%

OKLCH

0.4196 0.1248 277.9

Properties

Cool Dark Nearest: darkslateblue

Color Harmonies

Complementary

#3F428F

#8F8C3F

Analogous

#3F6A8F

#643F8F

#3F428F

Triadic

#3F428F

#8F3F42

#428F3F

Split Complementary

#3F428F

#8F643F

#6A8F3F

Tetradic

#3F428F

#8F3F6A

#8F8C3F

#3F8F64

Color Blindness Simulation

Original

#3F428F

Protanopia

#40407C

Deuteranopia

#404078

Tritanopia

#3F6E6A

Achromatopsia

#474747

CSS Usage

background-color: #3F428F;
color: #3F428F;
border-color: #3F428F;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F5F5FA
100
#E7E8F3
200
#CDCEE9
300
#AAACDA
400
#7C7FC5
500
#4E52B1
600
#3E418E
700
#323471
800
#272958
900
#202141
950
#141529

Contrast Checker

Text on white

8.8:1

AA Pass AAA Pass

Text on black

2.39:1

AA Fail 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