#3F408B

#3F408B

Color Values

HEX

#3F408B

RGB

63, 64, 139

HSL

239.2, 37.6%, 39.6%

HSV

239.2, 54.7%, 54.5%

CMYK

54.7%, 54.0%, 0.0%, 45.5%

OKLCH

0.4126 0.1218 279.1

Properties

Cool Dark Nearest: darkslateblue

Color Harmonies

Complementary

#3F408B

#8B8A3F

Analogous

#3F668B

#643F8B

#3F408B

Triadic

#3F408B

#8B3F40

#408B3F

Split Complementary

#3F408B

#8B643F

#668B3F

Tetradic

#3F408B

#8B3F66

#8B8A3F

#3F8B64

Color Blindness Simulation

Original

#3F408B

Protanopia

#3F3F79

Deuteranopia

#3F3F74

Tritanopia

#3F6B67

Achromatopsia

#454545

CSS Usage

background-color: #3F408B;
color: #3F408B;
border-color: #3F408B;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F5F5FA
100
#E7E8F3
200
#CECEE9
300
#ABABD9
400
#7D7EC4
500
#5051AF
600
#40418C
700
#333470
800
#282858
900
#202041
950
#141529

Contrast Checker

Text on white

9.06:1

AA Pass AAA Pass

Text on black

2.32:1

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