#3F4F59

#3F4F59

Color Values

HEX

#3F4F59

RGB

63, 79, 89

HSL

203.1, 17.1%, 29.8%

HSV

203.1, 29.2%, 34.9%

CMYK

29.2%, 11.2%, 0.0%, 65.1%

OKLCH

0.4178 0.0262 235.7

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#3F4F59

#59493F

Analogous

#3F5956

#3F4259

#3F4F59

Triadic

#3F4F59

#593F4F

#4F593F

Split Complementary

#3F4F59

#593F42

#59563F

Tetradic

#3F4F59

#563F59

#59493F

#42593F

Color Blindness Simulation

Original

#3F4F59

Protanopia

#464657

Deuteranopia

#454456

Tritanopia

#405554

Achromatopsia

#4C4C4C

CSS Usage

background-color: #3F4F59;
color: #3F4F59;
border-color: #3F4F59;
Nearest Tailwind: Gray 600 #4B5563

Tailwind Shades

50
#F6F8F8
100
#EBEEF0
200
#D5DDE1
300
#B7C4CC
400
#91A4B1
500
#6A8595
600
#556A77
700
#445560
800
#35424B
900
#293238
950
#1A2023

Contrast Checker

Text on white

8.49:1

AA Pass AAA Pass

Text on black

2.47:1

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