#3F474D

#3F474D

Color Values

HEX

#3F474D

RGB

63, 71, 77

HSL

205.7, 10.0%, 27.5%

HSV

205.7, 18.2%, 30.2%

CMYK

18.2%, 7.8%, 0.0%, 69.8%

OKLCH

0.3929 0.0146 240.3

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#3F474D

#4D453F

Analogous

#3F4D4C

#3F404D

#3F474D

Triadic

#3F474D

#4D3F47

#474D3F

Split Complementary

#3F474D

#4D3F40

#4D4C3F

Tetradic

#3F474D

#4C3F4D

#4D453F

#404D3F

Color Blindness Simulation

Original

#3F474D

Protanopia

#42434C

Deuteranopia

#42414B

Tritanopia

#3F4A4A

Achromatopsia

#464646

CSS Usage

background-color: #3F474D;
color: #3F474D;
border-color: #3F474D;
Nearest Tailwind: Zinc 700 #3F3F46

Tailwind Shades

50
#F7F7F8
100
#ECEDEF
200
#D8DCDF
300
#BCC3C8
400
#97A2AA
500
#73818C
600
#5C6770
700
#49535A
800
#394146
900
#2C3135
950
#1C1F21

Contrast Checker

Text on white

9.46:1

AA Pass AAA Pass

Text on black

2.22:1

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