#3F506F

#3F506F

Color Values

HEX

#3F506F

RGB

63, 80, 111

HSL

218.8, 27.6%, 34.1%

HSV

218.8, 43.2%, 43.5%

CMYK

43.2%, 27.9%, 0.0%, 56.5%

OKLCH

0.4305 0.056 262.1

Properties

Cool Dark Nearest: RAL 5000 Violet Blue

Color Harmonies

Complementary

#3F506F

#6F5E3F

Analogous

#3F686F

#463F6F

#3F506F

Triadic

#3F506F

#6F3F50

#506F3F

Split Complementary

#3F506F

#6F463F

#686F3F

Tetradic

#3F506F

#6F3F68

#6F5E3F

#3F6F46

Color Blindness Simulation

Original

#3F506F

Protanopia

#464768

Deuteranopia

#454466

Tritanopia

#406260

Achromatopsia

#4F4F4F

CSS Usage

background-color: #3F506F;
color: #3F506F;
border-color: #3F506F;
Nearest Tailwind: Slate 600 #475569

Tailwind Shades

50
#F6F7F9
100
#E9ECF1
200
#D1D8E5
300
#B1BDD3
400
#8799BB
500
#5C75A3
600
#4A5E82
700
#3B4B68
800
#2E3B51
900
#242D3C
950
#171C26

Contrast Checker

Text on white

8.11:1

AA Pass AAA Pass

Text on black

2.59:1

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