#3F45B8

#3F45B8

Color Values

HEX

#3F45B8

RGB

63, 69, 184

HSL

237.0, 49.0%, 48.4%

HSV

237.0, 65.8%, 72.2%

CMYK

65.8%, 62.5%, 0.0%, 27.8%

OKLCH

0.4582 0.1781 274.6

Properties

Cool Dark Nearest: slateblue 3

Color Harmonies

Complementary

#3F45B8

#B8B23F

Analogous

#3F81B8

#753FB8

#3F45B8

Triadic

#3F45B8

#B83F45

#45B83F

Split Complementary

#3F45B8

#B8753F

#81B83F

Tetradic

#3F45B8

#B83F81

#B8B23F

#3FB875

Color Blindness Simulation

Original

#3F45B8

Protanopia

#42429C

Deuteranopia

#414195

Tritanopia

#3F8681

Achromatopsia

#4C4C4C

CSS Usage

background-color: #3F45B8;
color: #3F45B8;
border-color: #3F45B8;
Nearest Tailwind: Blue 800 #1E40AF

Tailwind Shades

50
#F4F4FB
100
#E6E6F5
200
#CACCED
300
#A4A7E0
400
#7277CF
500
#4147BE
600
#343998
700
#2A2E7A
800
#21245F
900
#1B1D46
950
#11122C

Contrast Checker

Text on white

7.62:1

AA Pass AAA Pass

Text on black

2.75:1

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