#3F588D

#3F588D

Color Values

HEX

#3F588D

RGB

63, 88, 141

HSL

220.8, 38.2%, 40.0%

HSV

220.8, 55.3%, 55.3%

CMYK

55.3%, 37.6%, 0.0%, 44.7%

OKLCH

0.4658 0.0918 264.0

Properties

Cool Dark Nearest: RAL 5007 Brilliant Blue

Color Harmonies

Complementary

#3F588D

#8D743F

Analogous

#3F7F8D

#4D3F8D

#3F588D

Triadic

#3F588D

#8D3F58

#588D3F

Split Complementary

#3F588D

#8D4D3F

#7F8D3F

Tetradic

#3F588D

#8D3F7F

#8D743F

#3F8D4D

Color Blindness Simulation

Original

#3F588D

Protanopia

#4A4A80

Deuteranopia

#48467D

Tritanopia

#407674

Achromatopsia

#575757

CSS Usage

background-color: #3F588D;
color: #3F588D;
border-color: #3F588D;
Nearest Tailwind: Sky 800 #075985

Tailwind Shades

50
#F5F6FA
100
#E7EBF3
200
#CED6E9
300
#AAB9D9
400
#7D94C5
500
#4F6EB0
600
#3F588D
700
#324671
800
#273758
900
#202A41
950
#141B29

Contrast Checker

Text on white

7.02:1

AA Pass AAA Pass

Text on black

2.99:1

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