#3F4359

#3F4359

Color Values

HEX

#3F4359

RGB

63, 67, 89

HSL

230.8, 17.1%, 29.8%

HSV

230.8, 29.2%, 34.9%

CMYK

29.2%, 24.7%, 0.0%, 65.1%

OKLCH

0.3884 0.0378 276.5

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#3F4359

#59553F

Analogous

#3F5059

#483F59

#3F4359

Triadic

#3F4359

#593F43

#43593F

Split Complementary

#3F4359

#59483F

#50593F

Tetradic

#3F4359

#593F50

#59553F

#3F5948

Color Blindness Simulation

Original

#3F4359

Protanopia

#414154

Deuteranopia

#404052

Tritanopia

#3F4F4F

Achromatopsia

#444444

CSS Usage

background-color: #3F4359;
color: #3F4359;
border-color: #3F4359;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F6F7F8
100
#EBEBF0
200
#D5D7E1
300
#B7BBCC
400
#9195B1
500
#6A7095
600
#555A77
700
#444860
800
#35384B
900
#292B38
950
#1A1B23

Contrast Checker

Text on white

9.73:1

AA Pass AAA Pass

Text on black

2.16:1

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