#3F407D

#3F407D

Color Values

HEX

#3F407D

RGB

63, 64, 125

HSL

239.0, 33.0%, 36.9%

HSV

239.0, 49.6%, 49.0%

CMYK

49.6%, 48.8%, 0.0%, 51.0%

OKLCH

0.4026 0.1007 280.2

Properties

Cool Dark Nearest: mediumpurple 4

Color Harmonies

Complementary

#3F407D

#7D7C3F

Analogous

#3F5F7D

#5D3F7D

#3F407D

Triadic

#3F407D

#7D3F40

#407D3F

Split Complementary

#3F407D

#7D5D3F

#5F7D3F

Tetradic

#3F407D

#7D3F5F

#7D7C3F

#3F7D5D

Color Blindness Simulation

Original

#3F407D

Protanopia

#3F3F6E

Deuteranopia

#3F3F6B

Tritanopia

#3F6360

Achromatopsia

#444444

CSS Usage

background-color: #3F407D;
color: #3F407D;
border-color: #3F407D;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F5F5F9
100
#E8E8F2
200
#D0D0E7
300
#AEAED6
400
#8283C0
500
#5557AA
600
#444588
700
#37386D
800
#2B2B55
900
#22233F
950
#161628

Contrast Checker

Text on white

9.37:1

AA Pass AAA Pass

Text on black

2.24:1

AA Fail 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