#3F4557

#3F4557

Color Values

HEX

#3F4557

RGB

63, 69, 87

HSL

225.0, 16.0%, 29.4%

HSV

225.0, 27.6%, 34.1%

CMYK

27.6%, 20.7%, 0.0%, 65.9%

OKLCH

0.3923 0.0316 270.5

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#3F4557

#57513F

Analogous

#3F5157

#453F57

#3F4557

Triadic

#3F4557

#573F45

#45573F

Split Complementary

#3F4557

#57453F

#51573F

Tetradic

#3F4557

#573F51

#57513F

#3F5745

Color Blindness Simulation

Original

#3F4557

Protanopia

#424253

Deuteranopia

#414152

Tritanopia

#3F4F4E

Achromatopsia

#454545

CSS Usage

background-color: #3F4557;
color: #3F4557;
border-color: #3F4557;
Nearest Tailwind: Gray 700 #374151

Tailwind Shades

50
#F6F7F8
100
#EBECF0
200
#D6D8E1
300
#B8BDCC
400
#9299B0
500
#6B7594
600
#565E76
700
#454B5F
800
#363B4A
900
#292D37
950
#1A1C23

Contrast Checker

Text on white

9.54:1

AA Pass AAA Pass

Text on black

2.2:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026